@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]"));
}
@Test
public void usesOriginalObjectWhenClosureReturnsObjectOfUnexpectedType() {
Closure closure = HelperUtil.toClosure("{ 9 }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original"));
}
@Test
public void usesOriginalObjectWhenClosureReturnsNull() {
Closure closure = HelperUtil.toClosure("{ null }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original"));
}
@Test
public void canUseAClosureAsATransformer() {
Closure closure = HelperUtil.toClosure("{ it + ' transformed' }");
transformer.add(closure);
assertThat(transformer.transform("original"), equalTo("original transformed"));
}
@Test
public void passesObjectToEachTransformerInTurn() {
@SuppressWarnings("unchecked")
final Transformer<String> transformerA = context.mock(Transformer.class, "transformerA");
@SuppressWarnings("unchecked")
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 doesNothingWhenNoTransformersAdded() {
assertThat(transformer.transform("value"), equalTo("value"));
}