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95 lines (79 loc) · 2.89 KB
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/*
* Copyright 2011-2016 David Karnok
*
* 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 ix;
import java.util.Iterator;
import org.junit.*;
public class TransformTest {
@Test
public void normal() {
Ix<Integer> source = Ix.just(1).transform(new IxTransform<Integer, Integer>() {
@Override
public int moveNext(Iterator<Integer> it, IxConsumer<? super Integer> out) {
if (it.hasNext()) {
out.accept(it.next() + 10);
return IxTransform.NEXT;
}
out.accept(12);
return IxTransform.LAST;
}
});
IxTestHelper.assertValues(source, 11, 12);
IxTestHelper.assertNoRemove(source);
}
@Test
public void stop() {
Ix<Integer> source = Ix.just(1).transform(new IxTransform<Integer, Integer>() {
@Override
public int moveNext(Iterator<Integer> it, IxConsumer<? super Integer> out) {
return IxTransform.STOP;
}
});
IxTestHelper.assertValues(source);
IxTestHelper.assertNoRemove(source);
}
@Test
public void doubleNext() {
try {
Ix<Integer> source = Ix.just(1).transform(new IxTransform<Integer, Integer>() {
@Override
public int moveNext(Iterator<Integer> it, IxConsumer<? super Integer> out) {
out.accept(1);
out.accept(2);
return IxTransform.NEXT;
}
});
IxTestHelper.assertValues(source);
Assert.fail("Failed to throw IllegalStateException");
} catch (IllegalStateException ex) {
Assert.assertEquals("Value already set in this turn!", ex.getMessage());
}
}
@Test
public void returnNextWithoutValue() {
try {
Ix<Integer> source = Ix.just(1).transform(new IxTransform<Integer, Integer>() {
@Override
public int moveNext(Iterator<Integer> it, IxConsumer<? super Integer> out) {
return IxTransform.NEXT;
}
});
IxTestHelper.assertValues(source);
Assert.fail("Failed to throw IllegalStateException");
} catch (IllegalStateException ex) {
Assert.assertEquals("No value set!", ex.getMessage());
}
}
}