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git.eclipse.org / objectteams / org.eclipse.objectteams / 9c2223924fb5ec6a6b0ac068f093f3abc742746f / . / org.eclipse.jdt.core.tests.compiler / src / org / eclipse / jdt / core / tests / compiler / regression / GenericsRegressionTest_1_8.java
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/*******************************************************************************
* Copyright (c) 2013, 2014 GK Software AG, IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stephan Herrmann - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.tests.compiler.regression;
import java.util.Map;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import junit.framework.Test;
public class GenericsRegressionTest_1_8 extends AbstractRegressionTest {
static {
// TESTS_NAMES = new String[] { "testBug428198b" };
// TESTS_NUMBERS = new int[] { 40, 41, 43, 45, 63, 64 };
// TESTS_RANGE = new int[] { 11, -1 };
}
public GenericsRegressionTest_1_8(String name) {
super(name);
}
public static Class testClass() {
return GenericsRegressionTest_1_8.class;
}
public static Test suite() {
return buildMinimalComplianceTestSuite(testClass(), F_1_8);
}
public void testBug423070() {
this.runConformTest(
new String[] {
"junk/Junk3.java",
"package junk;\n" +
"\n" +
"import java.util.ArrayList;\n" +
"import java.util.Collections;\n" +
"import java.util.List;\n" +
"\n" +
"class ZZObject extends Object {\n" +
"}\n" +
"\n" +
"public class Junk3 {\n" +
"\n" +
" public static final List EMPTY_LIST = new ArrayList<>();\n" +
" public static final <T> List<T> emptyList() {\n" +
" return (List<T>) EMPTY_LIST;\n" +
" }\n" +
" \n" +
" public Junk3(List<ZZObject> list) {\n" +
" }\n" +
" \n" +
" //FAILS - if passed as argument\n" +
" public Junk3() {\n" +
" this(emptyList());\n" +
" }\n" +
" \n" +
"\n" +
" //WORKS - if you assign it (and lose type info?)\n" +
" static List works = emptyList();\n" +
" public Junk3(boolean bogus) {\n" +
" this(works);\n" +
" }\n" +
"}",
});
}
public void testConditionalExpression1() {
runConformTest(
new String[] {
"X.java",
"class A {}\n" +
"class B extends A {}\n" +
"public class X {\n" +
" <T> T combine(T x, T y) { return x; }\n" +
" A test(A a, B b, boolean flag) {\n" +
" return combine(flag ? a : b, a);\n" +
" }\n" +
"}\n"
});
}
public void testConditionalExpression2() {
runConformTest(
new String[] {
"X.java",
"class A{/**/}\n" +
"class B extends A {/**/}\n" +
"class C extends B {/**/}\n" +
"class G<T> {/**/}\n" +
"\n" +
"public class X {\n" +
"G<A> ga=null;\n" +
"G<B> gb=null;\n" +
"G<C> gc=null;\n" +
"G<? super A> gsa=null;\n" +
"G<? super B> gsb=null;\n" +
"G<? super C> gsc=null;\n" +
"\n" +
"@SuppressWarnings(\"unused\")\n" +
" public void test(boolean f) {\n" +
" G<? super B> l1 = (f) ? gsa : gb;\n" +
" G<? super B> l2 = (f) ? gsb : gb;\n" +
" G<? super C> l3 = (f) ? gsc : gb;\n" +
" G<? super B> l4 = (f) ? gsb : gsb;\n" +
" }\n" +
"}"
});
}
public void testBug423839() {
runConformTest(
new String[] {
"Test.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"\n" +
"public class Test<T> {\n" +
"\n" +
" public <T> T randomElement(Collection<T> list) {\n" +
" return randomElement(list instanceof List ? list : new ArrayList<>(list));\n" +
" }\n" +
"\n" +
"}\n"
});
}
public void testBug418807() {
runConformTest(
new String[] {
"Word.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.Stream;\n" +
" \n" +
"public class Word {\n" +
" private final String str;\n" +
"\n" +
" public Word(String s) {\n" +
" str = s;\n" +
" }\n" +
"\n" +
" @Override\n" +
" public String toString() {\n" +
" return str;\n" +
" }\n" +
"\n" +
" public static void main(String[] args) {\n" +
" List<String> names = Arrays.asList(\"Aaron\", \"Jack\", \"Ben\");\n" +
" Stream<Word> ws = names.stream().map(Word::new);\n" +
" List<Word> words = ws.collect(Collectors.toList());\n" +
" words.forEach(System.out::println);\n" +
" }\n" +
"}\n"
});
}
public void testBug414631() {
runConformTest(
new String[] {
"test/Y.java",
"package test;\n" +
"import java.util.function.Supplier;\n" +
"public abstract class Y<E> {\n" +
" public static <E> Y<E> empty() { return null;}\n" +
" public static <E> Y<E> cons(E head, Supplier<Y<E>> tailFun) {return null;}\n" +
"}",
"test/X.java",
"package test;\n" +
"import static test.Y.*;\n" +
"public class X {\n" +
" public void foo() {\n" +
" Y<String> generated = cons(\"a\", () -> cons(\"b\", Y::<String>empty));\n" +
" }\n" +
"}\n"
});
}
public void testBug424038() {
runNegativeTest(
new String[] {
"Foo.java",
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"public class Foo<E> {\n" +
"\n" +
" public void gather() {\n" +
" StreamLike<E> stream = null;\n" +
" List<Stuff<E>> list1 = stream.gather(() -> new Stuff<>()).toList();\n" +
" List<Consumer<E>> list2 = stream.gather(() -> new Stuff<>()).toList(); // ERROR\n" +
" }\n" +
"\n" +
" interface StreamLike<E> {\n" +
" <T extends Consumer<E>> StreamLike<T> gather(Supplier<T> gatherer);\n" +
"\n" +
" List<E> toList();\n" +
" }\n" +
"\n" +
" static class Stuff<T> implements Consumer<T> {\n" +
" public void accept(T t) {}\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Foo.java (at line 8)\n" +
" List<Consumer<E>> list2 = stream.gather(() -> new Stuff<>()).toList(); // ERROR\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from List<Foo.Stuff<E>> to List<Consumer<E>>\n" +
"----------\n");
}
// https://bugs.eclipse.org/423504 - [1.8] Implement "18.5.3 Functional Interface Parameterization Inference"
public void testBug423504() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" public static void main(String argv[]) {\n" +
" I<? extends Collection<String>> sorter = (List<String> m) -> { /* sort */ };\n" +
" }\n" +
"} \n" +
"\n" +
"interface I<T> { \n" +
" public void sort(T col);\n" +
"}\n"
});
}
// https://bugs.eclipse.org/420525 - [1.8] [compiler] Incorrect error "The type Integer does not define sum(Object, Object) that is applicable here"
public void testBug420525() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"import java.util.concurrent.CompletableFuture;\n" +
"import java.util.concurrent.ExecutionException;\n" +
"public class X {\n" +
" void test(List<CompletableFuture<Integer>> futures) {\n" +
" CompletableFuture.allOf(futures.toArray(new CompletableFuture<?>[]{})).thenApplyAsync( (Void v) -> {\n" +
" Integer finalResult = futures.stream().map( (CompletableFuture<Integer> f) -> {\n" +
" try {\n" +
" return f.get();\n" +
" } catch (InterruptedException | ExecutionException e) {\n" +
" return 0;\n" +
" }\n" +
" }).reduce(0, Integer::sum);\n" +
" \n" +
" log(\"final result is \" + finalResult);\n" +
" if (finalResult != 50){\n" +
" throw new RuntimeException(\"FAILED\");\n" +
" } else{\n" +
" log(\"SUCCESS\");\n" +
" }\n" +
" \n" +
" return null;\n" +
" });\n" +
"\n" +
" }\n" +
" void log(String msg) {}\n" +
"}\n"
});
}
//https://bugs.eclipse.org/420525 - [1.8] [compiler] Incorrect error "The type Integer does not define sum(Object, Object) that is applicable here"
public void testBug420525_mini() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"import java.util.concurrent.CompletableFuture;\n" +
"import java.util.concurrent.ExecutionException;\n" +
"public class X {\n" +
" void test(List<CompletableFuture<Integer>> futures, boolean b) {\n" +
" Integer finalResult = futures.stream().map( (CompletableFuture<Integer> f) -> {\n" +
" if (b) \n" +
" return 1;\n" +
" else\n" +
" return Integer.valueOf(13);" +
" }).reduce(0, Integer::sum);\n" +
" }\n" +
"}\n"
});
}
// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=420525#c7
public void testBug420525a() {
runNegativeTest(
new String[] {
"Main.java",
"interface I<T> {\n" +
" T bold(T t);\n" +
"}\n" +
"\n" +
"class Main { \n" +
" public String foo(String x) { return \"<b>\" + x + \"</b>\"; }\n" +
" String bar() {\n" +
" I<? extends String> i = this::foo;\n" +
" return i.bold(\"1\");\n" +
" } \n" +
"}\n"
},
"----------\n" +
"1. ERROR in Main.java (at line 9)\n" +
" return i.bold(\"1\");\n" +
" ^^^^\n" +
"The method bold(capture#1-of ? extends String) in the type I<capture#1-of ? extends String> is not applicable for the arguments (String)\n" +
"----------\n");
}
public void testBug424415() {
runConformTest(
new String[] {
"X.java",
"\n" +
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"\n" +
"interface Functional<T> {\n" +
" T apply();\n" +
"}\n" +
"\n" +
"class X {\n" +
" void foo(Object o) { }\n" +
"\n" +
" <Q extends Collection<?>> Q goo(Functional<Q> s) {\n" +
" return null;\n" +
" } \n" +
"\n" +
" void test() {\n" +
" foo(goo(ArrayList<String>::new));\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=424415#c6
public void testBug424415b() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"\n" +
"interface Functional<T> {\n" +
" T apply();\n" +
"}\n" +
"\n" +
"class X {\n" +
" void foo(Object o) { }\n" +
" void foo(String str) {} \n" +
"\n" +
" <Q extends Collection<?>> Q goo(Functional<Q> s) {\n" +
" return null;\n" +
" } \n" +
"\n" +
" void test() {\n" +
" foo(goo(ArrayList<String>::new));\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=424415#c8
public void testBug424415c() {
runConformTest(
new String[] {
"com/example/MyEmployee.java",
"package com.example;\n" +
"class MyEmployee {\n" +
" \n" +
" public enum Gender { MALE, FEMALE, OTHERS }\n" +
"\n" +
" private int age = 0;\n" +
" private Gender gender = Gender.MALE;\n" +
" \n" +
" public MyEmployee(int age, Gender gender) {\n" +
" this.age = age;\n" +
" this.gender = gender;\n" +
" } \n" +
" \n" +
" public int getAge() {\n" +
" return age;\n" +
" }\n" +
" \n" +
" public Gender getGender() {\n" +
" return gender;\n" +
" }\n" +
"}",
