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/*******************************************************************************
* Copyright (c) 2009, 2013 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.iterable;
import java.util.ArrayList;
import java.util.Collection;
import junit.framework.TestCase;
import org.eclipse.jpt.common.utility.internal.iterable.TransformationIterable;
import org.eclipse.jpt.common.utility.internal.transformer.DisabledTransformer;
import org.eclipse.jpt.common.utility.internal.transformer.TransformerAdapter;
import org.eclipse.jpt.common.utility.transformer.Transformer;
@SuppressWarnings("nls")
public class TransformationIterableTests
extends TestCase
{
public TransformationIterableTests(String name) {
super(name);
}
public void testTransform() {
int i = 1;
for (Integer integer : this.buildIterable()) {
assertEquals(i++, integer.intValue());
}
}
private Iterable<Integer> buildIterable() {
return this.buildTransformationIterable(this.buildNestedIterable());
}
private Iterable<Integer> buildTransformationIterable(Iterable<String> nestedIterable) {
// transform each string into an integer with a value of the string's length
return new TransformationIterable<String, Integer>(nestedIterable, STRING_LENGTH_TRANSFORMER);
}
private Iterable<String> buildNestedIterable() {
Collection<String> c = new ArrayList<String>();
c.add("1");
c.add("22");
c.add("333");
c.add("4444");
c.add("55555");
c.add("666666");
c.add("7777777");
c.add("88888888");
return c;
}
public void testToString() {
assertNotNull(this.buildIterable().toString());
}
public void testMissingTransformer() {
Iterable<Integer> iterable = new TransformationIterable<String, Integer>(this.buildNestedIterable(), DisabledTransformer.<String, Integer>instance());
boolean exCaught = false;
try {
int i = 1;
for (Integer integer : iterable) {
assertEquals(i++, integer.intValue());
}
} catch (RuntimeException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
static final Transformer<String, Integer> STRING_LENGTH_TRANSFORMER = new StringLengthTransformer();
/**
* transform each string into an integer with a value of the string's length
*/
static class StringLengthTransformer
extends TransformerAdapter<String, Integer>
{
@Override
public Integer transform(String s) {
return new Integer(s.length());
}
}
}
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