Examples of java.util.zip.DeflaterInputStream.skip()

java.util.zip.DeflaterInputStream.skip()
Skips over and discards data from the input stream. This method may block until the specified number of bytes are read and skipped. Note: While {@code n} is given as a {@code long}, the maximum number of bytes which can be skipped is {@code Integer.MAX_VALUE}. @param n number of bytes to be skipped @return the actual number of bytes skipped @throws IOException if an I/O error occurs or if this stream isalready closed

     */
    public void testSkip() throws IOException {
        byte[] buf = new byte[1024];
        DeflaterInputStream dis = new DeflaterInputStream(is);
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(1, dis.available());
        assertEquals(22, dis.read(buf, 0, 1024));
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(0, dis.available());

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        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(1, dis.available());
        assertEquals(22, dis.read(buf, 0, 1024));
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(0, dis.available());
        is = new ByteArrayInputStream(testStr.getBytes("UTF-8"));
        dis = new DeflaterInputStream(is);
        assertEquals(1, dis.available());
        dis.skip(56);

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        dis.skip(1);
        assertEquals(0, dis.available());
        is = new ByteArrayInputStream(testStr.getBytes("UTF-8"));
        dis = new DeflaterInputStream(is);
        assertEquals(1, dis.available());
        dis.skip(56);
        assertEquals(0, dis.available());
        assertEquals(-1, dis.read(buf, 0, 1024));
        try {
            dis.skip(-1);
            fail("should throw IllegalArgumentException");

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        assertEquals(1, dis.available());
        dis.skip(56);
        assertEquals(0, dis.available());
        assertEquals(-1, dis.read(buf, 0, 1024));
        try {
            dis.skip(-1);
            fail("should throw IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            // expected
        }
        assertEquals(0, dis.available());

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        } catch (IllegalArgumentException e) {
            // expected
        }
        assertEquals(0, dis.available());
        // can still skip
        dis.skip(1);
        dis.close();
        try {
            dis.skip(1);
            fail("should throw IOException");
        } catch (IOException e) {

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        assertEquals(0, dis.available());
        // can still skip
        dis.skip(1);
        dis.close();
        try {
            dis.skip(1);
            fail("should throw IOException");
        } catch (IOException e) {
            // expected
        }
        try {

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            fail("should throw IOException");
        } catch (IOException e) {
            // expected
        }
        try {
            dis.skip(-1);
            fail("should throw IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            // expected
        }

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            // expected
        }


        is = new ByteArrayInputStream(testStr.getBytes("UTF-8"));
        dis = new DeflaterInputStream(is);
        assertEquals(23, dis.skip(Long.MAX_VALUE));
        assertEquals(0, dis.available());
    }


    /**
     * @tests DeflaterInputStream#DeflaterInputStream(InputStream)

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     */
    public void testSkip() throws IOException {
        byte[] buf = new byte[1024];
        DeflaterInputStream dis = new DeflaterInputStream(is);
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(1, dis.available());
        assertEquals(22, dis.read(buf, 0, 1024));
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(0, dis.available());

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        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(1, dis.available());
        assertEquals(22, dis.read(buf, 0, 1024));
        assertEquals(1, dis.available());
        dis.skip(1);
        assertEquals(0, dis.available());
        is = new ByteArrayInputStream(testStr.getBytes("UTF-8"));
        dis = new DeflaterInputStream(is);
        assertEquals(1, dis.available());
        dis.skip(56);

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