"com/example/Test.java",
"package com.example;\n" +
"\n" +
"import java.util.List;\n" +
"import java.util.concurrent.ConcurrentMap;\n" +
"import java.util.stream.Collectors;\n" +
"\n" +
"public class Test {\n" +
"\n" +
" ConcurrentMap<MyEmployee.Gender, List<MyEmployee>> test(List<MyEmployee> el) {\n" +
" return el.parallelStream()\n" +
" .collect(\n" +
" Collectors.groupingByConcurrent(MyEmployee::getGender)\n" +
" );\n" +
" }\n" +
" \n" +
"}"
});
}
public void testBug424631() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"\n" +
"interface Functional<T> {\n" +
" T apply();\n" +
"}\n" +
"\n" +
"class X {\n" +
" void foo(Collection<String> o) { }\n" +
"\n" +
" <Q extends Collection<?>> Q goo(Functional<Q> s) {\n" +
" return null;\n" +
" } \n" +
"\n" +
" void test() { \n" +
" foo(goo(ArrayList<String>::new));\n" +
" }\n" +
"}\n"
});
}
public void testBug424403() {
runConformTest(
new String[] {
"X.java",
"interface Functional { int foo(); }\n" +
"\n" +
"public class X {\n" +
" static int bar() {\n" +
" return -1;\n" +
" }\n" +
" static <T> T consume(T t) { return null; }\n" +
"\n" +
" public static void main(String[] args) {\n" +
" Functional f = consume(X::bar);\n" +
" } \n" +
"}\n"
});
}
public void testBug401850a() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.List;\n" +
"import java.util.ArrayList;\n" +
"public class X<T> {\n" +
" X(T t) {}\n" +
" X(String s) {}\n" +
" int m(X<String> xs) { return 0; }\n" +
" int i = m(new X<>(\"\"));\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 7)\n" +
" int i = m(new X<>(\"\"));\n" +
" ^^^^^^^^^^^\n" +
"The constructor X<String>(String) is ambiguous\n" +
"----------\n");
}
public void testBug401850b() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.List;\n" +
"import java.util.ArrayList;\n" +
"public class X<T> {\n" +
" X(T t) {}\n" +
" X(String s) {}\n" +
" int m(X<String> xs) { return 0; }\n" +
" int i = m(new X<String>(\"\"));\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 7)\n" +
" int i = m(new X<String>(\"\"));\n" +
" ^^^^^^^^^^^^^^^^^\n" +
"The constructor X<String>(String) is ambiguous\n" +
"----------\n");
}
public void testBug424710() {
runConformTest(
new String[] {
"MapperTest.java",
"import java.util.ArrayList;\n" +
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"import java.util.regex.Matcher;\n" +
"import java.util.regex.Pattern;\n" +
"import java.util.stream.Stream;\n" +
"\n" +
"public class MapperTest {\n" +
"\n" +
" public static void main( String... argv ){\n" +
" List<String> data = Arrays.asList(\"abc\", \"123\", \"1a\", \"?!?\");\n" +
" List<Pattern> patterns = Arrays.asList(Pattern.compile(\"[a-z]+\"), Pattern.compile(\"[0-9]+\"));\n" +
" patterns.stream()\n" +
" .flatMap(\n" +
" p -> {\n" +
" Stream<Matcher> map = data.stream().map(p::matcher);\n" +
" Stream<Matcher> filter = map.filter(Matcher::find);\n" +
" Function<? super Matcher, ? extends Object> mapper = Matcher::group;\n" +
" mapper = matcher -> matcher.group();\n" +
" return filter.map(mapper);\n" +
" })\n" +
" .forEach(System.out::println);\n" +
" }\n" +
"}\n"
});
}
public void testBug424075() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Consumer<Object> c = null;\n" +
" Arrays.asList(pred(), c);\n" +
" }\n" +
"\n" +
" static <T> Predicate<T> pred() {\n" +
" return null;\n" +
" }\n" +
"}\n"
});
}
public void testBug424205a() {
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void bar(String t);\n" +
"}\n" +
"class X<T> implements I {\n" +
" public void bar(String t) {}\n" +
" X(String x) {}\n" +
" X(T x) {}\n" +
" public void one(X<I> c){}\n" +
" public void two() {\n" +
" X<I> i = new X<>((String s) -> { });\n" +
" one (i);\n" +
" }\n" +
"}\n"
});
}
public void testBug424205b() {
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" void bar(String t);\n" +
"}\n" +
"public class X<T> implements I {\n" +
" public void bar(String t) {}\n" +
" X(String x) {}\n" +
" X(T x) {}\n" +
" public void one(X<I> c){}\n" +
" public void two() {\n" +
" one(new X<>((String s) -> { })); // 1. Three errors\n" +
" X<I> i = new X<>((String s) -> { }); // 2. Error - Comment out the previous line to see this error go away.\n" +
" one (i);\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" System.out.println(\"main\");\n" +
" new X<Integer>(\"one\").two();\n" +
" }\n" +
"}\n"
},
"main");
}
public void testBug424712a() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.Collection;\n" +
"import java.util.function.Supplier;\n" +
"import java.util.Set;\n" +
"\n" +
"public class X {\n" +
" public static <T, SOURCE extends Collection<T>, DEST extends Collection<T>>\n" +
" DEST foo(SOURCE sourceCollection, DEST collectionFactory) {\n" +
" return null;\n" +
" } \n" +
" \n" +
" public static void main(String... args) {\n" +
" Set<Y> rosterSet = (Set<Y>) foo(null, Set::new);\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 12)\n" +
" Set<Y> rosterSet = (Set<Y>) foo(null, Set::new);\n" +
" ^\n" +
"Y cannot be resolved to a type\n" +
"----------\n" +
"2. ERROR in X.java (at line 12)\n" +
" Set<Y> rosterSet = (Set<Y>) foo(null, Set::new);\n" +
" ^\n" +
"Y cannot be resolved to a type\n" +
"----------\n" +
"3. ERROR in X.java (at line 12)\n" +
" Set<Y> rosterSet = (Set<Y>) foo(null, Set::new);\n" +
" ^^^^^^^^\n" +
"The target type of this expression must be a functional interface\n" +
"----------\n" +
"4. ERROR in X.java (at line 12)\n" +
" Set<Y> rosterSet = (Set<Y>) foo(null, Set::new);\n" +
" ^^^\n" +
"Cannot instantiate the type Set\n" +
"----------\n");
}
public void testBug424712b() {
runConformTest(
new String[] {
"X.java",
"import java.util.Comparator;\n" +
"public class X {\n" +
" <T> void test() {\n" +
" Comparator<? super T> comparator = (Comparator<? super T>) Comparator.naturalOrder();\n" +
" System.out.println(\"OK\");\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" new X().test();\n" +
" }\n" +
"}\n"
},
"OK");
}
public void testBug425142_minimal() {
runNegativeTest(
new String[] {
"SomethingBreaks.java",
"import java.io.IOException;\n" +
"import java.nio.file.Files;\n" +
"import java.nio.file.Paths;\n" +
"import java.util.function.Consumer;\n" +
"\n" +
"@FunctionalInterface interface Use<T, E extends Throwable> { void accept(T t) throws E; }\n" +
"\n" +
"@SuppressWarnings(\"unused\") public class SomethingBreaks<T, E extends Throwable> {\n" +
" protected static SomethingBreaks<String, IOException> stream() { return null; }\n" +
"\n" +
" public void forEach(Consumer<T> use) throws E {}\n" +
"\n" +
" public <E2 extends E> void forEach(Use<T, E2> use) throws E, E2 {}\n" +
"\n" +
" private static void methodReference(String s) throws IOException {\n" +
" System.out.println(Files.size(Paths.get(s)));\n" +
" }\n" +
" \n" +
" public static void useCase9() throws IOException {\n" +
" stream().forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in SomethingBreaks.java (at line 20)\n" +
" stream().forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" ^^^^^^^\n" +
"The method forEach(Consumer<String>) is ambiguous for the type SomethingBreaks<String,IOException>\n" +
"----------\n");
}
public void testBug425142_full() {
runNegativeTest(
new String[] {
"SomethingBreaks.java",
"import java.io.IOException;\n" +
"import java.nio.file.Files;\n" +
"import java.nio.file.Paths;\n" +
"import java.util.function.Consumer;\n" +
"\n" +
"@FunctionalInterface interface Use<T, E extends Throwable> { void accept(T t) throws E; }\n" +
"\n" +
"@SuppressWarnings(\"unused\") public class SomethingBreaks<T, E extends Throwable> {\n" +
" protected static SomethingBreaks<String, IOException> stream() { return null; }\n" +
"\n" +
" public void forEach(Consumer<T> use) throws E {}\n" +
"\n" +
" public <E2 extends E> void forEach(Use<T, E2> use) throws E, E2 {}\n" +
"\n" +
" private static void methodReference(String s) throws IOException {\n" +
" System.out.println(Files.size(Paths.get(s)));\n" +
" }\n" +
" \n" +
" public static void useCase1() throws IOException {\n" +
" Use<String, IOException> c =\n" +
" (String s) -> System.out.println(Files.size(Paths.get(s)));\n" +
" stream().forEach(c);\n" +
" }\n" +
" \n" +
" public static void useCase2() throws IOException {\n" +
" Use<String, IOException> c = SomethingBreaks::methodReference;\n" +
" stream().forEach(c);\n" +
" }\n" +
" \n" +
" public static void useCase3() throws IOException {\n" +
" stream().forEach((Use<String, IOException>) (String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" }\n" +
" \n" +
" public static void useCase4() throws IOException {\n" +
" stream().forEach((Use<String, IOException>) SomethingBreaks::methodReference);\n" +
" }\n" +
" \n" +
" public static void useCase5() throws IOException {\n" +
" stream().<IOException> forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" }\n" +
" \n" +
" public static void useCase6() throws IOException {\n" +
" stream().<IOException> forEach(SomethingBreaks::methodReference);\n" +
" }\n" +
" \n" +
" public static void useCase7() throws IOException {\n" +
" stream().<Use<String, IOException>> forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" }\n" +
" \n" +
" public static void useCase8() throws IOException {\n" +
" stream().<Use<String, IOException>> forEach(SomethingBreaks::methodReference);\n" +
" }\n" +
" \n" +
" public static void useCase9() throws IOException {\n" +
" stream().forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" }\n" +
" \n" +
" public static void useCase10() throws IOException {\n" +
" stream().forEach(SomethingBreaks::methodReference);\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in SomethingBreaks.java (at line 39)\n" +
" stream().<IOException> forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" ^^^^^^^\n" +
