| /* |
| * Copyright (C) 2008 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; |
| |
| /** |
| * Tests for basic functionality of floats and doubles. |
| */ |
| public class OldAndroidFloatDoubleTest extends TestCase { |
| |
| public void testFloatDouble() throws Exception { |
| Double d = Double.valueOf(1.0); |
| Float f = Float.valueOf(1.0f); |
| Object o = new Object(); |
| |
| assertFalse(f.equals(d)); |
| assertFalse(d.equals(f)); |
| assertFalse(f.equals(o)); |
| assertFalse(d.equals(o)); |
| assertFalse(f.equals(null)); |
| assertFalse(d.equals(null)); |
| } |
| |
| public void testFloat() throws Exception { |
| float pz = 0.0f; |
| float nz = -0.0f; |
| |
| float pzero = 1.0f / Float.POSITIVE_INFINITY; |
| float nzero = 1.0f / Float.NEGATIVE_INFINITY; |
| |
| // Everything compares as '==' |
| assertTrue(pz == pz); |
| assertTrue(pz == nz); |
| assertTrue(pz == pzero); |
| assertTrue(pz == nzero); |
| |
| assertTrue(nz == pz); |
| assertTrue(nz == nz); |
| assertTrue(nz == pzero); |
| assertTrue(nz == nzero); |
| |
| assertTrue(pzero == pz); |
| assertTrue(pzero == nz); |
| assertTrue(pzero == pzero); |
| assertTrue(pzero == nzero); |
| |
| assertTrue(nzero == pz); |
| assertTrue(nzero == nz); |
| assertTrue(nzero == pzero); |
| assertTrue(nzero == nzero); |
| |
| // +-0 are distinct as Floats |
| assertEquals(Float.valueOf(pz), Float.valueOf(pz)); |
| assertTrue(!Float.valueOf(pz).equals(Float.valueOf(nz))); |
| assertEquals(Float.valueOf(pz), Float.valueOf(pzero)); |
| assertTrue(!Float.valueOf(pz).equals(Float.valueOf(nzero))); |
| |
| assertTrue(!Float.valueOf(nz).equals(Float.valueOf(pz))); |
| assertEquals(Float.valueOf(nz), Float.valueOf(nz)); |
| assertTrue(!Float.valueOf(nz).equals(Float.valueOf(pzero))); |
| assertEquals(Float.valueOf(nz), Float.valueOf(nzero)); |
| |
| assertEquals(Float.valueOf(pzero), Float.valueOf(pz)); |
| assertTrue(!Float.valueOf(pzero).equals(Float.valueOf(nz))); |
| assertEquals(Float.valueOf(pzero), Float.valueOf(pzero)); |
| assertTrue(!Float.valueOf(pzero).equals(Float.valueOf(nzero))); |
| |
| assertTrue(!Float.valueOf(nzero).equals(Float.valueOf(pz))); |
| assertEquals(Float.valueOf(nzero), Float.valueOf(nz)); |
| assertTrue(!Float.valueOf(nzero).equals(Float.valueOf(pzero))); |
| assertEquals(Float.valueOf(nzero), Float.valueOf(nzero)); |
| |
| // Nan's compare as equal |
| Float sqrtm2 = Float.valueOf((float) Math.sqrt(-2.0f)); |
| Float sqrtm3 = Float.valueOf((float) Math.sqrt(-3.0f)); |
| assertEquals(sqrtm2, sqrtm3); |
| } |
| |
| public void testDouble() throws Exception { |
| double pz = 0.0; |
| double nz = -0.0; |
| |
| double pzero = 1.0 / Double.POSITIVE_INFINITY; |
| double nzero = 1.0 / Double.NEGATIVE_INFINITY; |
| |
| // Everything compares as '==' |
| assertTrue(pz == pz); |
| assertTrue(pz == nz); |
| assertTrue(pz == pzero); |
| assertTrue(pz == nzero); |
| |
| assertTrue(nz == pz); |
| assertTrue(nz == nz); |
| assertTrue(nz == pzero); |
| assertTrue(nz == nzero); |
| |
| assertTrue(pzero == pz); |
| assertTrue(pzero == nz); |
| assertTrue(pzero == pzero); |
| assertTrue(pzero == nzero); |
| |
| assertTrue(nzero == pz); |
| assertTrue(nzero == nz); |
| assertTrue(nzero == pzero); |
| assertTrue(nzero == nzero); |
| |
| // +-0 are distinct as Doubles |
| assertEquals(Double.valueOf(pz), Double.valueOf(pz)); |
| assertTrue(!Double.valueOf(pz).equals(Double.valueOf(nz))); |
| assertEquals(Double.valueOf(pz), Double.valueOf(pzero)); |
| assertTrue(!Double.valueOf(pz).equals(Double.valueOf(nzero))); |
| |
| assertTrue(!Double.valueOf(nz).equals(Double.valueOf(pz))); |
| assertEquals(Double.valueOf(nz), Double.valueOf(nz)); |
| assertTrue(!Double.valueOf(nz).equals(Double.valueOf(pzero))); |
| assertEquals(Double.valueOf(nz), Double.valueOf(nzero)); |
| |
| assertEquals(Double.valueOf(pzero), Double.valueOf(pz)); |
| assertTrue(!Double.valueOf(pzero).equals(Double.valueOf(nz))); |
| assertEquals(Double.valueOf(pzero), Double.valueOf(pzero)); |
| assertTrue(!Double.valueOf(pzero).equals(Double.valueOf(nzero))); |
| |
| assertTrue(!Double.valueOf(nzero).equals(Double.valueOf(pz))); |
| assertEquals(Double.valueOf(nzero), Double.valueOf(nz)); |
| assertTrue(!Double.valueOf(nzero).equals(Double.valueOf(pzero))); |
| assertEquals(Double.valueOf(nzero), Double.valueOf(nzero)); |
| |
| // Nan's compare as equal |
| Double sqrtm2 = Double.valueOf(Math.sqrt(-2.0)); |
| Double sqrtm3 = Double.valueOf(Math.sqrt(-3.0)); |
| assertEquals(sqrtm2, sqrtm3); |
| } |
| } |