| /* |
| * Copyright (c) 2003, 2005, 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. |
| */ |
| /* |
| * @test |
| * @bug 4904082 4917089 6337226 |
| * @summary Tests that integral division and related methods return the proper result and scale. |
| * @author Joseph D. Darcy |
| */ |
| import java.math.*; |
| public class IntegralDivisionTests { |
| |
| static int dividetoIntegralValueTests() { |
| int failures = 0; |
| |
| // 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")}, |
| }; |
| |
| for(BigDecimal [] testCase: moreTestCases) { |
| BigDecimal quotient; |
| if (! (quotient=testCase[0].divideToIntegralValue(testCase[1])).equals(testCase[2]) ){ |
| failures++; |
| // BigDecimal exact = testCase[0].divide(testCase[1]); |
| System.err.println(); |
| System.err.println("dividend = " + testCase[0] + " scale = " + testCase[0].scale()); |
| System.err.println("divisor = " + testCase[1] + " scale = " + testCase[1].scale()); |
| System.err.println("quotient = " + quotient + " scale = " + quotient.scale()); |
| System.err.println("expected = " + testCase[2] + " scale = " + testCase[2].scale()); |
| // System.err.println("exact = " + exact + " scale = " + exact.scale()); |
| } |
| } |
| |
| return failures; |
| } |
| |
| static int dividetoIntegralValueRoundedTests() { |
| int failures = 0; |
| |
| 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 |
| }; |
| failures += 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 |
| }; |
| failures += 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 |
| }; |
| failures += 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 |
| }; |
| failures += 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 |
| }; |
| failures += divideContextTestPrecs(dividend, divisor, quotients5); |
| |
| return failures; |
| } |
| |
| static int divideContextTestPrecs(BigDecimal dividend, |
| BigDecimal divisor, |
| BigDecimal[] quotients) |
| { |
| int failures = 0; |
| 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) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected exception:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("expected = " + quotient + " scale = " + quotient.scale()); |
| } |
| } |
| |
| if (quotient != null) { |
| if (! result.equals(quotient)) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected result:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("quotient = " + result + " scale = " + result.scale()); |
| System.err.println("expected = " + quotient + " scale = " + quotient.scale()); |
| System.err.println("precision = " + i); |
| } |
| } else { |
| if (result != null) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected unexceptional result:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("quotient = " + result + " scale = " + result.scale()); |
| System.err.println("precision = " + i); |
| } |
| } |
| |
| } |
| return failures; |
| } |
| |
| |
| static int divideContextTests(BigDecimal dividend, |
| BigDecimal divisor, |
| BigDecimal expected, |
| MathContext mc) { |
| int failures = 0; |
| |
| failures += divideContextTest(dividend, divisor, expected, mc); |
| failures += divideContextTest(dividend.negate(), divisor.negate(), expected, mc); |
| |
| if (expected != null) { |
| failures += divideContextTest(dividend.negate(), divisor, expected.negate(), mc); |
| failures += divideContextTest(dividend, divisor.negate(), expected.negate(), mc); |
| } |
| |
| return failures; |
| } |
| |
| |
| static int divideContextTest(BigDecimal dividend, |
| BigDecimal divisor, |
| BigDecimal expected, |
| MathContext mc) |
| { |
| int failures = 0; |
| |
| BigDecimal result = null; |
| |
| try { |
| result = dividend.divideToIntegralValue(divisor, mc); |
| } catch (ArithmeticException e) { |
| if (expected != null) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected exception:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("expected = " + expected + " scale = " + expected.scale()); |
| System.err.println("MathContext = " + mc); |
| } |
| } |
| |
| if (expected != null) { |
| if (! result.equals(expected)) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected result:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("expected = " + expected + " scale = " + expected.scale()); |
| System.err.println("result = " + result + " scale = " + result.scale()); |
| System.err.println("MathContext = " + mc); |
| } |
| } else { |
| if (result != null) { |
| failures++; |
| System.err.println(); |
| System.err.println("Unexpected unexceptional result:"); |
| System.err.println("dividend = " + dividend + " scale = " + dividend.scale()); |
| System.err.println("divisor = " + divisor + " scale = " + divisor.scale()); |
| System.err.println("quotient = " + result + " scale = " + result.scale()); |
| System.err.println("MathConext = " + mc); |
| } |
| } |
| |
| return failures; |
| } |
| |
| static int dividetoIntegralValueScalingTests() { |
| int failures = 0; |
| |
| BigDecimal dividend = new BigDecimal("123456789000"); |
| BigDecimal divisor = BigDecimal.ONE; |
| BigDecimal expected = new BigDecimal("123456789e3"); |
| MathContext mc = new MathContext(9,RoundingMode.DOWN); |
| failures += 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) { |
| failures += 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++) { |
| failures += 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++) { |
| failures += 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++) { |
| failures += divideContextTests(dividend, divisor, |
| expected3[i], |
| new MathContext(precisions3[i], rm)); |
| } |
| |
| |
| |
| return failures; |
| } |
| |
| public static void main(String argv[]) { |
| int failures = 0; |
| |
| failures += dividetoIntegralValueTests(); |
| failures += dividetoIntegralValueRoundedTests(); |
| failures += dividetoIntegralValueScalingTests(); |
| |
| if (failures > 0) { |
| System.err.println("Encountered " + failures + |
| " failures while testing integral division."); |
| throw new RuntimeException(); |
| } |
| } |
| } |