"The method forEach(Consumer<String>) is ambiguous for the type SomethingBreaks<String,IOException>\n" +
"----------\n" +
"2. ERROR in SomethingBreaks.java (at line 43)\n" +
" stream().<IOException> forEach(SomethingBreaks::methodReference);\n" +
" ^^^^^^^\n" +
"The method forEach(Consumer<String>) is ambiguous for the type SomethingBreaks<String,IOException>\n" +
"----------\n" +
"3. ERROR in SomethingBreaks.java (at line 43)\n" +
" stream().<IOException> forEach(SomethingBreaks::methodReference);\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Unhandled exception type IOException\n" +
"----------\n" +
"4. ERROR in SomethingBreaks.java (at line 47)\n" +
" stream().<Use<String, IOException>> forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Unhandled exception type IOException\n" +
"----------\n" +
"5. ERROR in SomethingBreaks.java (at line 51)\n" +
" stream().<Use<String, IOException>> forEach(SomethingBreaks::methodReference);\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Unhandled exception type IOException\n" +
"----------\n" +
"6. ERROR in SomethingBreaks.java (at line 55)\n" +
" stream().forEach((String s) -> System.out.println(Files.size(Paths.get(s))));\n" +
" ^^^^^^^\n" +
"The method forEach(Consumer<String>) is ambiguous for the type SomethingBreaks<String,IOException>\n" +
"----------\n" +
"7. ERROR in SomethingBreaks.java (at line 59)\n" +
" stream().forEach(SomethingBreaks::methodReference);\n" +
" ^^^^^^^\n" +
"The method forEach(Consumer<String>) is ambiguous for the type SomethingBreaks<String,IOException>\n" +
"----------\n" +
"8. ERROR in SomethingBreaks.java (at line 59)\n" +
" stream().forEach(SomethingBreaks::methodReference);\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Unhandled exception type IOException\n" +
"----------\n");
}
public void testBug424195a() {
runNegativeTestMultiResult(
new String[] {
"NPEOnCollector.java",
"import java.io.IOException;\n" +
"import java.nio.file.Path;\n" +
"import java.util.ArrayList;\n" +
"import java.util.function.Function;\n" +
"import java.util.function.Predicate;\n" +
"import java.util.jar.JarEntry;\n" +
"import java.util.jar.JarFile;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.Stream;\n" +
"\n" +
"\n" +
"public class NPEOnCollector {\n" +
" static void processJar(Path plugin) throws IOException {\n" +
" \n" +
" try(JarFile jar = new JarFile(plugin.toFile())) {\n" +
" try(Stream<JarEntry> entries = jar.stream()) {\n" +
" Stream<JarEntry> stream = entries\n" +
" .distinct().collect(Collectors.toCollection(ArrayList::new));\n" +
" \n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
},
null,
new String[] {
"----------\n" +
"1. ERROR in NPEOnCollector.java (at line 17)\n" +
" Stream<JarEntry> stream = entries\n" +
" .distinct().collect(Collectors.toCollection(ArrayList::new));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from Collection<JarEntry> to Stream<JarEntry>\n" +
"----------\n",
"----------\n" +
"1. ERROR in NPEOnCollector.java (at line 18)\n" +
" .distinct().collect(Collectors.toCollection(ArrayList::new));\n" +
" ^^^^^^^^^^^^^^\n" +
"The constructed object of type ArrayList is incompatible with the descriptor\'s return type: Stream<JarEntry>&Collection<T#2>&Collection<JarEntry>\n" +
"----------\n"
});
}
public void testBug424195b() {
runConformTest(
new String[] {
"NPEOnCollector.java",
"import java.io.IOException;\n" +
"import java.nio.file.Path;\n" +
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"import java.util.function.Function;\n" +
"import java.util.function.Predicate;\n" +
"import java.util.jar.JarEntry;\n" +
"import java.util.jar.JarFile;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.Stream;\n" +
"\n" +
"\n" +
"public class NPEOnCollector {\n" +
" static void processJar(Path plugin) throws IOException {\n" +
" \n" +
" try(JarFile jar = new JarFile(plugin.toFile())) {\n" +
" try(Stream<JarEntry> entries = jar.stream()) {\n" +
" Collection<JarEntry> collection = entries\n" +
" .distinct().collect(Collectors.toCollection(ArrayList::new));\n" +
" \n" +
" }\n" +
" }\n" +
" }\n" +
"}\n"
});
}
public void testBug424195_comment2() {
runConformTest(
new String[] {
"X.java",
"import java.io.PrintStream;\n" +
"import java.util.ArrayList;\n" +
"import java.util.stream.Collectors;\n" +
"import java.util.stream.*;\n" +
"public class X {\n" +
"\n" +
" public static void main(String argv[]) {\n" +
" ArrayList<Integer> al = IntStream\n" +
" .range(0, 10_000)\n" +
" .boxed()\n" +
" .collect(Collectors.toCollection(ArrayList::new));\n" +
"\n" +
" }\n" +
"}\n"
});
}
public void testBug425153() {
runNegativeTest(
new String[] {
"Main.java",
"class C1 {}\n" +
"class C2 {}\n" +
"\n" +
"interface I<P1 extends C1, P2 extends P1> {\n" +
" P2 foo(P1 p1);\n" +
"}\n" +
"\n" +
"public class Main {\n" +
" public static void main(String argv[]) {\n" +
" I<?, ?> i = (C1 c1) -> { return new C2(); };\n" +
" Object c2 = i.foo(null);\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Main.java (at line 10)\n" +
" I<?, ?> i = (C1 c1) -> { return new C2(); };\n" +
" ^^^^^^^^^^\n" +
"The target type of this expression is not a well formed parameterized type due to bound(s) mismatch\n" +
"----------\n");
}
public void testBug424845() {
runConformTest(
new String[] {
"Test.java",
"import java.util.ArrayList;\n" +
"import java.util.Collections;\n" +
"import java.util.Comparator;\n" +
"import java.util.List;\n" +
"\n" +
"public class Test {\n" +
" \n" +
"\n" +
" interface Function<K, V>{\n" +
" public V apply(K orig);\n" +
" }\n" +
" \n" +
" \n" +
" static class Ordering<O> {\n" +
"\n" +
" public <K> Comparator<K> onResultOf(Function<K, ? extends O> function) {\n" +
" return null;\n" +
" }\n" +
"\n" +
" \n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" List<Object> list = new ArrayList<>();\n" +
" Function<Object, String> function = new Function<Object, String>() {\n" +
" public String apply(Object arg0) {\n" +
" return arg0.toString();\n" +
" }\n" +
" };\n" +
" Ordering<Comparable<String>> natural = new Ordering<>();\n" +
" Collections.sort(list, natural.onResultOf(function));\n" +
" }\n" +
" \n" +
"}\n"
});
}
public void testBug425278() {
runConformTest(
new String[] {
"X.java",
"interface I<T, S extends X<T>> { \n" +
" T foo(S p);\n" +
"}\n" +
"\n" +
"public class X<T> {\n" +
" public void bar() {\n" +
" I<Object, X<Object>> f = (p) -> p; // Error\n" +
" }\n" +
"}\n"
});
}
public void testBug425783() {
runConformTest(
new String[] {
"Test.java",
"class MyType<S extends MyType<S>> {\n" +
" S myself() { return (S)this; }\n" +
"}\n" +
"public class Test {\n" +
" MyType test() {\n" +
" return newInstance().myself();\n" +
" }\n" +
" MyType test2() {\n" +
" return newInstance().myself();\n" +
" }\n" +
" public <T extends MyType> T newInstance() {\n" +
" return (T) new MyType();\n" +
" }" +
"}\n"
});
}
public void testBug425798() {
runConformTest(
new String[] {
"X.java",
"import java.lang.annotation.*;\n" +
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"import java.util.stream.*;\n" +
"interface MyCollector<T, A, R> extends Collector<T, A, R> {\n" +
"}\n" +
"public abstract class X {\n" +
" abstract <T, K, U, M extends Map<K, U>>\n" +
" MyCollector<T, ?, M> toMap(Function<? super T, ? extends K> km,\n" +
" BinaryOperator<U> mf);" +
" void test(Stream<Annotation> annotations) {\n" +
" annotations\n" +
" .collect(toMap(Annotation::annotationType,\n" +
" (first, second) -> first));\n" +
" }\n" +
"}\n"
},
"");
}
public void testBug425798a() {
runConformTest(
new String[] {
"X.java",
"import java.lang.annotation.*;\n" +
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"import java.util.stream.*;\n" +
"interface MyCollector<T, A, R> extends Collector<T, A, R> {\n" +
"}\n" +
"public abstract class X {\n" +
" abstract <T, K, U, M extends Map<K, U>>\n" +
" MyCollector<T, ?, M> toMap(Function<? super T, ? extends K> km,\n" +
" BinaryOperator<U> mf);" +
" void test(Stream<Annotation> annotations) {\n" +
" annotations\n" +
" .collect(toMap(true ? Annotation::annotationType : Annotation::annotationType,\n" +
" (first, second) -> first));\n" +
" }\n" +
"}\n"
},
"");
}
// witness for NPE mentioned in https://bugs.eclipse.org/bugs/show_bug.cgi?id=425798#c2
public void testBug425798b() {
runConformTest(
new String[] {
"X.java",
"import java.util.Objects;\n" +
"import java.util.PrimitiveIterator;\n" +
"import java.util.Spliterator;\n" +
"import java.util.Spliterator.OfInt;\n" +
"import java.util.function.Consumer;\n" +
"import java.util.function.IntConsumer;\n" +
"\n" +
"class IntIteratorSpliterator implements OfInt {\n" +
" public IntIteratorSpliterator(PrimitiveIterator.OfInt arg) { }\n" +
" public void forEachRemaining(IntConsumer action) { }\n" +
" public boolean tryAdvance(Consumer<? super Integer> action) { return false; }\n" +
" public long estimateSize() { return 0; }\n" +
" public int characteristics() { return 0; }\n" +
" public OfInt trySplit() { return null; }\n" +
" public boolean tryAdvance(IntConsumer action) { return false; }\n" +
"}\n" +
"public class X {\n" +
"\n" +
" public Spliterator.OfInt spliterator(PrimitiveIterator.OfInt iterator) {\n" +
" return new IntIteratorSpliterator(id(iterator));\n" +
" }\n" +
" <T> T id(T e) { return e; }\n" +
"}\n"
});
}
public void testBug425460orig() {
runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"public class X {\n" +
" final Integer[] boom =\n" +
" Arrays.asList(\"1\", \"22\", \"333\")\n" +
" .stream()\n" +
" .map(str -> str.length())\n" +
" .toArray(i -> new Integer[i]);\n" +
"}\n"
});
}
public void testBug425460variant() {
runConformTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"public class X {\n" +
