1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8024500 27 * @run testng BiFunctionTest 28 */ 29 30 package test.java.util.function.BiFunction; 31 32 import java.util.function.BiFunction; 33 import java.util.function.Function; 34 import org.testng.annotations.Test; 35 36 import static org.testng.Assert.assertEquals; 37 import static org.testng.Assert.fail; 38 39 @Test(groups = "unit") 40 public class BiFunctionTest { 41 static class Quote { 42 double unit_price; 43 Quote(double price)44 Quote(double price) { 45 unit_price = price; 46 } 47 }; 48 49 static class Order { 50 int quantity; 51 Order(int quantity)52 Order(int quantity) { 53 this.quantity = quantity; 54 } 55 }; 56 57 BiFunction<Quote, Order, Double> estimate = (quote, order) -> { 58 if (quote.unit_price < 0) { 59 throw new IllegalArgumentException("quote"); 60 } 61 62 if (order.quantity < 0) { 63 throw new IllegalArgumentException("order"); 64 } 65 66 return quote.unit_price * order.quantity; 67 }; 68 69 Function<Double, Long> creditcheck = total -> { 70 if (total > 100.00) { 71 throw new RuntimeException("overlimit"); 72 } 73 return total.longValue(); 74 }; 75 testAndThen()76 public void testAndThen() { 77 try { 78 BiFunction<Quote, Order, Long> checkout = estimate.andThen(null); 79 fail("Null argument should throw NPE"); 80 } catch (NullPointerException npe) { 81 // ignore 82 } 83 84 BiFunction<Quote, Order, Long> checkout = estimate.andThen(creditcheck); 85 try { 86 checkout.apply(new Quote(20.0), new Order(-1)); 87 fail("First function delivers exception"); 88 } catch (IllegalArgumentException e) { 89 assertEquals(e.getMessage(), "order"); 90 } 91 92 try { 93 checkout.apply(new Quote(20.0), new Order(10)); 94 fail("Second function delivers exception"); 95 } catch (RuntimeException e) { 96 assertEquals(e.getMessage(), "overlimit"); 97 } 98 99 assertEquals(49, checkout.apply(new Quote(24.99), new Order(2)).longValue()); 100 assertEquals(50, checkout.apply(new Quote(25), new Order(2)).longValue()); 101 } 102 } 103