/* * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package test.java.math.BigDecimal; /* * @test * @bug 4904082 4917089 6337226 6378503 * @summary Tests that integral division and related methods return the proper result and scale. * @author Joseph D. Darcy */ import java.math.*; import org.testng.Assert; import org.testng.annotations.Test; // Android-changed: Replace error counting with asserts. public class IntegralDivisionTests { @Test public void dividetoIntegralValueTests() { // Exact integer quotient should have the same results from // the exact divide and dividetoIntegralValue // Rounded results BigDecimal [][] moreTestCases = { {new BigDecimal("11003"), new BigDecimal("10"), new BigDecimal("1100")}, {new BigDecimal("11003"), new BigDecimal("1e1"), new BigDecimal("1100.0")}, {new BigDecimal("1e9"), new BigDecimal("1"), new BigDecimal("1e9")}, {new BigDecimal("1e9"), new BigDecimal("1.00"), new BigDecimal("1e9")}, {new BigDecimal("1e9"), new BigDecimal("0.1"), new BigDecimal("1e10")}, {new BigDecimal("10e8"), new BigDecimal("0.1"), new BigDecimal("10e9")}, {new BigDecimal("400e1"), new BigDecimal("5"), new BigDecimal("80e1")}, {new BigDecimal("400e1"), new BigDecimal("4.999999999"), new BigDecimal("8e2")}, {new BigDecimal("40e2"), new BigDecimal("5"), new BigDecimal("8e2")}, {BigDecimal.valueOf(1, Integer.MIN_VALUE), BigDecimal.valueOf(1, -(Integer.MAX_VALUE & 0x7fffff00)), BigDecimal.valueOf(1, -256)}, }; for(BigDecimal [] testCase: moreTestCases) { BigDecimal quotient = testCase[0].divideToIntegralValue(testCase[1]); Assert.assertEquals(quotient, testCase[2], "dividend = " + testCase[0] + " scale = " + testCase[0].scale() + " divisor = " + testCase[1] + " scale = " + testCase[1].scale() + " quotient = " + quotient + " scale = " + quotient.scale() + " expected = " + testCase[2] + " scale = " + testCase[2].scale()); } } @Test public void dividetoIntegralValueRoundedTests() { BigDecimal dividend = new BigDecimal("11003"); BigDecimal divisor = new BigDecimal("10"); BigDecimal [] quotients = { // Expected results with precision = new BigDecimal("1100"), // 0 null, // 1 new BigDecimal("11e2"), // 2 new BigDecimal("110e1"), // 3 new BigDecimal("1100"), // 4 }; divideContextTestPrecs(dividend, divisor, quotients); dividend = new BigDecimal("11003"); divisor = new BigDecimal("1e1"); BigDecimal [] quotients2 = { // Expected results with precision = new BigDecimal("1100.0"), // 0 null, // 1 new BigDecimal("11e2"), // 2 new BigDecimal("110e1"), // 3 new BigDecimal("1100"), // 4 new BigDecimal("1100.0"), // 5 }; divideContextTestPrecs(dividend, divisor, quotients2); dividend = new BigDecimal("1230000"); divisor = new BigDecimal("100"); BigDecimal [] quotients3 = { // Expected results with precision = new BigDecimal("12300"), // 0 null, // 1 null, // 2 new BigDecimal("123e2"), // 3 new BigDecimal("1230e1"), // 4 new BigDecimal("12300"), // 5 }; divideContextTestPrecs(dividend, divisor, quotients3); dividend = new BigDecimal("33"); divisor = new BigDecimal("3"); BigDecimal [] quotients4 = { // Expected results with precision = new BigDecimal("11"), // 0 null, // 1 new BigDecimal("11"), // 2 new BigDecimal("11"), // 3 }; divideContextTestPrecs(dividend, divisor, quotients4); dividend = new BigDecimal("34"); divisor = new BigDecimal("3"); BigDecimal [] quotients5 = { // Expected results with precision = new BigDecimal("11"), // 0 null, // 1 new BigDecimal("11"), // 2 new BigDecimal("11"), // 3 }; divideContextTestPrecs(dividend, divisor, quotients5); } static void divideContextTestPrecs(BigDecimal dividend, BigDecimal divisor, BigDecimal[] quotients) { for(int i = 0; i < quotients.length; i++) { BigDecimal result = null; BigDecimal quotient = quotients[i]; try { result = dividend.divideToIntegralValue(divisor, new MathContext(i, RoundingMode.DOWN)); } catch (ArithmeticException e) { if (quotient != null) { Assert.fail("Unexpected exception:" + " dividend = " + dividend + " scale = " + dividend.scale() + " divisor = " + divisor + " scale = " + divisor.scale() + " expected = " + quotient + " scale = " + quotient.scale()); } } if (quotient != null) { Assert.assertEquals(quotient, result, "Unexpected