" final Integer[] boom =\n" +
" Arrays.asList(\"1\", \"22\", \"333\")\n" +
" .stream()\n" +
" .map(str -> str.length())\n" +
" .toArray((int i) -> new Integer[i]);\n" +
"}\n"
});
}
public void testBug425951() {
runNegativeTest(
new String[] {
"Test.java",
"import java.util.List;\n" +
"\n" +
"public class Test {\n" +
"\n" +
" public static void main(String[] args) {\n" +
" index(new A().test());\n" +
" }\n" +
"\n" +
" public static <X> void index(Iterable<X> collection)\n" +
" {\n" +
" }\n" +
" \n" +
" public class A<S extends A<S>>\n" +
" {\n" +
" protected A() {}\n" +
" \n" +
" public <T> List<T> test()\n" +
" {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. WARNING in Test.java (at line 6)\n" +
" index(new A().test());\n" +
" ^^^^^^^^^^^^^^^^^^^^^\n" +
"Type safety: Unchecked invocation index(List) of the generic method index(Iterable<X>) of type Test\n" +
"----------\n" +
"2. WARNING in Test.java (at line 6)\n" +
" index(new A().test());\n" +
" ^^^^^^^^^^^^^^\n" +
"Type safety: The expression of type List needs unchecked conversion to conform to Iterable<Object>\n" +
"----------\n" +
"3. ERROR in Test.java (at line 6)\n" +
" index(new A().test());\n" +
" ^^^^^^^\n" +
"No enclosing instance of type Test is accessible. Must qualify the allocation with an enclosing instance of type Test (e.g. x.new A() where x is an instance of Test).\n" +
"----------\n" +
"4. WARNING in Test.java (at line 6)\n" +
" index(new A().test());\n" +
" ^\n" +
"Test.A is a raw type. References to generic type Test.A<S> should be parameterized\n" +
"----------\n");
}
public void testBug425951a() {
runConformTest(
new String[] {
"Test.java",
"import java.util.List;\n" +
"\n" +
"public class Test {\n" +
"\n" +
" public void test() {\n" +
" index(new A().test());\n" +
" }\n" +
"\n" +
" public static <X> void index(Iterable<X> collection)\n" +
" {\n" +
" }\n" +
" \n" +
" public class A<S extends A<S>>\n" +
" {\n" +
" protected A() {}\n" +
" \n" +
" public <T> List<T> test()\n" +
" {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"}\n"
});
}
public void testBug424906() {
runConformTest(
new String[] {
"Main.java",
"public class Main {\n" +
" public <T> void test(Result r) {}\n" +
"\n" +
" public static void main(String[] args) {\n" +
" new Main().test(r -> System.out.println(\"Hmmm...\" + r));\n" +
" }\n" +
"}\n" +
"\n" +
"interface Result {\n" +
" public void result(Object object);\n" +
"}"
});
}
public void testBug425156() {
runConformTest(
new String[] {
"X.java",
"interface I<T> {\n" +
" void foo(T t);\n" +
"}\n" +
"public class X {\n" +
" void bar(I<?> i) {\n" +
" i.foo(null);\n" +
" }\n" +
" void run() {\n" +
" bar((X x) -> {}); // Incompatible error reported\n" +
" }\n" +
"}\n"
});
}
public void testBug425493() {
runNegativeTest(
new String[] {
"Test.java",
"public class Test {\n" +
" public void addAttributeBogus(Attribute<?> attribute) {\n" +
" addAttribute(java.util.Objects.requireNonNull(attribute, \"\"),\n" +
" attribute.getDefault());\n" +
" addAttribute(attribute, attribute.getDefault());\n" +
" }\n" +
" public <T> void addAttributeOK(Attribute<T> attribute) {\n" +
" addAttribute(java.util.Objects.requireNonNull(attribute, \"\"),\n" +
" attribute.getDefault());\n" +
" addAttribute(attribute, attribute.getDefault());\n" +
" }\n" +
"\n" +
" private <T> void addAttribute(Attribute<T> attribute, T defaultValue) {}\n" +
"\n" +
" static class Attribute<T> {\n" +
"\n" +
" T getDefault() {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Test.java (at line 3)\n" +
" addAttribute(java.util.Objects.requireNonNull(attribute, \"\"),\n" +
" ^^^^^^^^^^^^\n" +
"The method addAttribute(Test.Attribute<T>, T) in the type Test is not applicable for the arguments (Test.Attribute<capture#1-of ?>, capture#2-of ?)\n" +
"----------\n" +
"2. ERROR in Test.java (at line 5)\n" +
" addAttribute(attribute, attribute.getDefault());\n" +
" ^^^^^^^^^^^^\n" +
"The method addAttribute(Test.Attribute<T>, T) in the type Test is not applicable for the arguments (Test.Attribute<capture#3-of ?>, capture#4-of ?)\n" +
"----------\n");
}
public void testBug426366() {
runConformTest(
new String[] {
"a/Test.java",
"package a;\n" +
"\n" +
"import java.util.Collections;\n" +
"import java.util.List;\n" +
"\n" +
"/**\n" +
" * @author tomschindl\n" +
" *\n" +
" */\n" +
"public class Test {\n" +
" public static class A {\n" +
" public A(B newSelectedObject, String editorController) {\n" +
" }\n" +
"\n" +
" public A(List<B> newSelectedObjects, String editorController) {\n" +
" }\n" +
" }\n" +
" \n" +
" public static class B {\n" +
" \n" +
" }\n" +
" \n" +
" public static class C extends A {\n" +
" public C() {\n" +
" super(Collections.emptyList(), \"\");\n" +
" }\n" +
" }\n" +
"}\n"
});
}
public void testBug426290() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayList;\n" +
"import java.util.List;\n" +
"\n" +
"public class X {\n" +
" public static void main(String argv[]) {\n" +
" goo(foo());\n" +
" }\n" +
"\n" +
" static <T extends Number> List<T> foo() {\n" +
" return new ArrayList<T>();\n" +
" }\n" +
"\n" +
" static void goo(Object p1) {\n" +
" System.out.println(\"goo(Object)\");\n" +
" }\n" +
"\n" +
" static void goo(List<Integer> p1) {\n" +
" System.out.println(\"goo(List<Integer>)\");\n" +
" }\n" +
"}\n"
},
"goo(List<Integer>)");
}
public void testBug425152() {
runConformTest(
new String[] {
"packDown/SorterNew.java",
"package packDown;\n" +
"\n" +
"import java.util.ArrayList;\n" +
"import java.util.Collections;\n" +
"import java.util.Comparator;\n" +
"\n" +
"public class SorterNew {\n" +
" void sort() {\n" +
" Collections.sort(new ArrayList<Person>(),\n" +
" Comparator.comparing((Person p) -> p.getName()));\n" +
" }\n" +
"}\n" +
"\n" +
"class Person {\n" +
" public String getName() {\n" +
" return \"p\";\n" +
" }\n" +
"}\n"
});
}
public void testBug426048() {
runNegativeTest(
new String[] {
"MyFunction.java",
"import java.lang.annotation.Annotation;\n" +
"import java.lang.annotation.ElementType;\n" +
"import java.lang.annotation.Target;\n" +
"\n" +
"@Target(ElementType.TYPE_USE)\n" +
"@interface Throws {\n" +
" Class<? extends Throwable>[] value() default Throwable.class;\n" +
" Returns method() default @Returns(Annotation.class);\n" +
"}\n" +
"\n" +
"@Target(ElementType.TYPE_USE)\n" +
"@interface Returns {\n" +
" Class<? extends Annotation> value() default Annotation.class;\n" +
"}\n" +
"\n" +
"@FunctionalInterface public interface MyFunction<T, @Returns R> {\n" +
" @Returns R apply(T t);\n" +
"\n" +
" default <V> @Throws(((MyFunction<? super V, ? extends T>) before::apply) @Returns MyFunction<V, @Returns R>\n" +
" compose(MyFunction<? super V, ? extends T> before) {\n" +
"\n" +
" return (V v) -> apply(before.apply(v));\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in MyFunction.java (at line 19)\n" +
" default <V> @Throws(((MyFunction<? super V, ? extends T>) before::apply) @Returns MyFunction<V, @Returns R>\n" +
" ^\n" +
"Syntax error, insert \"Type Identifier (\" to complete MethodHeaderName\n" +
"----------\n" +
"2. ERROR in MyFunction.java (at line 19)\n" +
" default <V> @Throws(((MyFunction<? super V, ? extends T>) before::apply) @Returns MyFunction<V, @Returns R>\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from MyFunction<capture#1-of ? super V,capture#2-of ? extends T> to Class<? extends Throwable>[]\n" +
"----------\n" +
"3. ERROR in MyFunction.java (at line 19)\n" +
" default <V> @Throws(((MyFunction<? super V, ? extends T>) before::apply) @Returns MyFunction<V, @Returns R>\n" +
" ^^^^^^\n" +
"before cannot be resolved\n" +
"----------\n" +
"4. ERROR in MyFunction.java (at line 19)\n" +
" default <V> @Throws(((MyFunction<? super V, ? extends T>) before::apply) @Returns MyFunction<V, @Returns R>\n" +
" ^\n" +
"Syntax error, insert \")\" to complete Modifiers\n" +
"----------\n" +
"5. ERROR in MyFunction.java (at line 20)\n" +
" compose(MyFunction<? super V, ? extends T> before) {\n" +
" ^\n" +
"Syntax error on token \"(\", , expected\n" +
"----------\n");
}
public void testBug426540() {
runConformTest(
new String[] {
"X.java",
"import java.util.stream.Stream;\n" +
"import java.util.Collections;\n" +
"import static java.util.stream.Collectors.collectingAndThen;\n" +
"import static java.util.stream.Collectors.toList;\n" +
"public class X {\n" +
" Object o = ((Stream<Integer>) null).collect(collectingAndThen(toList(), Collections::unmodifiableList));\n" +
"}\n"
});
}
public void testBug426671_ok() {
runConformTest(
new String[] {
"X.java",
"import java.util.stream.Stream;\n" +
"import java.util.*;\n" +
"import static java.util.stream.Collectors.collectingAndThen;\n" +
"import static java.util.stream.Collectors.toList;\n" +
"public class X {\n" +
" void test(Stream<List<Integer>> stream) {\n" +
" stream.collect(collectingAndThen(toList(), Collections::<List<Integer>>unmodifiableList))\n" +
" .remove(0);\n" +
" }\n" +
"}\n"
});
}
public void testBug426671_medium() {
runConformTest(
new String[] {
"X.java",
"import java.util.stream.Stream;\n" +
"import java.util.*;\n" +
"import static java.util.stream.Collectors.collectingAndThen;\n" +
"import static java.util.stream.Collectors.toList;\n" +
"public class X {\n" +
" void test(Stream<List<Integer>> stream) {\n" +
" stream.collect(collectingAndThen(toList(), Collections::unmodifiableList))\n" +
" .remove(0);\n" +
" }\n" +
"}\n"
});
}
public void testBug426671_full() {
runConformTest(
new String[] {
"X.java",
"import java.util.stream.Stream;\n" +
"import java.util.*;\n" +
"import static java.util.stream.Collectors.collectingAndThen;\n" +
"import static java.util.stream.Collectors.toList;\n" +
