add CollectionFirstElementTransformer and

CollectionSingleElementTransformer

3 files changed, 103 insertions, 1 deletions

diff --git a/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionFirstElementTransformerTests.java b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionFirstElementTransformerTests.java
new file mode 100644
index 0000000000..298dd4b2ca
--- /dev/null
+++ b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionFirstElementTransformerTests.java
@@ -0,0 +1,50 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Oracle. 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:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.utility.tests.internal.transformer;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import org.eclipse.jpt.common.utility.internal.transformer.TransformerTools;
+import org.eclipse.jpt.common.utility.tests.internal.TestTools;
+import org.eclipse.jpt.common.utility.transformer.Transformer;
+import junit.framework.TestCase;
+
+@SuppressWarnings("nls")
+public class CollectionFirstElementTransformerTests
+	extends TestCase
+{
+	public CollectionFirstElementTransformerTests(String name) {
+		super(name);
+	}
+
+	public void testEvaluate() {
+		Collection<String> list = new ArrayList<>();
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionFirstElementTransformer();
+		assertNull(transformer.transform(list));
+		list.add("foo");
+		assertEquals("foo", transformer.transform(list));
+		list.add("bar");
+		assertEquals("foo", transformer.transform(list));
+		list.remove("foo");
+		assertEquals("bar", transformer.transform(list));
+		list.remove("bar");
+		assertNull(transformer.transform(list));
+	}
+
+	public void testToString() {
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionFirstElementTransformer();
+		assertEquals("CollectionFirstElementTransformer", transformer.toString());
+	}
+
+	public void testSerialization() throws Exception {
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionFirstElementTransformer();
+		assertSame(transformer, TestTools.serialize(transformer));
+	}
+}
diff --git a/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionSingleElementTransformerTests.java b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionSingleElementTransformerTests.java
new file mode 100644
index 0000000000..845cb635d3
--- /dev/null
+++ b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/CollectionSingleElementTransformerTests.java
@@ -0,0 +1,50 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Oracle. 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:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.common.utility.tests.internal.transformer;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import org.eclipse.jpt.common.utility.internal.transformer.TransformerTools;
+import org.eclipse.jpt.common.utility.tests.internal.TestTools;
+import org.eclipse.jpt.common.utility.transformer.Transformer;
+import junit.framework.TestCase;
+
+@SuppressWarnings("nls")
+public class CollectionSingleElementTransformerTests
+	extends TestCase
+{
+	public CollectionSingleElementTransformerTests(String name) {
+		super(name);
+	}
+
+	public void testEvaluate() {
+		Collection<String> list = new ArrayList<>();
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionSingleElementTransformer();
+		assertNull(transformer.transform(list));
+		list.add("foo");
+		assertEquals("foo", transformer.transform(list));
+		list.add("bar");
+		assertNull(transformer.transform(list));
+		list.remove("foo");
+		assertEquals("bar", transformer.transform(list));
+		list.remove("bar");
+		assertNull(transformer.transform(list));
+	}
+
+	public void testToString() {
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionSingleElementTransformer();
+		assertEquals("CollectionSingleElementTransformer", transformer.toString());
+	}
+
+	public void testSerialization() throws Exception {
+		Transformer<Collection<String>, String> transformer = TransformerTools.collectionSingleElementTransformer();
+		assertSame(transformer, TestTools.serialize(transformer));
+	}
+}
diff --git a/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/JptCommonUtilityTransformerTests.java b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/JptCommonUtilityTransformerTests.java
index f8a0f4ffaa..a087f1d57e 100644
--- a/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/JptCommonUtilityTransformerTests.java
+++ b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/JptCommonUtilityTransformerTests.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Oracle. All rights reserved.
+ * Copyright (c) 2012, 2016 Oracle. 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.
@@ -20,6 +20,8 @@ public class JptCommonUtilityTransformerTests {
 	public static Test suite() {
 		TestSuite suite = new TestSuite(JptCommonUtilityTransformerTests.class.getPackage().getName());
 
+		suite.addTestSuite(CollectionFirstElementTransformerTests.class);
+		suite.addTestSuite(CollectionSingleElementTransformerTests.class);
 		suite.addTestSuite(XMLStringDecoderTests.class);
 		suite.addTestSuite(XMLStringEncoderTests.class);