Bug 546706 - [test] Parameter name minings on multi-line invocations

This test reproduces and checks issue reported in the bug, about the
code mining rendering taking place at wrong locations.

Change-Id: I0aadee7ddaa20ecf01b7f636d99b4f1e7cfdd421
Signed-off-by: Mickael Istria <mistria@redhat.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/org.eclipse.jdt.text.tests/src/org/eclipse/jdt/text/tests/codemining/ParameterNamesCodeMiningTest.java b/org.eclipse.jdt.text.tests/src/org/eclipse/jdt/text/tests/codemining/ParameterNamesCodeMiningTest.java
index 7fe2b181ed..a2c65730c6 100644
--- a/org.eclipse.jdt.text.tests/src/org/eclipse/jdt/text/tests/codemining/ParameterNamesCodeMiningTest.java
+++ b/org.eclipse.jdt.text.tests/src/org/eclipse/jdt/text/tests/codemining/ParameterNamesCodeMiningTest.java
@@ -16,8 +16,11 @@ package org.eclipse.jdt.text.tests.codemining;
 import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.LongSupplier;
 
+import org.junit.After;
 import org.junit.Assert;
+import org.junit.Before;
 
 import org.eclipse.jdt.testplugin.JavaProjectHelper;
 
@@ -72,6 +75,7 @@ public class ParameterNamesCodeMiningTest extends TestCase {
 	}
 
 	@Override
+	@Before
 	protected void setUp() throws Exception {
 		super.setUp();
 		if(!welcomeClosed) {
@@ -85,6 +89,7 @@ public class ParameterNamesCodeMiningTest extends TestCase {
 	}
 
 	@Override
+	@After
 	protected void tearDown() throws Exception {
 		super.tearDown();
 		IWorkbenchPage workbenchPage= PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
@@ -115,6 +120,34 @@ public class ParameterNamesCodeMiningTest extends TestCase {
 		assertEquals(2, fParameterNameCodeMiningProvider.provideCodeMinings(viewer, new NullProgressMonitor()).get().size());
 	}
 
+	public void testMultiLines() throws Exception {
+		String contents =
+				"class Foo {\n" +
+				"	long n = Math.max(System.currentTimeMillis(\n" +
+				"					), 0);\n" +
+				"}";
+		ICompilationUnit compilationUnit= fPackage.createCompilationUnit("Foo.java", contents, true, new NullProgressMonitor());
+		JavaEditor editor= (JavaEditor) EditorUtility.openInEditor(compilationUnit);
+		fParameterNameCodeMiningProvider.setContext(editor);
+		JavaSourceViewer viewer = (JavaSourceViewer)editor.getViewer();
+		viewer.setCodeMiningProviders(new ICodeMiningProvider[] {
+				fParameterNameCodeMiningProvider
+		});
+		assertEquals(2, fParameterNameCodeMiningProvider.provideCodeMinings(viewer, new NullProgressMonitor()).get().size());
+		//
+		StyledText widget = viewer.getTextWidget();
+		int charWidth = widget.getTextBounds(0, 1).width;
+		LongSupplier drawnCodeMiningsCount = () -> Arrays.stream(widget.getStyleRanges()).filter(style ->
+			style.metrics != null && style.metrics.width > charWidth).count();
+		new DisplayHelper() {
+			@Override
+			protected boolean condition() {
+				return drawnCodeMiningsCount.getAsLong() == 2;
+			}
+		}.waitForCondition(widget.getDisplay(), 500);
+		assertEquals(2, drawnCodeMiningsCount.getAsLong());
+	}
+
 	public void testUnresolvedMethodBinding() throws Exception {
 		String contents= "public class Foo {\n" +
 		"	public void mehod() {\n" +