"public class X {\n" +
" void test() {\n" +
" Arrays.asList((List<Integer>) null).stream().collect(collectingAndThen(toList(), Collections::unmodifiableList))\n" +
" .remove(0);\n" +
" }\n" +
"}\n"
});
}
public void testBug426671b() {
runNegativeTest(
new String[] {
"Test.java",
"interface I<X,Y> {\n" +
" Y fun(X y);\n" +
"}\n" +
"public class Test {\n" +
" static <S> S id(S s) { return s; }\n" +
" void test() {\n" +
" m1(Test::id, \"Hi\");\n" +
" m2(Test::id, \"Hi\").toUpperCase();\n" +
" m3(Test::id, \"Hi\").toUpperCase();\n" +
" }\n" +
"\n" +
" <U,V> void m1(I<V,U> i, U u) { }\n" +
" <U,V> V m2(I<V,U> i, U u) {\n" +
" return null;\n" +
" }\n" +
" <U,V> V m3(I<U,V> i, U u) {\n" +
" return null;\n" +
" }\n" +
"}"
},
"----------\n" +
"1. ERROR in Test.java (at line 8)\n" +
" m2(Test::id, \"Hi\").toUpperCase();\n" +
" ^^^^^^^^^^^\n" +
"The method toUpperCase() is undefined for the type Object\n" +
"----------\n");
}
public void testBug426652() {
runConformTest(
new String[] {
"X.java",
"import static java.util.stream.Collectors.toList;\n" +
"public class X {\n" +
" Object o = toList();\n" +
"}\n"
});
}
public void testBug426778() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" void test(List<CourseProviderEmploymentStatistics> result) {\n" +
" Collections.sort( result, \n" +
" Comparator.comparingInt(\n" +
" (CourseProviderEmploymentStatistics stat) -> stat.doneTrainingsTotal\n" +
" )\n" +
" .reversed()\n" +
" .thenComparing(\n" +
" (CourseProviderEmploymentStatistics stat) -> stat.courseProviderName ) );\n" +
" }\n" +
"}\n" +
"class CourseProviderEmploymentStatistics {\n" +
" int doneTrainingsTotal;\n" +
" String courseProviderName;\n" +
"}\n"
});
}
public void testBug426676() {
runConformTest(
new String[] {
"Test.java",
"import java.util.Arrays;\n" +
"import java.util.function.Supplier;\n" +
"import java.util.stream.Stream;\n" +
"\n" +
"\n" +
"public class Test {\n" +
" public static void main(String[] args) throws Exception {\n" +
" // Type inference works on map call.\n" +
" Stream<String> s1 =\n" +
" Arrays.stream(new Integer[] { 1, 2 })\n" +
" .map(i -> i.toString());\n" +
" \n" +
" // Type inference doesn't work on map call.\n" +
" Stream<String> s2 =\n" +
" Arrays.stream(new Integer[] { 1, 2 })\n" +
" .map(i -> i.toString())\n" +
" .distinct();\n" +
" }\n" +
"}\n"
});
}
public void testBug424591_comment20() {
runConformTest(
new String[] {
"MyList.java",
"import java.util.Arrays;\n" +
"public class MyList {\n" +
" protected Object[] elements;\n" +
" private int size;\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" public <A> A[] toArray(A[] a) {\n" +
" return (A[]) Arrays.copyOf(elements, size, a.getClass());\n" +
" }\n" +
"}\n"
});
}
public void testBug424591_comment20_variant() {
runNegativeTest(
new String[] {
"MyList.java",
"import java.util.Arrays;\n" +
"public class MyList {\n" +
" protected Object[] elements;\n" +
" private int size;\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" public <A> A[] toArray(A[] a) {\n" +
" return (A[]) Arrays.copyOf(elements, size, getClass());\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in MyList.java (at line 7)\n" +
" return (A[]) Arrays.copyOf(elements, size, getClass());\n" +
" ^^^^^^\n" +
"The method copyOf(U[], int, Class<? extends T[]>) in the type Arrays is not applicable for the arguments (Object[], int, Class<capture#1-of ? extends MyList>)\n" +
"----------\n");
}
public void testBug424591_comment22() {
runConformTest(
new String[] {
"Test.java",
"import java.util.*;\n" +
"public class Test {\n" +
" public static void main(String[] args) {\n" +
" Test.forObject(new HashSet<>());\n" +
" }\n" +
" public static Test forObject(Object o) {\n" +
" return null;\n" +
" }\n" +
"}\n"
});
}
public void testBug425063() {
runConformTest(
new String[] {
"ComparatorUse.java",
"import java.util.Comparator;\n" +
"public class ComparatorUse {\n" +
" Comparator<String> c =\n" +
" Comparator.comparing((String s)->s.toString())\n" +
" .thenComparing(s -> s.length());\n" +
"}\n"
});
}
public void testBug426764() {
runConformTest(
new String[] {
"X.java",
"interface I {}\n" +
"class C1 implements I {}\n" +
"class C2 implements I {}\n" +
"public class X {\n" +
" <T > void foo(T p1, I p2) {}\n" +
" <T extends I> void foo(T p1, I p2) {}\n" +
" void bar() {\n" +
" foo(true ? new C1(): new C2(), false ? new C2(): new C1());\n" +
" foo(new C1(), false ? new C2(): new C1());\n" +
" }\n" +
"}\n"
});
}
// simplest: avoid any grief concerning dequeCapacity:
public void testBug424930a() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayDeque;\n" +
"import java.util.Deque;\n" +
"import java.util.function.Supplier;\n" +
"\n" +
"public class X<S, T extends Deque<S>> {\n" +
" private final Supplier<T> supplier;\n" +
"\n" +
" public X(Supplier<T> supplier) {\n" +
" this.supplier = supplier;\n" +
" }\n" +
" \n" +
" int dequeCapacity;\n" +
" public static <S> X<S, Deque<S>> newDefaultMap() {\n" +
" return new X<>(() -> new ArrayDeque<>(13));\n" +
" }\n" +
"}\n"
});
}
// original test:
public void testBug424930b() {
runConformTest(
new String[] {
"X.java",
"import java.util.ArrayDeque;\n" +
"import java.util.Deque;\n" +
"import java.util.function.Supplier;\n" +
"\n" +
"public class X<S, T extends Deque<S>> {\n" +
" private final Supplier<T> supplier;\n" +
"\n" +
" public X(Supplier<T> supplier) {\n" +
" this.supplier = supplier;\n" +
" }\n" +
" \n" +
" public static <S> X<S, Deque<S>> newDefaultMap(int dequeCapacity) {\n" +
" return new X<>(() -> new ArrayDeque<>(dequeCapacity));\n" +
" }\n" +
"}\n"
});
}
// witness for an NPE during experiments
public void testBug424930c() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.ArrayDeque;\n" +
"import java.util.Deque;\n" +
"import java.util.function.Supplier;\n" +
"\n" +
"public class X<S, T extends Deque<S>> {\n" +
" private final Supplier<T> supplier;\n" +
"\n" +
" public X(Supplier<T> supplier) {\n" +
" this.supplier = supplier;\n" +
" }\n" +
" \n" +
" int dequeCapacity;\n" +
" public static <S> X<S, Deque<S>> newDefaultMap() {\n" +
" return new X<>(() -> new ArrayDeque<>(dequeCapacity));\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 14)\n" +
" return new X<>(() -> new ArrayDeque<>(dequeCapacity));\n" +
" ^^^^^^^^^^^^^\n" +
"Cannot make a static reference to the non-static field dequeCapacity\n" +
"----------\n");
}
public void testBug426998a() {
runConformTest(
new String[] {
"Snippet.java",
"public class Snippet {\n" +
" static void call(Class type, long init) {\n" +
" String string = new String();\n" +
" method(type, init == 0 ? new String() : string);\n" +
" }\n" +
" private static void method(Class type, String s) {}\n" +
"}\n"
});
}
// from https://bugs.eclipse.org/bugs/show_bug.cgi?id=426764#c5
public void testBug426998b() {
runConformTest(
new String[] {
"Snippet.java",
"public class Snippet {\n" +
" private static final String PLACEHOLDER_MEMORY = new String();\n" +
"\n" +
" static void newInstance(Class type, long init) {\n" +
" method(type, init == 0 ? new String() : PLACEHOLDER_MEMORY);\n" +
" }\n" +
"\n" +
" private static void method(Class type, String str) {}\n" +
"}\n"
});
}
public void testBug427164() {
runNegativeTest(
new String[] {
"NNLambda.java",
"import java.util.*;\n" +
"\n" +
"@FunctionalInterface\n" +
"interface FInter {\n" +
" String allToString(List<String> input);\n" +
"}\n" +
"\n" +
"public abstract class NNLambda {\n" +
" abstract <INP> void printem(FInter conv, INP single);\n" +
" \n" +
" void test() {\n" +
" printem((i) -> {\n" +
" Collections.<String>singletonList(\"const\")\n" +
" }, \n" +
" \"single\");\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in NNLambda.java (at line 13)\n" +
" Collections.<String>singletonList(\"const\")\n" +
" ^\n" +
"Syntax error, insert \";\" to complete BlockStatements\n" +
"----------\n",
true); // statement recovery
}
public void testBug427168() {
runNegativeTest(
new String[] {
"X.java",
"interface Producer<T> {\n" +
" <P> P produce();\n" +
"}\n" +
"public class X {\n" +
" <T> void perform(Producer<T> r) { }\n" +
" void test() {\n" +
" perform(() -> 13); \n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in X.java (at line 7)\n" +
" perform(() -> 13); \n" +
" ^^^^^^^\n" +
"The method perform(Producer<T>) in the type X is not applicable for the arguments (() -> 13)\n" +
"----------\n" +
"2. ERROR in X.java (at line 7)\n" +
" perform(() -> 13); \n" +
" ^^^^^^^^\n" +
"Illegal lambda expression: Method produce of type Producer<T> is generic \n" +
"----------\n");
}
public void testBug427196() {
runConformTest(
new String[] {
"MainTest.java",
"import java.util.ArrayList;\n" +
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.function.Function;\n" +
"\n" +
"public class MainTest {\n" +
" public static <T> List<T> copyOf (Collection<T> c) {\n" +
" return new ArrayList<>(c);\n" +
" }\n" +
" \n" +
" public static <T> List<T> copyOf (Iterable<T> c) {\n" +
" return new ArrayList<>();\n" +
" }\n" +
" \n" +
" public static void main (String[] args) {\n" +
" Function<Collection<String>, List<String>> function1 = c -> MainTest.copyOf(c); //OK\n" +
" Function<Collection<String>, List<String>> function2 = MainTest::copyOf; //error\n" +
" }\n" +
"}\n"
});
}
public void testBug427224() {
runConformTest(
new String[] {
"Test2.java",
"import java.util.*;\n" +
"public class Test2 {\n" +
" public static native <T> T applyToSet(java.util.Set<String> s);\n" +
"\n" +
" public static void applyToList(java.util.List<String> s) {\n" +
" applyToSet(new java.util.HashSet<>(s));\n" +
" }\n" +
"}\n"
});
}
// comment 12
public void testBug424637() {
Map options = getCompilerOptions();
options.put(JavaCore.COMPILER_ANNOTATION_NULL_ANALYSIS, JavaCore.ENABLED);
