/*
* 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 tests.api.java.io;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import tests.support.Support_ASimpleInputStream;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;
import dalvik.annotation.TestTargetNew;
@TestTargetClass(SequenceInputStream.class)
public class SequenceInputStreamTest extends junit.framework.TestCase {
Support_ASimpleInputStream simple1, simple2;
SequenceInputStream si;
String s1 = "Hello";
String s2 = "World";
/**
* @tests SequenceInputStream#SequenceInputStream(java.io.InputStream,
* java.io.InputStream)
*/
@TestTargetNew(
level = TestLevel.SUFFICIENT,
notes = "Checks NullPointerException. A positive test of this " +
"constructor is implicitely done in setUp(); if it would " +
"fail, all other tests will also fail.",
method = "SequenceInputStream",
args = {java.io.InputStream.class, java.io.InputStream.class}
)
public void test_Constructor_LInputStreamLInputStream_Null() {
try {
si = new SequenceInputStream(null , null);
fail("Test 1: NullPointerException expected.");
} catch (NullPointerException e) {
// Expected.
}
//will not throw NullPointerException if the first InputStream is not null
InputStream is = new ByteArrayInputStream(s1.getBytes());
si = new SequenceInputStream(is , null);
}
/**
* @tests java.io.SequenceInputStream#SequenceInputStream(java.util.Enumeration)
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "SequenceInputStream",
args = {java.util.Enumeration.class}
)
public void test_ConstructorLjava_util_Enumeration() {
// Test for method java.io.SequenceInputStream(java.util.Enumeration)
class StreamEnumerator implements Enumeration<InputStream> {
InputStream streams[] = new InputStream[2];
int count = 0;
public StreamEnumerator() {
streams[0] = new ByteArrayInputStream(s1.getBytes());
streams[1] = new ByteArrayInputStream(s2.getBytes());
}
public boolean hasMoreElements() {
return count < streams.length;
}
public InputStream nextElement() {
return streams[count++];
}
}
try {
si = new SequenceInputStream(new StreamEnumerator());
byte buf[] = new byte[s1.length() + s2.length()];
si.read(buf, 0, s1.length());
si.read(buf, s1.length(), s2.length());
assertTrue("Read incorrect bytes: " + new String(buf), new String(
buf).equals(s1 + s2));
} catch (IOException e) {
fail("IOException during read test : " + e.getMessage());
}
}
/**
* @throws IOException
* @tests java.io.SequenceInputStream#available()
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "available",
args = {}
)
public void test_available() throws IOException {
assertEquals("Returned incorrect number of bytes!", s1.length(), si.available());
simple2.throwExceptionOnNextUse = true;
assertTrue("IOException on second stream should not affect at this time!",
si.available() == s1.length());
simple1.throwExceptionOnNextUse = true;
try {
si.available();
fail("IOException not thrown!");
} catch (IOException e) {
// expected
}
}
/**
* @tests java.io.SequenceInputStream#close()
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "",
method = "close",
args = {}
)
public void test_close() throws IOException {
assertTrue("Something is available!", si.available() > 0);
si.close();
//will not throw IOException to close a stream which is closed already
si.close();
assertTrue("Nothing is available, now!", si.available() <= 0);
// assertEquals("And not on the underlying streams either!", 0, simple1.available());
// assertTrue("And not on the underlying streams either!", simple1.available() <= 0);
// assertTrue("And not on the underlying streams either!", simple2.available() <= 0);
}
/**
* @tests java.io.SequenceInputStream#close()
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "",
method = "close",
args = {}
)
public void test_close2() throws IOException {
simple1.throwExceptionOnNextUse = true;
try {
si.close();
fail("IOException not thrown!");
} catch (IOException e) {
// expected
}
}
/**
* @tests java.io.SequenceInputStream#read()
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "read",
args = {}
)
public void test_read() throws IOException {
si.read();
assertEquals("Test 1: Incorrect char read;",
s1.charAt(1), (char) si.read());
// We are still reading from the first input stream, should be ok.
simple2.throwExceptionOnNextUse = true;
try {
assertEquals("Test 2: Incorrect char read;",
s1.charAt(2), (char) si.read());
} catch (IOException e) {
fail("Test 3: Unexpected IOException.");
}
simple1.throwExceptionOnNextUse = true;
try {
si.read();
fail("Test 4: IOException expected.");
} catch (IOException e) {
// Expected.