result: " + " dividend = " + dividend + " scale = " + dividend.scale() + " divisor = " + divisor + " scale = " + divisor.scale() + " quotient = " + result + " scale = " + result.scale() + " expected = " + quotient + " scale = " + quotient.scale() + " precision = " + i); } else { if (result != null) { Assert.fail("Unexpected unexceptional result:" + " dividend = " + dividend + " scale = " + dividend.scale() + " divisor = " + divisor + " scale = " + divisor.scale() + " quotient = " + result + " scale = " + result.scale() + " precision = " + i); } } } } static void divideContextTests(BigDecimal dividend, BigDecimal divisor, BigDecimal expected, MathContext mc) { divideContextTest(dividend, divisor, expected, mc); divideContextTest(dividend.negate(), divisor.negate(), expected, mc); if (expected != null) { divideContextTest(dividend.negate(), divisor, expected.negate(), mc); divideContextTest(dividend, divisor.negate(), expected.negate(), mc); } } static void divideContextTest(BigDecimal dividend, BigDecimal divisor, BigDecimal expected, MathContext mc) { BigDecimal result = null; try { result = dividend.divideToIntegralValue(divisor, mc); } catch (ArithmeticException e) { if (expected != null) { Assert.fail("Unexpected exception:" + " dividend = " + dividend + " scale = " + dividend.scale() + " divisor = " + divisor + " scale = " + divisor.scale() + " expected = " + expected + " scale = " + expected.scale() + " MathContext = " + mc); } } if (expected != null) { Assert.assertEquals(result, expected, "Unexpected result:" + " dividend = " + dividend + " scale = " + dividend.scale() + " divisor = " + divisor + " scale = " + divisor.scale() + " expected = " + expected + " scale = " + expected.scale() + " result = " + result + " scale = " + result.scale() + " MathContext = " + mc); } else { if (result != null) { Assert.fail("Unexpected unexceptional result:" + "dividend = " + dividend + " scale = " + dividend.scale() + "divisor = " + divisor + " scale = " + divisor.scale() + "quotient = " + result + " scale = " + result.scale() + "MathConext = " + mc); } } } @Test public void dividetoIntegralValueScalingTests() { BigDecimal dividend = new BigDecimal("123456789000"); BigDecimal divisor = BigDecimal.ONE; BigDecimal expected = new BigDecimal("123456789e3"); MathContext mc = new MathContext(9,RoundingMode.DOWN); divideContextTests(dividend, divisor, expected, mc); // 100/3 = 33 remainder 1 int [] precisions = {0, 2, 3, 4}; dividend = new BigDecimal(100); divisor = new BigDecimal(3); expected = new BigDecimal(33); for(RoundingMode rm: RoundingMode.values()) for(int precision: precisions) { divideContextTests(dividend, divisor, expected, new MathContext(precision, rm)); } // 123000/10 = 12300 remainder 0 dividend = new BigDecimal(123000); divisor = new BigDecimal(10); int[] precisions1 = {0, 1, 2, 3, 4, 5}; BigDecimal[] expected1 = { new BigDecimal("12300"), null, null, new BigDecimal("123e2"), new BigDecimal("1230e1"), new BigDecimal("12300"), }; for(RoundingMode rm: RoundingMode.values()) for(int i = 0; i < precisions1.length; i++) { divideContextTests(dividend, divisor, expected1[i], new MathContext(precisions1[i], rm)); } // 123e3/10 = 123e2 remainder 0 dividend = new BigDecimal("123e3"); divisor = new BigDecimal(10); int[] precisions2 = {0, 1, 2, 3, 4, 5}; BigDecimal[] expected2 = { new BigDecimal("123e2"), null, null, new BigDecimal("123e2"), new BigDecimal("123e2"), new BigDecimal("123e2"), }; for(RoundingMode rm: RoundingMode.values()) for(int i = 0; i < precisions2.length; i++) { divideContextTests(dividend, divisor, expected2[i], new MathContext(precisions2[i], rm)); } // 123000/1e1 = 12300.0 remainder 0 dividend = new BigDecimal("123000"); divisor = new BigDecimal("1e1"); int[] precisions3 = {0, 1, 2, 3, 4, 5, 6}; BigDecimal[] expected3 = { new BigDecimal("12300.0"), null, null, new BigDecimal("123e2"), new BigDecimal("1230e1"), new BigDecimal("12300"), new BigDecimal("12300.0"), }; for(RoundingMode rm: RoundingMode.values()) for(int i = 0; i < precisions3.length; i++) { divideContextTests(dividend, divisor, expected3[i], new MathContext(precisions3[i], rm)); } } }