runConformTest(
new String[] {
"X.java",
"interface I {\n" +
" String foo(X x, String s2);\n" +
"}\n" +
"\n" +
"public class X {\n" +
" String goo(String ...ts) {\n" +
" System.out.println(ts[0]); \n" +
" return ts[0];\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" I i = X::goo;\n" +
" String s = i.foo(new X(), \"world\");\n" +
" System.out.println(s); \n" +
" }\n" +
"}\n"
},
"world\n" +
"world",
options);
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=427218, [1.8][compiler] Verify error varargs + inference
public void test427218_reduced() {
runNegativeTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String[] args) {\n" +
" match(getLast(\"a\"), null);\n" +
" }\n" +
" public static <T> T getLast(T... array) { return null; } // same with T[]\n" +
" public static void match(boolean b, Object foo) { }\n" +
"}\n",
},
"----------\n" +
"1. ERROR in X.java (at line 3)\n" +
" match(getLast(\"a\"), null);\n" +
" ^^^^^\n" +
"The method match(boolean, Object) in the type X is not applicable for the arguments (String, null)\n" +
"----------\n" +
"2. ERROR in X.java (at line 3)\n" +
" match(getLast(\"a\"), null);\n" +
" ^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from String to boolean\n" +
"----------\n" +
"3. WARNING in X.java (at line 5)\n" +
" public static <T> T getLast(T... array) { return null; } // same with T[]\n" +
" ^^^^^\n" +
"Type safety: Potential heap pollution via varargs parameter array\n" +
"----------\n");
}
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=427218, [1.8][compiler] Verify error varargs + inference
public void test427218() {
runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String[] args) {\n" +
" match(getLast(\"a\"), null);\n" +
" }\n" +
" public static <T> T getLast(T... array) { return null; } // same with T[]\n" +
" public static void match(boolean b, Object foo) { }\n" +
" public static <A> void match(Object o, A foo) { }\n" +
"}\n",
},
"");
}
public void testBug427223() {
runConformTest(
new String[] {
"Test.java",
"import java.util.*;\n" +
"public class Test {\n" +
"\n" +
" List<Object> toList(Object o) {\n" +
" if (o instanceof Optional) {\n" +
" return Arrays.asList(((Optional<?>) o).orElse(null));\n" +
" } else {\n" +
" return null;\n" +
" }\n" +
" }\n" +
"\n" +
"}\n"
});
}
public void testBug425183_comment8() {
// similar to what triggered the NPE, but it never did trigger
runConformTest(
new String[] {
"X.java",
"public class X {\n" +
" public static void main(String... args) {\n" +
" java.util.Comparator.reverseOrder().thenComparingLong(X::toLong);\n" +
" System.out.println(\"ok\");\n" +
" }\n" +
" static <T> long toLong(T in) { return 0L; }\n" +
"}\n"
},
"ok");
}
public void testBug427483() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" void test() {\n" +
" new TreeSet<>((String qn1, String qn2) -> {\n" +
" boolean b = true;\n" +
" System.out.println(b); // ok\n" +
" if(b) { }\n" +
" return qn1.compareTo(qn2);\n" +
" });\n" +
" }\n" +
"}\n"
});
}
public void testBug427504() {
runConformTest(
new String[] {
"Test.java",
"public class Test {\n" +
"\n" +
" public static <T> Tree<T> model(T o) {\n" +
" return Node(Leaf(o), Leaf(o));\n" +
" }\n" +
" \n" +
" interface Tree<T> {}\n" +
" static <T> Tree<T> Node(Tree<T>... children) { return null; }\n" +
" static <T> Tree<T> Leaf(T o) { return null; }\n" +
" \n" +
"}\n"
});
}
public void testBug427479() {
runConformTest(
new String[] {
"Bug.java",
"import java.util.*;\n" +
"import java.util.function.BinaryOperator; \n" +
"import java.util.stream.*;\n" +
"\n" +
"public class Bug {\n" +
" \n" +
" static List<String> names = Arrays.asList(\n" +
" \"ddd\",\n" +
" \"s\",\n" +
" \"sdfs\",\n" +
" \"sfdf d\"); \n" +
" \n" +
" public static void main(String[] args) {\n" +
" BinaryOperator<List<String>> merge = (List<String> first, List<String> second) -> {\n" +
" first.addAll(second);\n" +
" return first;\n" +
" };\n" +
" \n" +
" Collector<String,?,Map<Integer,List<String>>> collector= Collectors.toMap(\n" +
" s -> s.length(), \n" +
" Arrays::asList,\n" +
" merge); \n" +
" Map<Integer, List<String>> lengthToStrings = names.stream().collect(collector);\n" +
" \n" +
" lengthToStrings.forEach((Integer i, List<String> l)-> {\n" +
" System.out.println(i + \" : \" + Arrays.deepToString(l.toArray()));\n" +
" });\n" +
"\n" +
" }\n" +
"\n" +
"}\n"
});
}
public void testBug427479b() {
runNegativeTest(
new String[] {
"Bug419048.java",
"import java.util.List;\n" +
"import java.util.Map;\n" +
"import java.util.stream.Collectors;\n" +
"\n" +
"\n" +
"public class Bug419048 {\n" +
" void test1(List<Object> roster) {\n" +
" Map<String, Object> map = \n" +
" roster\n" +
" .stream()\n" +
" .collect(\n" +
" Collectors.toMap(\n" +
" p -> p.getLast(),\n" +
" p -> p.getLast()\n" +
" ));\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Bug419048.java (at line 9)\n" +
" roster\n" +
" .stream()\n" +
" .collect(\n" +
" Collectors.toMap(\n" +
" p -> p.getLast(),\n" +
" p -> p.getLast()\n" +
" ));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from Map<Object,Object> to Map<String,Object>\n" +
"----------\n" +
"2. ERROR in Bug419048.java (at line 13)\n" +
" p -> p.getLast(),\n" +
" ^^^^^^^\n" +
"The method getLast() is undefined for the type Object\n" +
"----------\n" +
"3. ERROR in Bug419048.java (at line 14)\n" +
" p -> p.getLast()\n" +
" ^^^^^^^\n" +
"The method getLast() is undefined for the type Object\n" +
"----------\n");
}
public void testBug427626() {
runNegativeTest(
new String[] {
"X.java",
"import java.util.Arrays;\n" +
"import java.util.List;\n" +
"\n" +
"public class X {\n" +
" void m() {\n" +
" List<String> ss = Arrays.asList(\"1\", \"2\", \"3\");\n" +
" \n" +
" ss.stream().map(s -> {\n" +
" class L1 {};\n" +
" class L2 {\n" +
" void mm(L1 l) {}\n" +
" }\n" +
" return new L2().mm(new L1());\n" +
" }).forEach(e -> System.out.println(e));\n" +
" }\n" +
"}"
},
"----------\n" +
"1. ERROR in X.java (at line 13)\n" +
" return new L2().mm(new L1());\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Cannot return a void result\n" +
"----------\n");
}
public void testBug426542() {
runConformTest(
new String[] {
"X.java",
"import java.io.Serializable;\n" +
"public class X {\n" +
" \n" +
" <T extends Comparable & Serializable> void foo(T o1) {\n" +
" }\n" +
"\n" +
" <T extends Serializable> void foo(T o1) {\n" +
" }\n" +
"\n" +
" void bar() {\n" +
" foo((Comparable & Serializable)0);\n" +
" foo(0);\n" +
" }\n" +
"}\n"
});
}
public void testBug426836() {
runConformTest(
new String[] {
"ReferenceToGetClass.java",
"import java.util.function.Supplier;\n" +
"\n" +
"\n" +
"public class ReferenceToGetClass {\n" +
" <T> T extract(Supplier<T> s) {\n" +
" return s.get();\n" +
" }\n" +
" Class<?> test() {\n" +
" Class<? extends ReferenceToGetClass> c = extract(this::getClass);\n" +
" return c;\n" +
" }\n" +
"}\n"
} );
}
public void testBug428019() {
runConformTest(
new String[] {
"X.java",
"final public class X {\n" +
" static class Obj {}\n" +
" static class Dial<T> {}\n" +
"\n" +
" <T> void put(Class<T> clazz, T data) {\n" +
" }\n" +
"\n" +
" static <T> Dial<T> wrap(Dial<T> dl) {\n" +
" return null;\n" +
" }\n" +
"\n" +
" static void foo(Dial<? super Obj> dial, X context) {\n" +
" context.put(Dial.class, wrap(dial));\n" +
" }\n" +
" \n" +
" public static void main(String[] args) {\n" +
" X.foo(new Dial<Obj>(), new X());\n" +
" }\n" +
"}\n"
});
}
public void testBug428198() {
runConformTest(
new String[] {
"Snippet.java",
"import java.util.*;\n" +
"interface BundleRevision {}\n" +
"interface BundleDescription extends BundleRevision {}\n" +
"public class Snippet {\n" +
" static Collection<BundleRevision> test(BundleDescription[] triggers) {\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" Collection<BundleRevision> triggerRevisions =\n" +
" //Type mismatch: cannot convert from Collection<Object> to Collection<BundleRevision>\n" +
" Collections\n" +
" .unmodifiableCollection(triggers == null ? Collections.EMPTY_LIST\n" +
" : Arrays.asList((BundleRevision[]) triggers));\n" +
" return triggerRevisions;\n" +
" }\n" +
"}\n"
});
}
public void testBug428198b() {
runConformTest(
new String[] {
"Snippet.java",
"import java.util.*;\n" +
"interface BundleRevision {}\n" +
"interface BundleDescription extends BundleRevision {}\n" +
"public class Snippet {\n" +
" static Collection<BundleRevision> test(BundleDescription[] triggers) {\n" +
" @SuppressWarnings(\"unchecked\")\n" +
" Collection<BundleRevision> triggerRevisions =\n" +
" Collections\n" +
" .unmodifiableCollection(triggers == null ? Collections.emptyList()\n" +
" : Arrays.asList((BundleRevision[]) triggers));\n" +
" return triggerRevisions;\n" +
" }\n" +
"}\n"
});
}
public void testBug428264() {
runConformTest(
new String[] {
"Y.java",
"import java.util.function.*;\n" +
"import java.util.Optional;\n" +
"\n" +
"interface I<E,F> {}\n" +
"class A<G> implements I<G, Optional<G>> {}\n" +
"\n" +
"public class Y<S,T> {\n" +
" Y(T o, Predicate<T> p, Supplier<I<S,T>> s) {}\n" +
"\n" +
" static <Z> Y<Z, Optional<Z>> m() {\n" +
" return new Y<>(Optional.empty(), Optional::isPresent, A::new);\n" +
" }\n" +
"}\n"
});
}
public void testBug428294() {
runConformTest(
new String[] {
"Junk5.java",
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.stream.Collectors;\n" +
"\n" +
"\n" +
"public class Junk5 {\n" +
"\n" +
" class TestTouchDevice {\n" +
" public Object [] points;\n" +
" }\n" +
" \n" +
" public static List<TestTouchDevice> getTouchDevices() {\n" +
" return null;\n" +
" }\n" +
"\n" +
" public static Collection<Object[]> getTouchDeviceParameters2(int minPoints) {\n" +
" Collection c = getTouchDevices().stream()\n" +
