/*
* 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.BiFunction;
import java.util.function.Function;
public class BiFunctionTest extends TestCase {
public void testAndThen() throws Exception {
BiFunction<Integer, Integer, Integer> add = (x, y) -> x + y;
Function<Integer, String> toString = i -> Integer.toString(i);
assertEquals("4", add.andThen(toString).apply(2, 2));
}
public void testAndThen_nullFunction() throws Exception {
BiFunction<Integer, Integer, Integer> add = (x, y) -> x + y;
try {
add.andThen(null);
fail();
} catch (NullPointerException expected) {}
}
public void testAndThen_nullResult() throws Exception {
BiFunction<Integer, Integer, Integer> toNull = (x, y) -> null;
Function<Integer, String> assertNull = i -> { assertNull(i); return "ok"; };
assertEquals("ok", toNull.andThen(assertNull).apply(2, 2));
}
}