java/io/DataOutputStreamTest.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.luni.tests.java.io;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class DataOutputStreamTest extends junit.framework.TestCase {

    private DataOutputStream os;

    private DataInputStream dis;

    private ByteArrayOutputStream bos;

    String unihw = "\u0048\u0065\u006C\u006C\u006F\u0020\u0057\u006F\u0072\u006C\u0064";

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

    /**
     * @tests java.io.DataOutputStream#DataOutputStream(java.io.OutputStream)
     */
    public void test_ConstructorLjava_io_OutputStream() {
        assertTrue("Used in all tests", true);
    }

    /**
     * @tests java.io.DataOutputStream#flush()
     */
    public void test_flush() throws IOException {
        os.writeInt(9087589);
        os.flush();
        openDataInputStream();
        int c = dis.readInt();
        dis.close();
        assertEquals("Failed to flush correctly", 9087589, c);
    }

    /**
     * @tests java.io.DataOutputStream#size()
     */
    public void test_size() throws IOException {
        os.write(fileString.getBytes(), 0, 150);
        os.close();
        openDataInputStream();
        byte[] rbuf = new byte[150];
        dis.read(rbuf, 0, 150);
        dis.close();
        assertEquals("Incorrect size returned", 150, os.size());
    }

    /**
     * @tests java.io.DataOutputStream#write(byte[], int, int)
     */
    public void test_write$BII() throws IOException {
        os.write(fileString.getBytes(), 0, 150);
        os.close();
        openDataInputStream();
        byte[] rbuf = new byte[150];
        dis.read(rbuf, 0, 150);
        dis.close();
        assertTrue("Incorrect bytes written", new String(rbuf, 0, 150)
                .equals(fileString.substring(0, 150)));
    }

    /**
     * @tests java.io.DataOutputStream#write(int)
     */
    public void test_writeI() throws IOException {
        os.write((int) 't');
        os.close();
        openDataInputStream();
        int c = dis.read();
        dis.close();
        assertTrue("Incorrect int written", (int) 't' == c);
    }

    /**
     * @tests java.io.DataOutputStream#writeBoolean(boolean)
     */
    public void test_writeBooleanZ() throws IOException {
        os.writeBoolean(true);
        os.close();
        openDataInputStream();
        boolean c = dis.readBoolean();
        dis.close();
        assertTrue("Incorrect boolean written", c);
    }

    /**
     * @tests java.io.DataOutputStream#writeByte(int)
     */
    public void test_writeByteI() throws IOException {
        os.writeByte((byte) 127);
        os.close();
        openDataInputStream();
        byte c = dis.readByte();
        dis.close();
        assertTrue("Incorrect byte written", c == (byte) 127);
    }

    /**
     * @tests java.io.DataOutputStream#writeBytes(java.lang.String)
     */
    public void test_writeBytesLjava_lang_String() throws IOException {
        os.write(fileString.getBytes());
        os.close();
        openDataInputStream();
        byte[] rbuf = new byte[4000];
        dis.read(rbuf, 0, fileString.length());
        dis.close();
        assertTrue("Incorrect bytes written", new String(rbuf, 0, fileString
                .length()).equals(fileString));

        // regression test for HARMONY-1101
        new DataOutputStream(null).writeBytes("");
    }

    /**
     * @tests java.io.DataOutputStream#writeChar(int)
     */
    public void test_writeCharI() throws IOException {
        os.writeChar('T');
        os.close();
        openDataInputStream();
        char c = dis.readChar();
        dis.close();
        assertEquals("Incorrect char written", 'T', c);
    }

    /**
     * @tests java.io.DataOutputStream#writeChars(java.lang.String)
     */
    public void test_writeCharsLjava_lang_String() throws IOException {
        os.writeChars("Test String");
        os.close();
        openDataInputStream();
        char[] chars = new char[50];
        int i, a = dis.available() / 2;
        for (i = 0; i < a; i++)
            chars[i] = dis.readChar();
        assertEquals("Incorrect chars written", "Test String", new String(
                chars, 0, i));
    }

    /**
     * @tests java.io.DataOutputStream#writeDouble(double)
     */
    public void test_writeDoubleD() throws IOException {
        os.writeDouble(908755555456.98);
        os.close();
        openDataInputStream();
        double c = dis.readDouble();
        dis.close();
        assertEquals("Incorrect double written", 908755555456.98, c);
    }

    /**
     * @tests java.io.DataOutputStream#writeFloat(float)
     */
    public void test_writeFloatF() throws IOException {
        os.writeFloat(9087.456f);
        os.close();
        openDataInputStream();
        float c = dis.readFloat();
        dis.close();
        assertTrue("Incorrect float written", c == 9087.456f);
    }

    /**
     * @tests java.io.DataOutputStream#writeInt(int)
     */
    public void test_writeIntI() throws IOException {
        os.writeInt(9087589);
        os.close();
        openDataInputStream();
        int c = dis.readInt();
        dis.close();
        assertEquals("Incorrect int written", 9087589, c);
    }

    /**
     * @tests java.io.DataOutputStream#writeLong(long)
     */
    public void test_writeLongJ() throws IOException {
        os.writeLong(908755555456L);
        os.close();
        openDataInputStream();
        long c = dis.readLong();
        dis.close();
        assertEquals("Incorrect long written", 908755555456L, c);
    }

    /**
     * @tests java.io.DataOutputStream#writeShort(int)
     */
    public void test_writeShortI() throws IOException {
        os.writeShort((short) 9087);
        os.close();
        openDataInputStream();
        short c = dis.readShort();
        dis.close();
        assertEquals("Incorrect short written", 9087, c);
    }

    /**
     * @tests java.io.DataOutputStream#writeUTF(java.lang.String)
     */
    public void test_writeUTFLjava_lang_String() throws IOException {
        os.writeUTF(unihw);
        os.close();
        openDataInputStream();
        assertTrue("Failed to write string in UTF format",
                dis.available() == unihw.length() + 2);
        assertTrue("Incorrect string returned", dis.readUTF().equals(unihw));
    }

    private void openDataInputStream() throws IOException {
        dis = new DataInputStream(new ByteArrayInputStream(bos.toByteArray()));
    }

    /**
     * Sets up the fixture, for example, open a network connection. This method
     * is called before a test is executed.
     */
    protected void setUp() {
        bos = new ByteArrayOutputStream();
        os = new DataOutputStream(bos);
    }

    /**
     * Tears down the fixture, for example, close a network connection. This
     * method is called after a test is executed.
     */
    protected void tearDown() {
        try {
            if (os != null)
                os.close();
            if (dis != null)
                dis.close();
        } catch (IOException e) {
        }
    }
}