sdk/sources/android-23/org/apache/harmony/tests/java/io/ByteArrayOutputStreamTest.java

/*
 *  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.io;

import java.io.ByteArrayOutputStream;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import junit.framework.TestCase;

/**
 * Automated Test Suite for class java.io.ByteArrayOutputStream
 *
 * @see java.io.ByteArrayOutputStream
 */
public class ByteArrayOutputStreamTest extends TestCase {

    ByteArrayOutputStream bos = null;

    public String fileString = "Test_All_Tests\nTest_java_io_BufferedInputStream\nTest_java_io_BufferedOutputStream\nTest_java_io_ByteArrayInputStream\nTest_ByteArrayOutputStream\nTest_java_io_DataInputStream\n";

    /**
     * Tears down the fixture, for example, close a network connection. This
     * method is called after a test is executed.
     */
    protected void tearDown() throws Exception {
        try {
            bos.close();
        } catch (Exception ignore) {
        }
        super.tearDown();
    }

    /**
     * java.io.ByteArrayOutputStream#ByteArrayOutputStream(int)
     */
    public void test_ConstructorI() {
        bos = new ByteArrayOutputStream(100);
        assertEquals("Failed to create stream", 0, bos.size());
    }

    /**
     * java.io.ByteArrayOutputStream#ByteArrayOutputStream()
     */
    public void test_Constructor() {
        bos = new ByteArrayOutputStream();
        assertEquals("Failed to create stream", 0, bos.size());
    }

    /**
     * java.io.ByteArrayOutputStream#close()
     */
    public void test_close() {
        // close() does nothing for this implementation of OutputSteam

        // The spec seems to say that a closed output stream can't be written
        // to. We don't throw an exception if attempt is made to write.
        // Right now our implementation doesn't do anything testable but
        // should we decide to throw an exception if a closed stream is
        // written to, the appropriate test is commented out below.

        /***********************************************************************
         * java.io.ByteArrayOutputStream bos = new
         * java.io.ByteArrayOutputStream(); bos.write (fileString.getBytes(), 0,
         * 100); try { bos.close(); } catch (java.io.IOException e) {
         * fail("IOException closing stream"); } try { bos.write
         * (fileString.getBytes(), 0, 100); bos.toByteArray(); fail("Wrote to
         * closed stream"); } catch (Exception e) { }
         **********************************************************************/
    }

    /**
     * java.io.ByteArrayOutputStream#reset()
     */
    public void test_reset() {
        bos = new java.io.ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, 100);
        bos.reset();
        assertEquals("reset failed", 0, bos.size());
    }

    /**
     * java.io.ByteArrayOutputStream#size()
     */
    public void test_size() {
        bos = new java.io.ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, 100);
        assertEquals("size test failed", 100, bos.size());
        bos.reset();
        assertEquals("size test failed", 0, bos.size());
    }

    /**
     * java.io.ByteArrayOutputStream#toByteArray()
     */
    public void test_toByteArray() {
        byte[] bytes;
        byte[] sbytes = fileString.getBytes();
        bos = new java.io.ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, fileString.length());
        bytes = bos.toByteArray();
        for (int i = 0; i < fileString.length(); i++) {
            assertTrue("Error in byte array", bytes[i] == sbytes[i]);
        }
    }

    /**
     * java.io.ByteArrayOutputStream#toString(java.lang.String)
     */
    public void test_toStringLjava_lang_String() throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        bos.write(fileString.getBytes("UTF-8"), 0, fileString.length());
        assertTrue("Returned incorrect 8859-1 String", bos.toString("8859_1")
                .equals(fileString));

        bos = new ByteArrayOutputStream();
        bos.write(fileString.getBytes("UTF-8"), 0, fileString.length());
        assertTrue("Returned incorrect 8859-2 String", bos.toString("8859_2")
                .equals(fileString));
    }

    /**
     * java.io.ByteArrayOutputStream#toString()
     */
    public void test_toString() {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, fileString.length());
        assertTrue("Returned incorrect String", bos.toString().equals(
                fileString));
    }

    /**
     * java.io.ByteArrayOutputStream#toString(int)
     */
    @SuppressWarnings("deprecation")
    public void test_toStringI() {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, fileString.length());
        assertTrue("Returned incorrect String",
                bos.toString(5).length() == fileString.length());
    }

    /**
     * java.io.ByteArrayOutputStream#write(int)
     */
    public void test_writeI() throws UnsupportedEncodingException {
        bos = new ByteArrayOutputStream();
        bos.write('t');
        byte[] result = bos.toByteArray();
        assertEquals("Wrote incorrect bytes", "t", new String(result, 0,
                result.length, "UTF-8"));
    }

    /**
     * java.io.ByteArrayOutputStream#write(byte[], int, int)
     */
    public void test_write$BII() {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, 100);
        byte[] result = bos.toByteArray();
        assertTrue("Wrote incorrect bytes",
                new String(result, 0, result.length).equals(fileString
                        .substring(0, 100)));
    }

    /**
     * java.io.ByteArrayOutputStream#write(byte[], int, int)
     */
    public void test_write$BII_2() {
        // Regression for HARMONY-387
        ByteArrayOutputStream obj = new ByteArrayOutputStream();
        try {
            obj.write(new byte[] { (byte) 0x00 }, -1, 0);
            fail();
        } catch (IndexOutOfBoundsException expected) {
        }
    }

    /**
     * java.io.ByteArrayOutputStream#writeTo(java.io.OutputStream)
     */
    public void test_writeToLjava_io_OutputStream() throws Exception {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ByteArrayOutputStream bos2 = new ByteArrayOutputStream();
        bos.write(fileString.getBytes(), 0, 100);
        bos.writeTo(bos2);
        assertTrue("Returned incorrect String", bos2.toString().equals(
                fileString.substring(0, 100)));

        // Regression test for HARMONY-834
        // no exception expected
        new ByteArrayOutputStream().writeTo(new FileOutputStream(
                new FileDescriptor()));
    }
}