1 files changed, 80 insertions, 0 deletions
diff --git a/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/FilteringTransformerTests.java b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/FilteringTransformerTests.java
new file mode 100644
index 0000000000..9f5c198a46
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+++ b/common/tests/org.eclipse.jpt.common.utility.tests/src/org/eclipse/jpt/common/utility/tests/internal/transformer/FilteringTransformerTests.java
@@ -0,0 +1,80 @@
+/*******************************************************************************
+ * 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 org.eclipse.jpt.common.utility.internal.predicate.PredicateAdapter;
+import org.eclipse.jpt.common.utility.internal.predicate.PredicateTools;
+import org.eclipse.jpt.common.utility.internal.transformer.FilteringTransformer;
+import org.eclipse.jpt.common.utility.internal.transformer.TransformerTools;
+import org.eclipse.jpt.common.utility.predicate.Predicate;
+import org.eclipse.jpt.common.utility.transformer.Transformer;
+import junit.framework.TestCase;
+
+@SuppressWarnings("nls")
+public class FilteringTransformerTests
+	extends TestCase
+{
+	public FilteringTransformerTests(String name) {
+		super(name);
+	}
+
+	public void testTransform() {
+		Predicate<String> nonNullFilter = new Filter(3);
+		Predicate<String> filter = PredicateTools.nullCheck(nonNullFilter, false);
+		Transformer<String, String> transformer = TransformerTools.filteringTransformer(filter);
+
+		assertEquals("foo", transformer.transform("foo"));
+		assertEquals("bar", transformer.transform("bar"));
+		assertNull(transformer.transform("barbar"));
+		assertNull(transformer.transform("b"));
+		assertNull(transformer.transform(""));
+		assertNull(transformer.transform(null));
+	}
+
+	public void testToString() {
+		Predicate<String> nonNullFilter = new Filter(3);
+		Predicate<String> filter = PredicateTools.nullCheck(nonNullFilter, false);
+		Transformer<String, String> transformer = TransformerTools.filteringTransformer(filter);
+		assertTrue(transformer.toString().indexOf("Filtering") != -1);
+	}
+
+	public void testGetters() {
+		Predicate<String> nonNullFilter = new Filter(3);
+		Predicate<String> filter = PredicateTools.nullCheck(nonNullFilter, false);
+		FilteringTransformer<String> transformer = (FilteringTransformer<String>) TransformerTools.filteringTransformer(filter);
+		assertSame(filter, transformer.getFilter());
+		assertNull(transformer.getDefaultOutput());
+	}
+
+	public void testCtor_NPE() {
+		boolean exCaught = false;
+		try {
+			Transformer<String, String> transformer = TransformerTools.filteringTransformer(null);
+			fail("bogus: " + transformer);
+		} catch (NullPointerException ex) {
+			exCaught = true;
+		}
+		assertTrue(exCaught);
+	}
+
+	public static class Filter
+		extends PredicateAdapter<String>
+	{
+		public final int length;
+		public Filter(int length) {
+			super();
+			this.length =length;
+		}
+		@Override
+		public boolean evaluate(String variable) {
+			return variable.length() == this.length;
+		}
+	}
+}