1 /* 2 * Copyright (C) 2012 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 import java.util.Random; 18 19 /** 20 * Tests long division by zero for both / and %. 21 */ 22 public class ZeroTests { longDivTest()23 public void longDivTest() throws Exception { 24 longTest("longDivTest", true); 25 } 26 longModTest()27 public void longModTest() throws Exception { 28 longTest("longModTest", false); 29 } 30 longTest(String name, boolean divide)31 private static void longTest(String name, boolean divide) throws Exception { 32 // Warm up JIT. 33 for (int i = 0; i < 10000; ++i) { 34 try { 35 // We won't JIT code that hasn't completed successfully, so rhs can't be 0 here! 36 if (divide) { 37 longDiv(1, 1); 38 } else { 39 longMod(1, 1); 40 } 41 } catch (ArithmeticException expected) { 42 throw new AssertionError(name + " threw during warmup"); 43 } 44 } 45 46 // Boom? 47 int catchCount = 0; 48 for (int i = 0; i < 10000; ++i) { 49 try { 50 if (divide) { 51 longDiv(1, 0); 52 } else { 53 longMod(1, 0); 54 } 55 throw new AssertionError(name + " failed to throw: " + i); 56 } catch (ArithmeticException expected) { 57 ++catchCount; 58 } 59 } 60 if (catchCount != 10000) throw new AssertionError(name + " failed: " + catchCount); 61 62 System.out.println(name + " passes"); 63 } 64 longDiv(long lhs, long rhs)65 private static long longDiv(long lhs, long rhs) { 66 return lhs / rhs; 67 } 68 longMod(long lhs, long rhs)69 private static long longMod(long lhs, long rhs) { 70 return lhs % rhs; 71 } 72 } 73