/*
* Copyright 2015 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.emultest.java.io;
import com.google.gwt.junit.client.GWTTestCase;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
/**
* Class for reusing tests that are common to {@link java.io.InputStream} and its subclasses.
*/
public abstract class InputStreamBaseTest extends GWTTestCase {
protected static final byte[] TEST_BYTES = new byte[] { 10, 20, 30, 40, 50 };
/**
* Sets module name so that javascript compiler can operate.
*/
@Override
public String getModuleName() {
return "com.google.gwt.emultest.EmulSuite";
}
/**
* Factory method for creating a stream object.
*
* @param expectedBytes expected bytes when reading from the stream.
* @return input stream object to be tested.
*/
protected abstract InputStream createInputStream(byte[] expectedBytes);
public void testReadArrayUsingNullArrayObject() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
try {
inputStream.read(null, 0, 1);
fail("should have thrown NullPointerException");
} catch (NullPointerException expected) {
}
}
public void testReadArrayUsingNegativeOffsetValue() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[1];
try {
inputStream.read(b, -1, 1);
fail("should have thrown IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException expected) {
}
}
public void testReadArrayUsingNegativeLengthValue() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[1];
try {
inputStream.read(b, 0, -1);
fail("should have thrown IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException expected) {
}
}
public void testReadArrayUsingAnInvalidRange() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[1];
try {
inputStream.read(b, 1, 1);
fail("should have thrown IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException expected) {
}
}
public void testReadArrayUsingZeroLength() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[1];
int c = inputStream.read(b, 0, 0);
assertEquals(0, c);
c = inputStream.read(b, 1, 0);
assertEquals(0, c);
}
public void testReadArrayFromEmptyStream() throws IOException {
final InputStream inputStream = createInputStream(new byte[] {});
final byte[] b = new byte[1];
final int c = inputStream.read(b, 0, 1);
assertEquals(-1, c);
}
public void testReadArrayPartial() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[2];
final int result = inputStream.read(b, 1, 1);
assertEquals(1, result);
assertEquals(b[0], 0);
assertEquals(b[1], TEST_BYTES[0]);
}
public void testReadArrayReachEndOfStream() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[TEST_BYTES.length + 5];
final int result = inputStream.read(b, 5, TEST_BYTES.length);
assertEquals(TEST_BYTES.length, result);
final byte[] expected = new byte[b.length];
System.arraycopy(TEST_BYTES, 0, expected, 5, TEST_BYTES.length);
assertTrue(Arrays.equals(expected, b));
}
public void testReadArrayExceedEndOfStream() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[5 + TEST_BYTES.length + 5];
final int result = inputStream.read(b, 5, TEST_BYTES.length + 5);
assertEquals(TEST_BYTES.length, result);
final byte[] expected = new byte[b.length];
System.arraycopy(TEST_BYTES, 0, expected, 5, TEST_BYTES.length);
assertTrue(Arrays.equals(expected, b));
}
public void testReadArrayUsingNullArrayObjectNoOffset() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
try {
inputStream.read(null);
fail("should have thrown NullPointerException");
} catch (NullPointerException expected) {
}
}
public void testReadUsingAnEmptyArrayNoOffset() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[0];
final int c = inputStream.read(b);
assertEquals(0, c);
}
public void testReadArrayFromEmptyStreamNoOffset() throws IOException {
final InputStream inputStream = createInputStream(new byte[] {});
final byte[] b = new byte[1];
final int c = inputStream.read(b);
assertEquals(-1, c);
}
public void testReadArrayPartialNoOffset() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[TEST_BYTES.length / 2];
final int result = inputStream.read(b);
assertEquals(b.length, result);
assertTrue(Arrays.equals(Arrays.copyOf(TEST_BYTES, b.length), b));
}
public void testReadArrayReachEndOfStreamNoOffset() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[TEST_BYTES.length];
final int result = inputStream.read(b);
assertEquals(TEST_BYTES.length, result);
assertTrue(Arrays.equals(TEST_BYTES, b));
}
public void testReadArrayExceedEndOfStreamNoOffset() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
final byte[] b = new byte[TEST_BYTES.length * 2];
final int result = inputStream.read(b);
assertEquals(TEST_BYTES.length, result);
assertTrue(Arrays.equals(Arrays.copyOf(TEST_BYTES, b.length), b));
}
public void testSkipZeroBytes() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
long result = inputStream.skip(0);
assertEquals(0, result);
}
public void testSkipFewBytes() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
long result = inputStream.skip(3);
assertEquals(3, result);
}
public void testSkipReachEndOfStream() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
long result = inputStream.skip(TEST_BYTES.length);
assertEquals(TEST_BYTES.length, result);
}
public void testSkipExceedEndOfStream() throws IOException {
final InputStream inputStream = createInputStream(TEST_BYTES);
long result = inputStream.skip(TEST_BYTES.length + 5);
assertEquals(TEST_BYTES.length, result);
}
}