/*
* Copyright 2008 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.gradle.api.internal;
import org.jmock.integration.junit4.JUnit4Mockery;
import org.jmock.integration.junit4.JMock;
import org.jmock.Expectations;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.gradle.util.HelperUtil;
import org.gradle.api.Transformer;
import groovy.lang.Closure;
@RunWith(JMock.class)
public class ChainingTransformerTest {
private final JUnit4Mockery context = new JUnit4Mockery();
private final ChainingTransformer<String> transformer = new ChainingTransformer<String>(String.class);
@Test
public void doesNothingWhenNoTransformersAdded() {
assertThat(transformer.transform("value"), equalTo("value"));
}
@Test
public void passesObjectToEachTransformerInTurn() {
final Transformer<String> transformerA = context.mock(Transformer.class, "transformerA");
final Transformer<String> transformerB = context.mock(Transformer.class, "transformerB");
context.checking(new Expectations(){{
one(transformerA).transform("original");
will(returnValue("a"));
one(transformerB).transform("a");
will(returnValue("b"));
}});
transformer.add(transformerA);
transformer.add(transformerB);
assertThat(transformer.transform("original"), equalTo("b"));
}
@Test
public void canUseAClosureAsATransformer() {
Closure closure = HelperUtil.toClosure("{ it + ' transformed' }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original transformed"));
}
@Test
public void usesOriginalObjectWhenClosureReturnsNull() {
Closure closure = HelperUtil.toClosure("{ null }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original"));
}
@Test
public void usesOriginalObjectWhenClosureReturnsObjectOfUnexpectedType() {
Closure closure = HelperUtil.toClosure("{ 9 }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original"));
}
@Test
public void originalObjectIsSetAsDelegateForClosure() {
Closure closure = HelperUtil.toClosure("{ substring(1, 3) }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("ri"));
}
@Test
public void closureCanTransformAStringIntoAGString() {
Closure closure = HelperUtil.toClosure("{ \"[$it]\" }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("[original]"));
}
}