/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 libcore.java.util.function;
import junit.framework.TestCase;
import java.util.function.IntUnaryOperator;
public class IntUnaryOperatorTest extends TestCase {
public void testIdentity() throws Exception {
assertEquals(1, IntUnaryOperator.identity().applyAsInt(1));
assertEquals(Integer.MAX_VALUE, IntUnaryOperator.identity().applyAsInt(Integer.MAX_VALUE));
}
public void testCompose() throws Exception {
IntUnaryOperator plusOne = x -> x + 1;
IntUnaryOperator twice = x -> 2 *x;
assertEquals(11, plusOne.compose(twice).applyAsInt(5));
}
public void testCompose_null() throws Exception {
IntUnaryOperator plusOne = x -> x + 1;
try {
plusOne.compose(null);
fail();
} catch (NullPointerException expected) {}
}
public void testAndThen() throws Exception {
IntUnaryOperator plusOne = x -> x + 1;
IntUnaryOperator twice = x -> 2 *x;
assertEquals(12, plusOne.andThen(twice).applyAsInt(5));
}
public void testAndThen_null() throws Exception {
IntUnaryOperator plusOne = x -> x + 1;
try {
plusOne.andThen(null);
fail();
} catch (NullPointerException expected) {}
}
}