| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.harmony.tests.java.nio; |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.DoubleBuffer; |
| import java.nio.InvalidMarkException; |
| |
| /** |
| * Tests java.nio.DoubleBuffer |
| */ |
| public class DoubleBufferTest extends AbstractBufferTest { |
| |
| protected static final int SMALL_TEST_LENGTH = 5; |
| |
| protected static final int BUFFER_LENGTH = 20; |
| |
| protected DoubleBuffer buf; |
| |
| protected void setUp() throws Exception { |
| buf = DoubleBuffer.allocate(BUFFER_LENGTH); |
| loadTestData1(buf); |
| baseBuf = buf; |
| } |
| |
| protected void tearDown() throws Exception { |
| buf = null; |
| baseBuf = null; |
| } |
| |
| /* |
| * Test with bit sequences that represent the IEEE754 doubles Positive |
| * infinity, negative infinity, and NaN. |
| */ |
| public void testNaNs() { |
| long[] nans = new long[] { 0x7ff0000000000000L, 0xfff0000000000000L, |
| 0x7ff8000000000000L }; |
| for (int i = 0; i < nans.length; i++) { |
| long longBitsIn = nans[i]; |
| double dbl = Double.longBitsToDouble(longBitsIn); |
| long longBitsOut = Double.doubleToRawLongBits(dbl); |
| // Sanity check |
| assertTrue(longBitsIn == longBitsOut); |
| |
| // Store the double and retrieve it |
| ByteBuffer buffer = ByteBuffer.allocate(8); |
| buffer.putDouble(dbl); |
| double bufDoubleOut = buffer.getDouble(0); |
| |
| // Check the bits sequence was not normalized |
| long bufLongOut = Double.doubleToRawLongBits(bufDoubleOut); |
| assertTrue(longBitsIn == bufLongOut); |
| } |
| } |
| |
| public void testArray() { |
| double array[] = buf.array(); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData1(array, buf.arrayOffset(), buf.capacity()); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData2(array, buf.arrayOffset(), buf.capacity()); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData1(buf); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData2(buf); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| } |
| |
| public void testArrayOffset() { |
| double array[] = buf.array(); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData1(array, buf.arrayOffset(), buf.capacity()); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData2(array, buf.arrayOffset(), buf.capacity()); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData1(buf); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| |
| loadTestData2(buf); |
| assertContentEquals(buf, array, buf.arrayOffset(), buf.capacity()); |
| } |
| |
| public void testAsReadOnlyBuffer() { |
| buf.clear(); |
| buf.mark(); |
| buf.position(buf.limit()); |
| |
| // readonly's contents should be the same as buf |
| DoubleBuffer readonly = buf.asReadOnlyBuffer(); |
| assertNotSame(buf, readonly); |
| assertTrue(readonly.isReadOnly()); |
| assertEquals(buf.position(), readonly.position()); |
| assertEquals(buf.limit(), readonly.limit()); |
| assertEquals(buf.isDirect(), readonly.isDirect()); |
| assertEquals(buf.order(), readonly.order()); |
| assertContentEquals(buf, readonly); |
| |
| // readonly's position, mark, and limit should be independent to buf |
| readonly.reset(); |
| assertEquals(readonly.position(), 0); |
| readonly.clear(); |
| assertEquals(buf.position(), buf.limit()); |
| buf.reset(); |
| assertEquals(buf.position(), 0); |
| } |
| |
| public void testCompact() { |
| // case: buffer is full |
| buf.clear(); |
| buf.mark(); |
| loadTestData1(buf); |
| DoubleBuffer ret = buf.compact(); |
| assertSame(ret, buf); |
| assertEquals(buf.position(), buf.capacity()); |
| assertEquals(buf.limit(), buf.capacity()); |
| assertContentLikeTestData1(buf, 0, 0.0, buf.capacity()); |
| try { |
| buf.reset(); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (InvalidMarkException e) { |
| // expected |
| } |
| |
| // case: buffer is empty |
| buf.position(0); |
| buf.limit(0); |
| buf.mark(); |
| ret = buf.compact(); |
| assertSame(ret, buf); |
| assertEquals(buf.position(), 0); |
| assertEquals(buf.limit(), buf.capacity()); |
| assertContentLikeTestData1(buf, 0, 0.0, buf.capacity()); |
| try { |
| buf.reset(); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (InvalidMarkException e) { |
| // expected |
| } |
| |
| // case: normal |
| assertTrue(buf.capacity() > 5); |
| buf.position(1); |
| buf.limit(5); |
| buf.mark(); |
| ret = buf.compact(); |
| assertSame(ret, buf); |
| assertEquals(buf.position(), 4); |
