/*
* 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 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;
}
}
}