}
simple1.throwExceptionOnNextUse = false;
// Reading bytes 4 and 5 of the first input stream should be ok again.
si.read();
si.read();
// Reading the first byte of the second input stream should fail.
try {
si.read();
fail("Test 5: IOException expected.");
} catch (IOException e) {
// Expected.
}
// Reading from the second input stream should be ok now.
simple2.throwExceptionOnNextUse = false;
try {
assertEquals("Test 6: Incorrect char read;",
s2.charAt(0), (char) si.read());
} catch (IOException e) {
fail("Test 7: Unexpected IOException.");
}
si.close();
assertTrue("Test 8: -1 expected when reading from a closed " +
"sequence input stream.", si.read() == -1);
}
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "",
method = "read",
args = {byte[].class, int.class, int.class}
)
public void test_read_exc() throws IOException {
simple2.throwExceptionOnNextUse = true;
assertEquals("IOException on second stream should not affect at this time!", 72, si.read());
simple1.throwExceptionOnNextUse = true;
try {
si.read();
fail("IOException not thrown!");
} catch (IOException e) {
// expected
}
}
/**
* @tests java.io.SequenceInputStream#read(byte[], int, int)
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "",
method = "read",
args = {byte[].class, int.class, int.class}
)
public void test_read$BII() throws IOException {
// Test for method int java.io.SequenceInputStream.read(byte [], int,
// int)
try {
byte buf[] = new byte[s1.length() + s2.length()];
si.read(buf, 0, s1.length());
si.read(buf, s1.length(), s2.length());
assertTrue("Read incorrect bytes: " + new String(buf), new String(
buf).equals(s1 + s2));
} catch (IOException e) {
fail("IOException during read test : " + e.getMessage());
}
ByteArrayInputStream bis1 = new ByteArrayInputStream(
new byte[] { 1, 2, 3, 4 });
ByteArrayInputStream bis2 = new ByteArrayInputStream(
new byte[] { 5, 6, 7, 8 });
SequenceInputStream sis = new SequenceInputStream(bis1, bis2);
try {
sis.read(null, 0, 2);
fail("Expected NullPointerException exception");
} catch (NullPointerException e) {
// expected
}
assertEquals(4, sis.read(new byte[10], 0, 8));
// The call to read will return after the end of the first substream is
// reached. So the next call to read will close the first substream
// because the read call to that substream will return -1, and
// it will continue reading from the second substream.
assertEquals(5, sis.read());
//returns -1 if the stream is closed , do not throw IOException
byte[] array = new byte[] { 1 , 2 , 3 ,4 };
sis.close();
int result = sis.read(array , 0 , 5);
assertEquals(-1 , result);
}
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "",
method = "read",
args = {byte[].class, int.class, int.class}
)
public void test_read$BII_Excpetion() throws IOException {
byte[] buf = new byte[4];
si.read(buf, 0, 2);
si.read(buf, 2, 1);
simple2.throwExceptionOnNextUse = true;
si.read(buf, 3, 1);
assertEquals("Wrong stuff read!", "Hell", new String(buf));
simple1.throwExceptionOnNextUse = true;
try {
si.read(buf, 3, 1);
fail("IOException not thrown!");
} catch (IOException e) {
// expected
}
buf = new byte[10];
simple1 = new Support_ASimpleInputStream(s1);
simple2 = new Support_ASimpleInputStream(s2);
si = new SequenceInputStream(simple1, simple2);
try {
si.read(buf, -1, 1);
fail("IndexOutOfBoundsException was not thrown");
} catch (IndexOutOfBoundsException e) {
// Expected
}
try {
si.read(buf, 0, -1);
fail("IndexOutOfBoundsException was not thrown");
} catch (IndexOutOfBoundsException e) {
// Expected
}
try {
si.read(buf, 1, 10);
fail("IndexOutOfBoundsException was not thrown");
} catch (IndexOutOfBoundsException e) {
// Expected
}
}
/**
* Sets up the fixture, for example, open a network connection. This method
* is called before a test is executed.
*/
protected void setUp() {
simple1 = new Support_ASimpleInputStream(s1);
simple2 = new Support_ASimpleInputStream(s2);
si = new SequenceInputStream(simple1, simple2);
}
/**
* Tears down the fixture, for example, close a network connection. This
* method is called after a test is executed.
*/
protected void tearDown() {
}
}