| assertEquals(buf.limit(), buf.capacity()); |
| assertContentLikeTestData1(buf, 0, 1.0, 4); |
| try { |
| buf.reset(); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (InvalidMarkException e) { |
| // expected |
| } |
| } |
| |
| public void testCompareTo() { |
| DoubleBuffer other = DoubleBuffer.allocate(buf.capacity()); |
| loadTestData1(other); |
| assertEquals(0, buf.compareTo(other)); |
| assertEquals(0, other.compareTo(buf)); |
| buf.position(1); |
| assertTrue(buf.compareTo(other) > 0); |
| assertTrue(other.compareTo(buf) < 0); |
| other.position(2); |
| assertTrue(buf.compareTo(other) < 0); |
| assertTrue(other.compareTo(buf) > 0); |
| buf.position(2); |
| other.limit(5); |
| assertTrue(buf.compareTo(other) > 0); |
| assertTrue(other.compareTo(buf) < 0); |
| |
| DoubleBuffer dbuffer1 = DoubleBuffer.wrap(new double[] { Double.NaN }); |
| DoubleBuffer dbuffer2 = DoubleBuffer.wrap(new double[] { Double.NaN }); |
| DoubleBuffer dbuffer3 = DoubleBuffer.wrap(new double[] { 42d }); |
| |
| assertEquals("Failed equal comparison with NaN entry", 0, dbuffer1 |
| .compareTo(dbuffer2)); |
| assertEquals("Failed greater than comparison with NaN entry", -1, dbuffer3 |
| .compareTo(dbuffer1)); |
| assertEquals("Failed greater than comparison with NaN entry", 1, dbuffer1 |
| .compareTo(dbuffer3)); |
| } |
| |
| public void testCompareTo_positiveAndNegativeZero() { |
| double negativeZero = Double.parseDouble("-0"); |
| double positiveZero = Double.parseDouble("+0"); |
| DoubleBuffer negativeZeroBuffer = DoubleBuffer.wrap(new double[] { negativeZero }); |
| DoubleBuffer positiveZeroBuffer = DoubleBuffer.wrap(new double[] { positiveZero }); |
| assertTrue(Double.compare(negativeZero, positiveZero) < 0); // sanity check |
| |
| // Unlike Double.compare(), DoubleBuffer.compareTo() considers -0 == +0 |
| assertEquals(0, negativeZeroBuffer.compareTo(positiveZeroBuffer)); |
| } |
| |
| public void testDuplicate() { |
| buf.clear(); |
| buf.mark(); |
| buf.position(buf.limit()); |
| |
| // duplicate's contents should be the same as buf |
| DoubleBuffer duplicate = buf.duplicate(); |
| assertNotSame(buf, duplicate); |
| assertEquals(buf.position(), duplicate.position()); |
| assertEquals(buf.limit(), duplicate.limit()); |
| assertEquals(buf.isReadOnly(), duplicate.isReadOnly()); |
| assertEquals(buf.isDirect(), duplicate.isDirect()); |
| assertEquals(buf.order(), duplicate.order()); |
| assertContentEquals(buf, duplicate); |
| |
| // duplicate's position, mark, and limit should be independent to buf |
| duplicate.reset(); |
| assertEquals(duplicate.position(), 0); |
| duplicate.clear(); |
| assertEquals(buf.position(), buf.limit()); |
| buf.reset(); |
| assertEquals(buf.position(), 0); |
| |
| // duplicate share the same content with buf |
| // FIXME |
| if (!duplicate.isReadOnly()) { |
| loadTestData1(buf); |
| assertContentEquals(buf, duplicate); |
| loadTestData2(duplicate); |
| assertContentEquals(buf, duplicate); |
| } |
| } |
| |
| public void testEquals() { |
| // equal to self |
| assertTrue(buf.equals(buf)); |
| DoubleBuffer readonly = buf.asReadOnlyBuffer(); |
| assertTrue(buf.equals(readonly)); |
| DoubleBuffer duplicate = buf.duplicate(); |
| assertTrue(buf.equals(duplicate)); |
| |
| // always false, if type mismatch |
| assertFalse(buf.equals(Boolean.TRUE)); |
| |
| assertTrue(buf.capacity() > 5); |
| |
| buf.limit(buf.capacity()).position(0); |
| readonly.limit(readonly.capacity()).position(1); |
| assertFalse(buf.equals(readonly)); |
| |
| buf.limit(buf.capacity() - 1).position(0); |
| duplicate.limit(duplicate.capacity()).position(0); |
| assertFalse(buf.equals(duplicate)); |
| } |
| |
| /* |
| * Class under test for double get() |
| */ |
| public void testGet() { |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), i); |
| assertEquals(buf.get(), buf.get(i), 0.01); |
| } |
| try { |
| buf.get(); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferUnderflowException e) { |
| // expected |
| } |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer get(double[]) |
| */ |
| public void testGetdoubleArray() { |
| double array[] = new double[1]; |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), i); |
| DoubleBuffer ret = buf.get(array); |
| assertEquals(array[0], buf.get(i), 0.01); |
| assertSame(ret, buf); |
| } |
| try { |
| buf.get(array); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferUnderflowException e) { |
