| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * 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 libcore.java.lang; |
| |
| import junit.framework.TestCase; |
| |
| public class DoubleTest extends TestCase { |
| public void testDoubleToStringUnsignedDivide() throws Exception { |
| // http://b/3238333 |
| assertEquals("0.008", Double.toString(0.008)); |
| assertEquals("0.008366", Double.toString(0.008366)); |
| // http://code.google.com/p/android/issues/detail?id=14033 |
| assertEquals("0.009", Double.toString(0.009)); |
| // http://code.google.com/p/android/issues/detail?id=14302 |
| assertEquals("0.008567856012638986", Double.toString(0.008567856012638986)); |
| assertEquals("0.010206713752229896", Double.toString(0.010206713752229896)); |
| } |
| |
| public void testNamedDoubles() throws Exception { |
| assertEquals(Double.NaN, Double.parseDouble("NaN")); |
| assertEquals(Double.NaN, Double.parseDouble("-NaN")); |
| assertEquals(Double.NaN, Double.parseDouble("+NaN")); |
| try { |
| Double.parseDouble("NNaN"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| try { |
| Double.parseDouble("NaNN"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| |
| assertEquals(Double.POSITIVE_INFINITY, Double.parseDouble("+Infinity")); |
| assertEquals(Double.POSITIVE_INFINITY, Double.parseDouble("Infinity")); |
| assertEquals(Double.NEGATIVE_INFINITY, Double.parseDouble("-Infinity")); |
| try { |
| Double.parseDouble("IInfinity"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| try { |
| Double.parseDouble("Infinityy"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| } |
| |
| public void testSuffixParsing() throws Exception { |
| String[] badStrings = { "1ff", "1fd", "1df", "1dd" }; |
| for (String string : badStrings) { |
| try { |
| Double.parseDouble(string); |
| fail(string); |
| } catch (NumberFormatException expected) { |
| } |
| } |
| assertEquals(1.0, Double.parseDouble("1f")); |
| assertEquals(1.0, Double.parseDouble("1d")); |
| assertEquals(1.0, Double.parseDouble("1F")); |
| assertEquals(1.0, Double.parseDouble("1D")); |
| assertEquals(1.0, Double.parseDouble("1.D")); |
| assertEquals(1.0, Double.parseDouble("1.E0D")); |
| assertEquals(1.0, Double.parseDouble(".1E1D")); |
| } |
| |
| public void testExponentParsing() throws Exception { |
| String[] strings = { |
| // Exponents missing integer values. |
| "1.0e", "1.0e+", "1.0e-", |
| // Exponents with too many explicit signs. |
| "1.0e++1", "1.0e+-1", "1.0e-+1", "1.0e--1", |
| // http://code.google.com/p/android/issues/detail?id=20728 |
| "save+", "save-", |
| }; |
| for (String string : strings) { |
| try { |
| Double.parseDouble(string); |
| fail(string); |
| } catch (NumberFormatException expected) { |
| } |
| } |
| |
| assertEquals(1.0e-323, Double.parseDouble("1.0e-323")); |
| assertEquals(0.0, Double.parseDouble("1.0e-324")); |
| assertEquals(-1.0e-323, Double.parseDouble("-1.0e-323")); |
| assertEquals(-0.0, Double.parseDouble("-1.0e-324")); |
| |
| assertEquals(1.0e+308, Double.parseDouble("1.0e+308")); |
| assertEquals(Double.POSITIVE_INFINITY, Double.parseDouble("1.0e+309")); |
| assertEquals(-1.0e+308, Double.parseDouble("-1.0e+308")); |
| assertEquals(Double.NEGATIVE_INFINITY, Double.parseDouble("-1.0e+309")); |
| |
| assertEquals(Double.POSITIVE_INFINITY, Double.parseDouble("1.0e+9999999999")); |
| assertEquals(Double.NEGATIVE_INFINITY, Double.parseDouble("-1.0e+9999999999")); |
| assertEquals(0.0, Double.parseDouble("1.0e-9999999999")); |
| assertEquals(-0.0, Double.parseDouble("-1.0e-9999999999")); |
| |
| assertEquals(Double.POSITIVE_INFINITY, Double.parseDouble("320.0e+2147483647")); |
| assertEquals(-0.0, Double.parseDouble("-1.4e-2147483314")); |
| } |
| |
| /** |
| * This value has been known to cause javac and java to infinite loop. |
| * http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/ |
| */ |
| public void testParseLargestSubnormalDoublePrecision() { |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("2.2250738585072012e-308")); |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("0.00022250738585072012e-304")); |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("00000002.2250738585072012e-308")); |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("2.225073858507201200000e-308")); |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("2.2250738585072012e-00308")); |
| assertEquals(2.2250738585072014E-308, Double.parseDouble("2.22507385850720129978001e-308")); |
| assertEquals(-2.2250738585072014E-308, Double.parseDouble("-2.2250738585072012e-308")); |
| } |
| } |