" .filter(d -> d.points.length >= minPoints)\n" +
" .map(d -> new Object[] { d })\n" +
" .collect(Collectors.toList());\n" +
" return c;\n" +
" }\n" +
" \n" +
" public static Collection<Object[]> getTouchDeviceParameters3(int minPoints) {\n" +
" return getTouchDevices().stream()\n" +
" .filter(d -> d.points.length >= minPoints)\n" +
" .map(d -> new Object[] { d })\n" +
" .collect(Collectors.toList());\n" +
" }\n" +
"}\n"
});
}
public void testBug428291() {
runConformTest(
new String[] {
"AC3.java",
"import java.util.List;\n" +
"\n" +
"interface I0<T> { }\n" +
"\n" +
"interface I1 { }\n" +
"interface I1List<E> extends List<E>, I1 {}\n" +
"interface I2<T> extends I1 {\n" +
" void foo(I0<? super T> arg1);\n" +
" void bar(I0<? super T> arg2);\n" +
"}\n" +
"interface I3<T> extends I2<T> {}\n" +
"interface I4<T> extends I2<T> { }\n" +
"interface I3List<E> extends I3<I1List<E>>, I1List<E> {}\n" +
"abstract class AC1<E> implements I3List<E> { }\n" +
"\n" +
"abstract class AC2<E> {\n" +
" public static <E> AC2<E> bork(AC2<E> f1, I3List<E> i3l, I0<? super I1List<E>> i1l) {\n" +
" return null;\n" +
" }\n" +
" public static <E> AC2<E> garp(AC2<E> f2, I0<? super I1List<E>> i1l) {\n" +
" return null;\n" +
" }\n" +
"}\n" +
"\n" +
"public abstract class AC3<E> extends AC1<E> implements I4<I1List<E>> {\n" +
"\n" +
" AC2<E> f = null;\n" +
"\n" +
" @Override\n" +
" public void foo(I0<? super I1List<E>> arg1) {\n" +
" f = AC2.bork(f, this, arg1);\n" +
" }\n" +
"\n" +
" @Override\n" +
" public void bar(I0<? super I1List<E>> arg2) {\n" +
" f = AC2.garp(f, arg2);\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428275, [1.8][compiler] CCE in InferenceContext18.varArgTypes
public void testBug428275() {
runConformTest(
new String[] {
"p1/C1.java",
"package p1;\n" +
"\n" +
"import java.util.List;\n" +
"\n" +
"public class C1<T1> {\n" +
"\n" +
" public static class CInner<T2A,T2B> {\n" +
" public CInner(T2A a, T2B b) {}\n" +
" }\n" +
" \n" +
" public static class CInner2<T3A,T3B> {\n" +
" public CInner2(String n, List<CInner<T3A,T3B>> arg) {}\n" +
" }\n" +
" \n" +
" public static <E> List<E> getList1(E... items) {\n" +
" return null;\n" +
" }\n" +
"}\n",
"Test.java",
"import java.util.List;\n" +
"\n" +
"import p1.C1;\n" +
"\n" +
"public class Test {\n" +
" void test2(List<C1.CInner2> l) {\n" +
" l.add(\n" +
" new C1.CInner2<>(\"a\",\n" +
" C1.getList1(new C1.CInner<>(\"b\", 13))\n" +
" )\n" +
" );\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428352, [1.8][compiler] NPE in AllocationExpression.analyseCode when trying to pass Consumer as Function
public void test428352() {
runNegativeTest(
new String[] {
"OperationsPile.java",
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.function.Consumer;\n" +
"import java.util.function.Function;\n" +
"\n" +
"class OperationsPile<B> {\n" +
" OperationsPile(Function<B, ?> handler) {}\n" +
"\n" +
" private static <T> void addAll3(Collection<T> c, T t) {}\n" +
"\n" +
" static <S> void adaad3(List<OperationsPile<?>> combined, Consumer<S> handler) {\n" +
" addAll3(combined, new OperationsPile<>(null));\n" +
" addAll3(combined, new OperationsPile<>(handler));\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in OperationsPile.java (at line 13)\n" +
" addAll3(combined, new OperationsPile<>(handler));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Cannot infer type arguments for OperationsPile<>\n" +
"----------\n");
}
public void test428352b() {
runConformTest(
new String[] {
"OperationsPile.java",
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.function.Consumer;\n" +
"import java.util.function.Function;\n" +
"\n" +
"public class OperationsPile<B> {\n" +
" OperationsPile(Function<B, ?> handler) {}\n" +
"\n" +
" private static <T> void addAll3(Collection<T> c, T t) {}\n" +
"\n" +
" static <S> void adaad3(List<OperationsPile<?>> combined, Consumer<S> handler) {\n" +
" addAll3(combined, new OperationsPile<>(null));\n" +
" }\n" +
" public static void main(String[] args) {\n" +
" adaad3(null, null);\n" +
" System.out.println(13);\n" +
" }\n" +
"}\n"
},
"13");
}
public void testBug428307() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"import java.util.function.Function;\n" +
"import java.util.stream.*;\n" +
"\n" +
"interface Bar {\n" +
" Class<? extends Bar> type();\n" +
"}\n" +
"public class X {\n" +
" \n" +
" <T extends Bar> T[] test(Class<T> barClass, Stream<Bar> bars) {\n" +
" return get(bars.\n" +
" collect(Collectors.toMap(Bar::type,\n" +
" Function.identity(),\n" +
" ((first,second) -> first),\n" +
" HashMap::new)),\n" +
" barClass);\n" +
" }\n" +
" \n" +
" <A extends Bar> A[] get(Map<Class<? extends Bar>,Bar> m, Class<A> c) {\n" +
" return null;\n" +
" }\n" +
"}\n"
});
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=428524, [1.8][compiler] NPE when using JSE8 Class Constructor ref "TheClass::new" and "TheClass" is using default no-arg constructor
public void test428524() {
runConformTest(
new String[] {
"X.java",
"import java.util.function.Supplier;\n" +
"public class X {\n" +
" public static void main(String[] args) {\n" +
" Supplier<WithNoArgConstructor> works = WithNoArgConstructor::new;\n" +
" System.out.println(works.get());\n" +
" Supplier<WithoutNoArgConstructor> error = WithoutNoArgConstructor::new;\n" +
" System.out.println(error.get());\n" +
" \n" +
" }\n" +
" private static class WithNoArgConstructor {\n" +
" public WithNoArgConstructor() {\n" +
" }\n" +
" public String toString() {\n" +
" return(\"WithNoArgConstructor\");\n" +
" }\n" +
" }\n" +
" private static class WithoutNoArgConstructor {\n" +
" public String toString() {\n" +
" return(\"WithOutNoArgConstructor\");\n" +
" }\n" +
" }\n" +
"}\n"
},
"WithNoArgConstructor\n" +
"WithOutNoArgConstructor");
}
public void testBug428786() {
runConformTest(
new String[] {
"Junk9.java",
"import java.util.*;\n" +
"public class Junk9 {\n" +
" class Node {\n" +
" public double getLayoutY() {return 12;}\n" +
" }\n" +
" class Node2 extends Node {\n" +
" }\n" +
" void junk() {\n" +
" List<Node2> visibleCells = new ArrayList<>(20);\n" +
" Collections.sort(visibleCells, (Node o1, Node o2) -> Double.compare(o1.getLayoutY(), o2.getLayoutY()));\n" +
" }\n" +
"}\n"
});
}
public void testBug429090_comment1() {
runNegativeTest(
new String[] {
"Junk10.java",
"\n" +
"public class Junk10 {\n" +
" class Observable<T> {}\n" +
" interface InvalidationListener {\n" +
" public void invalidated(Observable<?> observable);\n" +
" }\n" +
" public static abstract class Change<E2> {}\n" +
" interface SetChangeListener<E1> {\n" +
" void onChanged(Change<? extends E1> change);\n" +
" }\n" +
" class SetListenerHelper<T> {}\n" +
" public static <E> SetListenerHelper<E> addListener(\n" +
" SetListenerHelper<E> helper, SetChangeListener<? super E> listener) {\n" +
" return helper;\n" +
" }\n" +
" void junk() {\n" +
" addListener(null, (SetChangeListener.Change<?> c) -> {});\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Junk10.java (at line 17)\n" +
" addListener(null, (SetChangeListener.Change<?> c) -> {});\n" +
" ^^^^^^^^^^^\n" +
"The method addListener(Junk10.SetListenerHelper<E>, Junk10.SetChangeListener<? super E>) in the type Junk10 is not applicable for the arguments (null, (SetChangeListener.Change<?> c) -> {\n" +
"})\n" +
"----------\n" +
"2. ERROR in Junk10.java (at line 17)\n" +
" addListener(null, (SetChangeListener.Change<?> c) -> {});\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"SetChangeListener.Change cannot be resolved to a type\n" +
"----------\n");
}
public void testBug429090() {
runConformTest(
new String[] {
"Junk10.java",
"public class Junk10 {\n" +
" class Observable<T> {}\n" +
" interface InvalidationListener {\n" +
" public void invalidated(Observable observable);\n" +
" }\n" +
" interface SetChangeListener<E> {\n" +
" public static abstract class Change<E> {}\n" +
" void onChanged(Change<? extends E> change);\n" +
" }\n" +
" class SetListenerHelper<T> {}\n" +
" public static <E> SetListenerHelper<E> addListener(SetListenerHelper<E> helper, InvalidationListener listener) {\n" +
" return helper;\n" +
" }\n" +
" public static <E> SetListenerHelper<E> addListener(SetListenerHelper<E> helper, SetChangeListener<? super E> listener) {\n" +
" return helper;\n" +
" }\n" +
" void junk() {\n" +
" addListener(null, new SetChangeListener () {\n" +
" public void onChanged(SetChangeListener.Change change) {}\n" +
" });\n" +
" addListener(null, (SetChangeListener.Change<? extends Object> c) -> {});\n" + // original was without "extends Object"
" }\n" +
"}\n"
});
}
public void testBug429490_comment33() {
runConformTest(
new String[] {
"Junk12.java",
"public class Junk12 {\n" +
" class Observable<T> {}\n" +
" class ObservableValue<T> {}\n" +
" interface InvalidationListener {\n" +
" public void invalidated(Observable observable);\n" +
" }\n" +
" public interface ChangeListener<T> {\n" +
" void changed(ObservableValue<? extends T> observable, T oldValue, T newValue);\n" +
" }\n" +
" class ExpressionHelper<T> {}\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, InvalidationListener listener) {\n" +
" return helper;\n" +
" }\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, ChangeListener<? super T> listener) {\n" +
" return helper;\n" +
" }\n" +
" void junk() {\n" +
" addListener(null, null, new ChangeListener () {\n" +
" public void changed(ObservableValue observable, Object oldValue, Object newValue) {\n" +
" throw new RuntimeException();\n" +
" }\n" +
" });\n" +
" addListener(null, null, (value, o1, o2) -> {throw new RuntimeException();});\n" +
" }\n" +
"}\n"
});
}
public void testBug428811() {
// perhaps fail is the correct answer? FIXME: validate!