| // expected |
| } |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer get(double[], int, int) |
| */ |
| public void testGetdoubleArrayintint() { |
| buf.clear(); |
| double array[] = new double[buf.capacity()]; |
| |
| try { |
| buf.get(new double[buf.capacity() + 1], 0, buf.capacity() + 1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferUnderflowException e) { |
| // expected |
| } |
| assertEquals(buf.position(), 0); |
| try { |
| buf.get(array, -1, array.length); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| buf.get(array, array.length, 0); |
| try { |
| buf.get(array, array.length + 1, 1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| assertEquals(buf.position(), 0); |
| try { |
| buf.get(array, 2, -1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.get((double[])null, 0, -1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (NullPointerException e) { |
| // expected |
| } |
| try { |
| buf.get(array, 2, array.length); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.get(array, 1, Integer.MAX_VALUE); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferUnderflowException expected) { |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| try { |
| buf.get(array, Integer.MAX_VALUE, 1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| assertEquals(buf.position(), 0); |
| |
| buf.clear(); |
| DoubleBuffer ret = buf.get(array, 0, array.length); |
| assertEquals(buf.position(), buf.capacity()); |
| assertContentEquals(buf, array, 0, array.length); |
| assertSame(ret, buf); |
| } |
| |
| /* |
| * Class under test for double get(int) |
| */ |
| public void testGetint() { |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), i); |
| assertEquals(buf.get(), buf.get(i), 0.01); |
| } |
| try { |
| buf.get(-1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.get(buf.limit()); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| } |
| |
| public void testHasArray() { |
| assertTrue(buf.hasArray()); |
| } |
| |
| public void testHashCode() { |
| buf.clear(); |
| DoubleBuffer readonly = buf.asReadOnlyBuffer(); |
| DoubleBuffer duplicate = buf.duplicate(); |
| assertTrue(buf.hashCode() == readonly.hashCode()); |
| |
| assertTrue(buf.capacity() > 5); |
| duplicate.position(buf.capacity() / 2); |
| assertTrue(buf.hashCode() != duplicate.hashCode()); |
| } |
| |
| public void testIsDirect() { |
| assertFalse(buf.isDirect()); |
| } |
| |
| public void testOrder() { |
| assertEquals(ByteOrder.nativeOrder(), buf.order()); |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer put(double) |
| */ |
| public void testPutdouble() { |
| |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), i); |
| DoubleBuffer ret = buf.put((double) i); |
| assertEquals(buf.get(i), (double) i, 0.0); |
| assertSame(ret, buf); |
| } |
| try { |
| buf.put(0); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferOverflowException e) { |
| // expected |
| } |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer put(double[]) |
| */ |
| public void testPutdoubleArray() { |
| double array[] = new double[1]; |
| |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), i); |
| array[0] = (double) i; |
| DoubleBuffer ret = buf.put(array); |
| assertEquals(buf.get(i), (double) i, 0.0); |
| assertSame(ret, buf); |
| } |
| try { |
| buf.put(array); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferOverflowException e) { |
| // expected |
| } |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer put(double[], int, int) |
| */ |
| public void testPutdoubleArrayintint() { |
| buf.clear(); |
| double array[] = new double[buf.capacity()]; |
| |
| try { |
| buf.put(new double[buf.capacity() + 1], 0, buf.capacity() + 1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferOverflowException e) { |
| // expected |
| } |
| assertEquals(buf.position(), 0); |
| try { |
| buf.put(array, -1, array.length); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.put(array, array.length + 1, 0); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| buf.put(array, array.length, 0); |
| assertEquals(buf.position(), 0); |
| try { |
| buf.put(array, 0, -1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.put((double[])null, 0, -1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (NullPointerException e) { |
| // expected |
| } |
| try { |
