| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| |
| package com.google.gwt.emultest.java.lang; |
| |
| import com.google.gwt.junit.client.GWTTestCase; |
| |
| /** |
| * Tests for JRE emulation of java.lang.Math. |
| * |
| * TODO: more tests |
| */ |
| public class MathTest extends GWTTestCase { |
| |
| private static native boolean isNegativeZero(double x) /*-{ |
| var v = 1 / x; |
| return v == Number.NEGATIVE_INFINITY; |
| }-*/; |
| |
| private static native double makeNegativeZero() /*-{ |
| return 1 / Number.NEGATIVE_INFINITY; |
| }-*/; |
| |
| @Override |
| public String getModuleName() { |
| return "com.google.gwt.emultest.EmulSuite"; |
| } |
| |
| public void testAbs() { |
| double v = Math.abs(-1.0); |
| double negativeZero = makeNegativeZero(); |
| assertTrue(isNegativeZero(negativeZero)); |
| assertEquals(1.0, v); |
| v = Math.abs(1.0); |
| assertEquals(1.0, v); |
| v = Math.abs(negativeZero); |
| assertEquals(0.0, v); |
| assertFalse(isNegativeZero(v)); |
| v = Math.abs(0.0); |
| assertEquals(0.0, v); |
| v = Math.abs(Double.NEGATIVE_INFINITY); |
| assertEquals(Double.POSITIVE_INFINITY, v); |
| v = Math.abs(Double.POSITIVE_INFINITY); |
| assertEquals(Double.POSITIVE_INFINITY, v); |
| v = Math.abs(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| } |
| |
| public void testCbrt() { |
| double v = Math.cbrt(1000.0); |
| assertEquals(10.0, v, 1e-7); |
| } |
| |
| public void testCos() { |
| double v = Math.cos(0.0); |
| assertEquals(1.0, v, 1e-7); |
| v = Math.cos(-0.0); |
| assertEquals(1.0, v, 1e-7); |
| v = Math.cos(Math.PI * .5); |
| assertEquals(0.0, v, 1e-7); |
| v = Math.cos(Math.PI); |
| assertEquals(-1.0, v, 1e-7); |
| v = Math.cos(Math.PI * 1.5); |
| assertEquals(0.0, v, 1e-7); |
| v = Math.cos(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.cos(Double.NEGATIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| v = Math.cos(Double.POSITIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| } |
| |
| public void testCosh() { |
| double v = Math.cosh(0.0); |
| assertEquals(1.0, v, 1e-7); |
| v = Math.cosh(1.0); |
| assertEquals(1.5430806348, v, 1e-7); |
| v = Math.cosh(-1.0); |
| assertEquals(1.5430806348, v, 1e-7); |
| v = Math.cosh(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.cosh(Double.NEGATIVE_INFINITY); |
| assertEquals(Double.POSITIVE_INFINITY, v); |
| v = Math.cosh(Double.POSITIVE_INFINITY); |
| assertEquals(Double.POSITIVE_INFINITY, v); |
| } |
| |
| public void testLog() { |
| double v = Math.log(Math.E); |
| assertEquals(1.0, v, 1e-15); |
| } |
| |
| public void testLog10() { |
| double v = Math.log10(1000.0); |
| assertEquals(3.0, v, 1e-15); |
| } |
| |
| public void testSin() { |
| double v = Math.sin(0.0); |
| assertEquals(0.0, v, 1e-7); |
| v = Math.sin(-0.0); |
| assertEquals(-0.0, v, 1e-7); |
| v = Math.sin(Math.PI * .5); |
| assertEquals(1.0, v, 1e-7); |
| v = Math.sin(Math.PI); |
| assertEquals(0.0, v, 1e-7); |
| v = Math.sin(Math.PI * 1.5); |
| assertEquals(-1.0, v, 1e-7); |
| v = Math.sin(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.sin(Double.NEGATIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| v = Math.sin(Double.POSITIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| } |
| |
| public void testSinh() { |
| double v = Math.sinh(0.0); |
| assertEquals(0.0, v); |
| v = Math.sinh(1.0); |
| assertEquals(1.175201193, v, 1e-7); |
| v = Math.sinh(-1.0); |
| assertEquals(-1.175201193, v, 1e-7); |
| v = Math.sinh(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.sinh(Double.NEGATIVE_INFINITY); |
| assertEquals(Double.NEGATIVE_INFINITY, v); |
| v = Math.sinh(Double.POSITIVE_INFINITY); |
| assertEquals(Double.POSITIVE_INFINITY, v); |
| v = Math.sinh(-0.0); |
| assertEquals(-0.0, v); |
| } |
| |
| public void testTan() { |
| double v = Math.tan(0.0); |
| assertEquals(0.0, v, 1e-7); |
| v = Math.tan(-0.0); |
| assertEquals(-0.0, v, 1e-7); |
| v = Math.tan(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.tan(Double.NEGATIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| v = Math.tan(Double.POSITIVE_INFINITY); |
| assertTrue(Double.isNaN(v)); |
| } |
| |
| public void testTanh() { |
| double v = Math.tanh(0.0); |
| assertEquals(0.0, v); |
| v = Math.tanh(1.0); |
| assertEquals(0.761594155, v, 1e-7); |
| v = Math.tanh(-1.0); |
| assertEquals(-0.761594155, v, 1e-7); |
| v = Math.tanh(Double.NaN); |
| assertTrue(Double.isNaN(v)); |
| v = Math.tanh(Double.NEGATIVE_INFINITY); |
| assertEquals(-1.0, v, 1e-7); |
| v = Math.tanh(Double.POSITIVE_INFINITY); |
| assertEquals(1.0, v, 1e-7); |
| v = Math.tanh(-0.0); |
| assertEquals(-0.0, v); |
| } |
| } |