runNegativeTest(
new String[] {
"MoreCollectors.java",
"import java.util.AbstractList;\n" +
"import java.util.ArrayList;\n" +
"import java.util.Arrays;\n" +
"import java.util.Collection;\n" +
"import java.util.List;\n" +
"import java.util.stream.Collector;\n" +
"\n" +
"public class MoreCollectors {\n" +
" public static void main (String[] args) {\n" +
" ImmutableList<String> list = Arrays.asList(\"a\", \"b\", \"c\").stream().collect(toImmutableList());\n" +
" \n" +
" System.out.println(list);\n" +
" }\n" +
" \n" +
" public static <T> Collector<T, ?, ImmutableList<T>> toImmutableList () {\n" +
" return Collector.of(ArrayList<T>::new,\n" +
" List<T>::add,\n" +
" (left, right) -> { left.addAll(right); return left; },\n" +
" ImmutableList::copyOf);\n" +
" }\n" +
" \n" +
" private static class ImmutableList<T> extends AbstractList<T> {\n" +
" public static <T> ImmutableList<T> copyOf (Collection<T> c) {\n" +
" return new ImmutableList<>(c.toArray());\n" +
" }\n" +
"\n" +
" private Object[] array;\n" +
" \n" +
" private ImmutableList (Object[] array) {\n" +
" this.array = array;\n" +
" }\n" +
"\n" +
" @Override @SuppressWarnings(\"unchecked\")\n" +
" public T get(int index) {\n" +
" return (T)array[index];\n" +
" }\n" +
"\n" +
" @Override\n" +
" public int size() {\n" +
" return array.length;\n" +
" }\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in MoreCollectors.java (at line 16)\n" +
" return Collector.of(ArrayList<T>::new,\n" +
" ^^\n" +
"The method of(ArrayList<T>::new, List<T>::add, (<no type> left, <no type> right) -> {\n" +
" left.addAll(right);\n" +
" return left;\n" +
"}, ImmutableList::copyOf) is undefined for the type Collector\n" +
"----------\n" +
"2. WARNING in MoreCollectors.java (at line 23)\n" +
" public static <T> ImmutableList<T> copyOf (Collection<T> c) {\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"The method copyOf(Collection<T>) from the type MoreCollectors.ImmutableList<T> is never used locally\n" +
"----------\n");
}
// all exceptions can be inferred to match
public void testBug429430() {
runConformTest(
new String[] {
"Main.java",
"import java.io.*;\n" +
"public class Main {\n" +
" public static interface Closer<T, X extends Exception> {\n" +
" void closeIt(T it) throws X;\n" +
" }\n" +
"\n" +
" public static <T, X extends Exception> void close( Closer<T, X> closer, T it ) throws X {\n" +
" closer.closeIt(it);\n" +
" }\n" +
"\n" +
" public static void main(String[] args) throws IOException {\n" +
" InputStream in = new ByteArrayInputStream(\"hello\".getBytes());\n" +
" close( x -> x.close(), in );\n" +
" close( InputStream::close, in );\n" +
" close( (Closer<InputStream, IOException>)InputStream::close, in );\n" +
" }\n" +
"}\n"
});
}
// incompatible exceptions prevent suitable inference of exception type
public void testBug429430a() {
runNegativeTest(
new String[] {
"Main.java",
"import java.io.*;\n" +
"@SuppressWarnings(\"serial\") class EmptyStream extends Exception {}\n" +
"public class Main {\n" +
" public static interface Closer<T, X extends Exception> {\n" +
" void closeIt(T it) throws X;\n" +
" }\n" +
"\n" +
" public static <T, X extends Exception> void close( Closer<T, X> closer, T it ) throws X {\n" +
" closer.closeIt(it);\n" +
" }\n" +
"\n" +
" public static void main(String[] args) throws IOException, EmptyStream {\n" +
" InputStream in = new ByteArrayInputStream(\"hello\".getBytes());\n" +
" close( x -> { if (in.available() == 0) throw new EmptyStream(); x.close(); }, in );\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in Main.java (at line 14)\n" +
" close( x -> { if (in.available() == 0) throw new EmptyStream(); x.close(); }, in );\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Unhandled exception type Exception\n" +
"----------\n");
}
// one of two incompatible exceptions is caught
// FIXME: should be possible to infer X to EmptyStream
public void _testBug429430b() {
runConformTest(
new String[] {
"Main.java",
"import java.io.*;\n" +
"@SuppressWarnings(\"serial\") class EmptyStream extends Exception {}\n" +
"public class Main {\n" +
" public static interface Closer<T, X extends Exception> {\n" +
" void closeIt(T it) throws X;\n" +
" }\n" +
"\n" +
" public static <T, X extends Exception> void close( Closer<T, X> closer, T it ) throws X {\n" +
" closer.closeIt(it);\n" +
" }\n" +
"\n" +
" public static void main(String[] args) throws EmptyStream {\n" +
" InputStream in = new ByteArrayInputStream(\"hello\".getBytes());\n" +
" close( x -> {\n" +
" try {\n" +
" x.close();\n" +
" } catch (IOException ioex) { throw new EmptyStream(); } \n" +
" }," +
" in);\n" +
" }\n" +
"}\n"
});
}
// ensure type annotation on exception doesn't confuse the inference
public void testBug429430c() {
Map options = getCompilerOptions();
options.put(CompilerOptions.OPTION_Store_Annotations, CompilerOptions.ENABLED);
runConformTest(
new String[] {
"Main.java",
"import java.io.*;\n" +
"import java.lang.annotation.*;\n" +
"@Target(ElementType.TYPE_USE) @interface Severe {}\n" +
"public class Main {\n" +
" public static interface Closer<T, X extends Exception> {\n" +
" void closeIt(T it) throws X;\n" +
" }\n" +
"\n" +
" public static <T, X extends Exception> void close( Closer<T, X> closer, T it ) throws X {\n" +
" closer.closeIt(it);\n" +
" }\n" +
"\n" +
" static @Severe IOException getException() { return new IOException(\"severe\"); }\n" +
" public static void main(String[] args) throws IOException {\n" +
" InputStream in = new ByteArrayInputStream(\"hello\".getBytes());\n" +
" close( x -> {\n" +
" if (in.available() > 0)\n" +
" x.close();\n" +
" else\n" +
" throw getException();\n" +
" },\n" +
" in);\n" +
" }\n" +
"}\n"
},
options);
}
public void testBug429490() {
runConformTest(
new String[] {
"Junk11.java",
"public class Junk11 {\n" +
" class Observable<T> {}\n" +
" class ObservableValue<T> {}\n" +
" interface InvalidationListener {\n" +
" public void invalidated(Observable observable);\n" +
" }\n" +
" public interface ChangeListener<T> {\n" +
" void changed(ObservableValue<? extends T> observable, T oldValue, T newValue);\n" +
" }\n" +
" class ExpressionHelper<T> {}\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, InvalidationListener listener) {\n" +
" return helper;\n" +
" }\n" +
" public static <T> ExpressionHelper<T> addListener(ExpressionHelper<T> helper, ObservableValue<T> observable, ChangeListener<? super T> listener) {\n" +
" return helper;\n" +
" }\n" +
" void junk() {\n" +
" addListener(null, null, new InvalidationListener () {\n" +
" public void invalidated(Observable o) {throw new RuntimeException();}\n" +
" });\n" +
" addListener(null, null, (o) -> {throw new RuntimeException();});\n" +
" }\n" +
"}\n"
});
}
public void testBug429424() {
runConformTest(
new String[] {
"X.java",
"import java.util.*;\n" +
"public class X {\n" +
" public static void main (String[] args) {\n" +
" List<String> list = new ArrayList<>();\n" +
" list.addAll(X.newArrayList());\n" +
" System.out.println(list);\n" +
" }\n" +
" \n" +
" public static <T> List<T> newArrayList () {\n" +
" return new ArrayList<T>();\n" +
" }\n" +
"}\n" +
"\n"
});
}
public void _testBug426537() {
runNegativeTest(
new String[] {
"X.java",
"public class X {\n" +
" void foo(J[] list, I<J<?>> i) {\n" +
" sort(list, i);\n" +
" }\n" +
" \n" +
" <T> T[] sort(T[] list, I<? super T> i) {\n" +
" return list;\n" +
" }\n" +
"}\n" +
"interface I<T> {}\n" +
"interface J<T> {}\n"
},
"----------\n" +
"1. WARNING in X.java (at line 2)\n" +
" void foo(J[] list, I<J<?>> i) {\n" +
" ^\n" +
"J is a raw type. References to generic type J<T> should be parameterized\n" +
"----------\n" +
"2. ERROR in X.java (at line 3)\n" +
" sort(list, i);\n" +
" ^^^^\n" +
"The method sort(T[], I<? super T>) in the type X is not applicable for the arguments (J[], I<J<?>>)\n" +
"----------\n");
}
public void testBug426537b() {
runConformTest(
new String[] {
"Test.java",
"interface C<T, A, R> {}\n" +
"\n" +
"class MImpl<K, V> {}\n" +
"\n" +
"interface S<T> { T get(); }\n" +
"\n" +
"public class Test {\n" +
" static <T, K, D> C<T, ?, MImpl<K, D>> m1() {\n" +
" return m2(MImpl::new);\n" +
" }\n" +
" \n" +
" static <T, K, D, M extends MImpl<K, D>> C<T, ?, M> m2(S<M> s) {\n" +
" return null;\n" +
" }\n" +
"}\n" +
"\n"
});
}
public void testBug426537c() {
// touching MImpl#RAW before type inference we got undesired results from #typeArguments()
runConformTest(
new String[] {
"Ups.java",
"public class Ups {\n" +
" static Object innocent(MImpl o) {\n" +
" return o.remove(\"nice\");\n" + // method lookup triggers initialization of the RawTypeBinding.
" }\n" +
"}\n",
"Test.java",
"interface S<T> { T get(); }\n" +
"interface F<T, R> { R apply(T t); }\n" +
"interface C<T, A, R> { }\n" +
"interface IM<K,V> {}\n" +
"class MImpl<K,V> implements IM<K,V> { \n" +
" public V remove(Object key) { return null; } \n" +
"}\n" +
"public final class Test {\n" +
"\n" +
" static <T, K, A, D>\n" +
" C<T, ?, IM<K, D>> m1(F<? super T, ? extends K> f, C<? super T, A, D> c) {\n" +
" return m2(f, MImpl::new, c);\n" +
" }\n" +
"\n" +
" static <T, K, D, A, M extends IM<K, D>>\n" +
" C<T, ?, M> m2(F<? super T, ? extends K> classifier,\n" +
" S<M> mapFactory,\n" +
" C<? super T, A, D> downstream) {\n" +
" return null;\n" +
" }\n" +
"}\n"
});
}
public void testBug429203() {
Map customOptions = getCompilerOptions();
customOptions.put(CompilerOptions.OPTION_ReportRedundantSpecificationOfTypeArguments, CompilerOptions.ERROR);
runNegativeTest(
new String[] {
"DTest.java",
"import java.util.function.Function;\n" +
"\n" +
"\n" +
"public class DTest<T> {\n" +
" public DTest(Function<T, T> func) { }\n" +
" \n" +
" public DTest(DTest<Integer> dti) {}\n" +
" \n" +
" public static void main(String[] args) {\n" +
" DTest<String> t1 = new DTest<String>(new DTest<Integer>());\n" +
" }\n" +
"}\n"
},
"----------\n" +
"1. ERROR in DTest.java (at line 10)\n" +
" DTest<String> t1 = new DTest<String>(new DTest<Integer>());\n" +
" ^^^^^\n" +
"Redundant specification of type arguments <String>\n" +
"----------\n" +
"2. ERROR in DTest.java (at line 10)\n" +
" DTest<String> t1 = new DTest<String>(new DTest<Integer>());\n" +
" ^^^^^^^^^^^^^^^^^^^^\n" +
"The constructor DTest<Integer>() is undefined\n" +
"----------\n",
null, true, customOptions);
}
public void testBug430296() {
runNegativeTest(
new String[] {
"AnnotationCollector.java",
"import java.lang.annotation.*;\n" +
"import java.util.*;\n" +
"import java.util.function.*;\n" +
"import java.util.stream.*;\n" +
"\n" +
"public abstract class AnnotationCollector {\n" +
" \n" +
" Map<String, Person> test2(Stream<Person> persons) {\n" +
" return persons.collect(Collectors.toMap((Person p) -> p.getLastName(),\n" +
" Function::identity,\n" +
" (p1, p2) -> p1));\n" +
" }\n" +
"}\n" +
"\n" +
"class Person {\n" +
" String getLastName() { return \"\"; }\n" +
"}"
},
"----------\n" +
"1. ERROR in AnnotationCollector.java (at line 9)\n" +
" return persons.collect(Collectors.toMap((Person p) -> p.getLastName(),\n" +
" Function::identity,\n" +
" (p1, p2) -> p1));\n" +
" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" +
"Type mismatch: cannot convert from Map<String,Object> to Map<String,Person>\n" +
"----------\n" +
"2. ERROR in AnnotationCollector.java (at line 10)\n" +
" Function::identity,\n" +
" ^^^^^^^^^^^^^^^^^^\n" +
"The type Function does not define identity(Person) that is applicable here\n" +
"----------\n");
}
}