| /* |
| * Copyright 2012 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.typedarrays.shared; |
| |
| import com.google.gwt.junit.client.GWTTestCase; |
| |
| /** |
| * Test {@link Float64Array} implementations. |
| */ |
| public class Float64ArrayTest extends GWTTestCase { |
| |
| private static final int BYTES_PER_ELEMENT = Float64Array.BYTES_PER_ELEMENT; |
| |
| @Override |
| public String getModuleName() { |
| // returns null for a pure Java test |
| return null; |
| } |
| |
| public void testBasic() { |
| if (!isSupported()) { |
| // TODO: some way of showing test as skipped in this case? |
| return; |
| } |
| int byteLen = 40; |
| ArrayBuffer buf = TypedArrays.createArrayBuffer(byteLen); |
| assertEquals(byteLen, buf.byteLength()); |
| DataView view = TypedArrays.createDataView(buf); |
| Float64Array array = TypedArrays.createFloat64Array(buf); |
| assertSame(buf, array.buffer()); |
| assertEquals(byteLen, array.byteLength()); |
| assertEquals(0, array.byteOffset()); |
| int len = byteLen / BYTES_PER_ELEMENT; |
| assertEquals(len, array.length()); |
| |
| // check that it is initialized to zeros |
| for (int i = 0; i < len; ++i) { |
| assertEquals(0.0, array.get(i)); |
| } |
| |
| // store some data |
| for (int i = 0; i < len; ++i) { |
| array.set(i, 1 << (i + 1)); |
| } |
| |
| // check the underlying buffer |
| for (int i = 0; i < len; ++i) { |
| assertEquals("Byte " + i + ":0", 0, view.getUint8(i * BYTES_PER_ELEMENT)); |
| assertEquals("Byte " + i + ":1", 0, view.getUint8(i * BYTES_PER_ELEMENT + 1)); |
| assertEquals("Byte " + i + ":2", 0, view.getUint8(i * BYTES_PER_ELEMENT + 2)); |
| assertEquals("Byte " + i + ":3", 0, view.getUint8(i * BYTES_PER_ELEMENT + 3)); |
| assertEquals("Byte " + i + ":4", 0, view.getUint8(i * BYTES_PER_ELEMENT + 4)); |
| assertEquals("Byte " + i + ":5", 0, view.getUint8(i * BYTES_PER_ELEMENT + 5)); |
| assertEquals("Byte " + i + ":6", (i & 15) << 4, |
| view.getUint8(i * BYTES_PER_ELEMENT + 6)); |
| assertEquals("Byte " + i + ":7", 64 + (i >> 4), |
| view.getUint8(i * BYTES_PER_ELEMENT + 7)); |
| } |
| |
| // modify the underlying buffer and read it back |
| view.setFloat64(0, -256, true); |
| view.setInt32(12, 0x0000F03F); |
| view.setInt32(8, 0); |
| assertEquals(-256.0, array.get(0)); |
| assertEquals(1.0, array.get(1)); |
| } |
| |
| public void testSetFromJavaArray() { |
| if (!isSupported()) { |
| // TODO: some way of showing test as skipped in this case? |
| return; |
| } |
| ArrayBuffer buf = TypedArrays.createArrayBuffer(48); |
| Float64Array array = TypedArrays.createFloat64Array(buf); |
| setFromJavaArray(array, 0); |
| validateArrayContents(array, 0); |
| |
| // On Chrome, there is a bug where the first offset is ignored, so this test will fail if there |
| // isn't a test with offset 0 first. |
| // See http://code.google.com/p/chromium/issues/detail?id=109785 |
| buf = TypedArrays.createArrayBuffer(48); |
| array = TypedArrays.createFloat64Array(buf); |
| setFromJavaArray(array, 1); |
| validateArrayContents(array, 1); |
| } |
| |
| /** |
| * Not all browsers support Float64Array despite otherwise supporting typed arrays. |
| * |
| * @return true if the current environment supports Float64Array |
| */ |
| protected boolean isSupported() { |
| return TypedArrays.isSupported(); |
| } |
| |
| protected void setFromJavaArray(Float64Array array, int offset) { |
| double[] values = new double[] { |
| 1.0, Double.NEGATIVE_INFINITY, Double.NaN, Double.MAX_VALUE, |
| }; |
| array.set(values, offset); |
| } |
| |
| protected void validateArrayContents(Float64Array array, int offset) { |
| for (int i = 0; i < offset; ++i) { |
| assertEquals("index " + i, 0.0, array.get(i)); |
| } |
| assertEquals("Index " + offset, 1.0, array.get(offset++)); |
| assertTrue("Index " + offset, Double.isInfinite(array.get(offset))); |
| assertTrue("Index " + offset, array.get(offset++) < 0); |
| assertTrue("Index " + offset, Double.isNaN(array.get(offset++))); |
| assertEquals("Index " + offset, Double.MAX_VALUE, array.get(offset++)); |
| for (int i = offset + 4; i < array.length(); ++i) { |
| assertEquals("index " + i, 0.0, array.get(i)); |
| } |
| } |
| } |