1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package libcore.java.util.function; 18 19 import junit.framework.TestCase; 20 21 import java.util.Comparator; 22 import java.util.function.BinaryOperator; 23 24 public class BinaryOperatorTest extends TestCase { 25 26 public void testMinBy() throws Exception { 27 Comparator<String> stringComparator = String::compareTo; 28 assertEquals("a", BinaryOperator.minBy(stringComparator).apply("a", "b")); 29 } 30 31 public void testMinBy_null() throws Exception { 32 try { 33 BinaryOperator.minBy(null); 34 fail(); 35 } catch (NullPointerException expected) {} 36 } 37 38 public void testMaxBy() throws Exception { 39 Comparator<String> stringComparator = String::compareTo; 40 assertEquals("b", BinaryOperator.maxBy(stringComparator).apply("a", "b")); 41 } 42 43 public void testMaxBy_null() throws Exception { 44 try { 45 BinaryOperator.maxBy(null); 46 fail(); 47 } catch (NullPointerException expected) {} 48 } 49 } 50
