java/io/ByteArrayInputStreamTest.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 tests.api.java.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;

public class ByteArrayInputStreamTest extends junit.framework.TestCase {

	private java.io.InputStream is;

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

	/**
	 * @tests java.io.ByteArrayInputStream#ByteArrayInputStream(byte[])
	 */
	public void test_Constructor$B() {
		// Test for method java.io.ByteArrayInputStream(byte [])

		java.io.InputStream bis = new java.io.ByteArrayInputStream(fileString
				.getBytes());

		try {
			assertTrue("Unable to create ByteArrayInputStream",
					bis.available() == fileString.length());
		} catch (Exception e) {
			System.out.println("Exception during Constructor test");
		}
	}

	/**
	 * @throws IOException
	 * @tests java.io.ByteArrayInputStream#ByteArrayInputStream(byte[], int,
	 *        int)
	 */
	public void test_Constructor$BII() throws IOException {
		// Test for method java.io.ByteArrayInputStream(byte [], int, int)

		byte[] zz = fileString.getBytes();
		java.io.InputStream bis = new java.io.ByteArrayInputStream(zz, 0, 100);

		try {
			assertEquals("Unable to create ByteArrayInputStream",
					100, bis.available());
		} catch (Exception e) {
			fail("Exception during Constructor test");
		}

		// Regression test for Harmony-2405
		new SubByteArrayInputStream(new byte[] { 1, 2 }, 444, 13);
		assertEquals(444, SubByteArrayInputStream.pos);
		assertEquals(444, SubByteArrayInputStream.mark);
		assertEquals(2, SubByteArrayInputStream.count);
	}

	static class SubByteArrayInputStream extends ByteArrayInputStream {
		public static byte[] buf;

		public static int mark, pos, count;

		SubByteArrayInputStream(byte[] buf, int offset, int length)
				throws IOException {
			super(buf, offset, length);
			buf = super.buf;
			mark = super.mark;
			pos = super.pos;
			count = super.count;
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#available()
	 */
	public void test_available() {
		// Test for method int java.io.ByteArrayInputStream.available()
		try {
			assertTrue("Returned incorrect number of available bytes", is
					.available() == fileString.length());
		} catch (Exception e) {
			fail("Exception during available test");
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#close()
	 */
	public void test_close() {
		// Test for method void java.io.ByteArrayInputStream.close()
		try {
			is.read();
		} catch (java.io.IOException e) {
			fail("Failed reading from input stream");
		}
		try {
			is.close();
		} catch (java.io.IOException e) {
			fail("Failed closing input stream");
		}
		try {
			is.read();
		} catch (Exception e) {
			fail("Should be able to read from closed stream");
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#mark(int)
	 */
	public void test_markI() {
		// Test for method void java.io.ByteArrayInputStream.mark(int)
		byte[] buf1 = new byte[100];
		byte[] buf2 = new byte[100];
		try {
			is.skip(3000);
			is.mark(1000);
			is.read(buf1, 0, buf1.length);
			is.reset();
			is.read(buf2, 0, buf2.length);
			is.reset();
			assertTrue("Failed to mark correct position", new String(buf1, 0,
					buf1.length).equals(new String(buf2, 0, buf2.length)));

		} catch (Exception e) {
			fail("Exception during mark test");
		}

	}

	/**
	 * @tests java.io.ByteArrayInputStream#markSupported()
	 */
	public void test_markSupported() {
		// Test for method boolean java.io.ByteArrayInputStream.markSupported()
		assertTrue("markSupported returned incorrect value", is.markSupported());
	}

	/**
	 * @tests java.io.ByteArrayInputStream#read()
	 */
	public void test_read() {
		// Test for method int java.io.ByteArrayInputStream.read()
		try {

			int c = is.read();
			is.reset();
			assertTrue("read returned incorrect char", c == fileString
					.charAt(0));
		} catch (Exception e) {
			fail("Exception during read test");
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#read(byte[], int, int)
	 */
	public void test_read$BII() {
		// Test for method int java.io.ByteArrayInputStream.read(byte [], int,
		// int)
		byte[] buf1 = new byte[20];
		try {
			is.skip(50);
			is.mark(100);
			is.read(buf1, 0, buf1.length);
			assertTrue("Failed to read correct data", new String(buf1, 0,
					buf1.length).equals(fileString.substring(50, 70)));

		} catch (Exception e) {
			fail("Exception during read test: " + e);
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#reset()
	 */
	public void test_reset() {
		// Test for method void java.io.ByteArrayInputStream.reset()
		byte[] buf1 = new byte[10];
		byte[] buf2 = new byte[10];
		try {
			is.mark(200);
			is.read(buf1, 0, 10);
			is.reset();
			is.read(buf2, 0, 10);
			is.reset();
			assertTrue("Reset failed", new String(buf1, 0, buf1.length)
					.equals(new String(buf2, 0, buf2.length)));
		} catch (Exception e) {
			fail("Exception during reset test : " + e.getMessage());
		}
	}

	/**
	 * @tests java.io.ByteArrayInputStream#skip(long)
	 */
	public void test_skipJ() {
		// Test for method long java.io.ByteArrayInputStream.skip(long)
		byte[] buf1 = new byte[10];
		try {
			is.skip(100);
			is.read(buf1, 0, buf1.length);
			assertTrue("Failed to skip to correct position", new String(buf1,
					0, buf1.length).equals(fileString.substring(100, 110)));
		} catch (Exception e) {
			fail("Exception during skip test : " + e.getMessage());
		}
	}

	/**
	 * Sets up the fixture, for example, open a network connection. This method
	 * is called before a test is executed.
	 */
	protected void setUp() {

		is = new java.io.ByteArrayInputStream(fileString.getBytes());

	}

	/**
	 * Tears down the fixture, for example, close a network connection. This
	 * method is called after a test is executed.
	 */
	protected void tearDown() {

		try {
			is.close();

		} catch (Exception e) {
		}
	}
}