| buf.put(array, 2, array.length); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.put(array, Integer.MAX_VALUE, 1); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.put(array, 1, Integer.MAX_VALUE); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferOverflowException expected) { |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| assertEquals(buf.position(), 0); |
| |
| loadTestData2(array, 0, array.length); |
| DoubleBuffer ret = buf.put(array, 0, array.length); |
| assertEquals(buf.position(), buf.capacity()); |
| assertContentEquals(buf, array, 0, array.length); |
| assertSame(ret, buf); |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer put(java.nio.DoubleBuffer) |
| */ |
| public void testPutDoubleBuffer() { |
| DoubleBuffer other = DoubleBuffer.allocate(buf.capacity()); |
| |
| try { |
| buf.put(buf); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IllegalArgumentException e) { |
| // expected |
| } |
| try { |
| buf.put(DoubleBuffer.allocate(buf.capacity() + 1)); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (BufferOverflowException e) { |
| // expected |
| } |
| |
| loadTestData2(other); |
| other.clear(); |
| buf.clear(); |
| DoubleBuffer ret = buf.put(other); |
| assertEquals(other.position(), other.capacity()); |
| assertEquals(buf.position(), buf.capacity()); |
| assertContentEquals(other, buf); |
| assertSame(ret, buf); |
| } |
| |
| /* |
| * Class under test for java.nio.DoubleBuffer put(int, double) |
| */ |
| public void testPutintdouble() { |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.position(), 0); |
| DoubleBuffer ret = buf.put(i, (double) i); |
| assertEquals(buf.get(i), (double) i, 0.0); |
| assertSame(ret, buf); |
| } |
| try { |
| buf.put(-1, 0); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| try { |
| buf.put(buf.limit(), 0); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (IndexOutOfBoundsException e) { |
| // expected |
| } |
| } |
| |
| public void testSlice() { |
| assertTrue(buf.capacity() > 5); |
| buf.position(1); |
| buf.limit(buf.capacity() - 1); |
| |
| DoubleBuffer slice = buf.slice(); |
| assertEquals(buf.isReadOnly(), slice.isReadOnly()); |
| assertEquals(buf.isDirect(), slice.isDirect()); |
| assertEquals(buf.order(), slice.order()); |
| assertEquals(slice.position(), 0); |
| assertEquals(slice.limit(), buf.remaining()); |
| assertEquals(slice.capacity(), buf.remaining()); |
| try { |
| slice.reset(); |
| fail("Should throw Exception"); //$NON-NLS-1$ |
| } catch (InvalidMarkException e) { |
| // expected |
| } |
| |
| // slice share the same content with buf |
| // FIXME: |
| if (!slice.isReadOnly()) { |
| loadTestData1(slice); |
| assertContentLikeTestData1(buf, 1, 0, slice.capacity()); |
| buf.put(2, 500); |
| assertEquals(slice.get(1), 500, 0.0); |
| } |
| } |
| |
| public void testToString() { |
| String str = buf.toString(); |
| assertTrue(str.indexOf("Double") >= 0 || str.indexOf("double") >= 0); |
| assertTrue(str.indexOf("" + buf.position()) >= 0); |
| assertTrue(str.indexOf("" + buf.limit()) >= 0); |
| assertTrue(str.indexOf("" + buf.capacity()) >= 0); |
| } |
| |
| void loadTestData1(double array[], int offset, int length) { |
| for (int i = 0; i < length; i++) { |
| array[offset + i] = (double) i; |
| } |
| } |
| |
| void loadTestData2(double array[], int offset, int length) { |
| for (int i = 0; i < length; i++) { |
| array[offset + i] = (double) length - i; |
| } |
| } |
| |
| void loadTestData1(DoubleBuffer buf) { |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| buf.put(i, (double) i); |
| } |
| } |
| |
| void loadTestData2(DoubleBuffer buf) { |
| buf.clear(); |
| for (int i = 0; i < buf.capacity(); i++) { |
| buf.put(i, (double) buf.capacity() - i); |
| } |
| } |
| |
| private void assertContentEquals(DoubleBuffer buf, double array[], |
| int offset, int length) { |
| for (int i = 0; i < length; i++) { |
| assertEquals(buf.get(i), array[offset + i], 0.01); |
| } |
| } |
| |
| private void assertContentEquals(DoubleBuffer buf, DoubleBuffer other) { |
| assertEquals(buf.capacity(), other.capacity()); |
| for (int i = 0; i < buf.capacity(); i++) { |
| assertEquals(buf.get(i), other.get(i), 0.01); |
| } |
| } |
| |
| private void assertContentLikeTestData1(DoubleBuffer buf, int startIndex, |
| double startValue, int length) { |
| double value = startValue; |
| for (int i = 0; i < length; i++) { |
| assertEquals(buf.get(startIndex + i), value, 0.01); |
| value = value + 1.0; |
| } |
| } |
| } |