Examples of java.io.InputStream.skip()

java.io.InputStream.skip()
Skips n number of bytes in this InputStream. Subsequent read()'s will not return these bytes unless reset() is used. This method may perform multiple reads to read n bytes. This default implementation reads n bytes into a temporary buffer. Concrete subclasses should provide their own implementation. @param n the number of bytes to skip. @return the number of bytes actually skipped. @throws IOException If the stream is already closed or another IOException occurs.

     */
   public void testSkip() throws Exception {
        InputStream input = new TestNullInputStream(10, true, false);
        assertEquals("Read 1", 0, input.read());
        assertEquals("Read 2", 1, input.read());
        assertEquals("Skip 1", 5, input.skip(5));
        assertEquals("Read 3", 7, input.read());
        assertEquals("Skip 2", 2, input.skip(5)); // only 2 left to skip
        assertEquals("Skip 3 (EOF)", -1, input.skip(5)); // End of file
        try {
            input.skip(5); //

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        InputStream input = new TestNullInputStream(10, true, false);
        assertEquals("Read 1", 0, input.read());
        assertEquals("Read 2", 1, input.read());
        assertEquals("Skip 1", 5, input.skip(5));
        assertEquals("Read 3", 7, input.read());
        assertEquals("Skip 2", 2, input.skip(5)); // only 2 left to skip
        assertEquals("Skip 3 (EOF)", -1, input.skip(5)); // End of file
        try {
            input.skip(5); //
            fail("Expected IOException for skipping after end of file");
        } catch (IOException e) {

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        assertEquals("Read 1", 0, input.read());
        assertEquals("Read 2", 1, input.read());
        assertEquals("Skip 1", 5, input.skip(5));
        assertEquals("Read 3", 7, input.read());
        assertEquals("Skip 2", 2, input.skip(5)); // only 2 left to skip
        assertEquals("Skip 3 (EOF)", -1, input.skip(5)); // End of file
        try {
            input.skip(5); //
            fail("Expected IOException for skipping after end of file");
        } catch (IOException e) {
            assertEquals("Skip after EOF IOException message",

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        assertEquals("Skip 1", 5, input.skip(5));
        assertEquals("Read 3", 7, input.read());
        assertEquals("Skip 2", 2, input.skip(5)); // only 2 left to skip
        assertEquals("Skip 3 (EOF)", -1, input.skip(5)); // End of file
        try {
            input.skip(5); //
            fail("Expected IOException for skipping after end of file");
        } catch (IOException e) {
            assertEquals("Skip after EOF IOException message",
                    "Skip after end of file",
                    e.getMessage());

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    }


    public void testSkipWithoutBOM() throws Exception {
        byte[] data = new byte[] { 'A', 'B', 'C', 'D' };
        InputStream in = new BOMInputStream(createDataStream(data, false));
        in.skip(2L);
        assertEquals('C', in.read());
    }


    public void testSkipWithBOM() throws Exception {
        byte[] data = new byte[] { 'A', 'B', 'C', 'D' };

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    }


    public void testSkipWithBOM() throws Exception {
        byte[] data = new byte[] { 'A', 'B', 'C', 'D' };
        InputStream in = new BOMInputStream(createDataStream(data, true));
        in.skip(2L);
        assertEquals('C', in.read());
    }


    public void testMarkResetAfterReadWithoutBOM() throws Exception {
        byte[] data = new byte[] { 'A', 'B', 'C', 'D' };

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        assertEquals(result, "1234567890");
    }


    public void testContentLengthInputStreamSkip() throws IOException {
        InputStream in = new ContentLengthInputStream(new ByteArrayInputStream(new byte[20]), 10L);
        assertEquals(10, in.skip(10));
        assertTrue(in.read() == -1);


        in = new ContentLengthInputStream(new ByteArrayInputStream(new byte[20]), 10L);
        in.read();
        assertEquals(9, in.skip(10));

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        assertEquals(10, in.skip(10));
        assertTrue(in.read() == -1);


        in = new ContentLengthInputStream(new ByteArrayInputStream(new byte[20]), 10L);
        in.read();
        assertEquals(9, in.skip(10));
        assertTrue(in.read() == -1);


        in = new ContentLengthInputStream(new ByteArrayInputStream(new byte[20]), 2L);
        in.read();
        in.read();

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        assertTrue(in.read() == -1);


        in = new ContentLengthInputStream(new ByteArrayInputStream(new byte[20]), 2L);
        in.read();
        in.read();
        assertTrue(in.skip(10) <= 0);
        assertTrue(in.read() == -1);
    }


    public void testChunkedConsitance() throws IOException {
        String input = "76126;27823abcd;:q38a-\nkjc\rk%1ad\tkh/asdui\r\njkh+?\\suweb";

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            bytes[i] = (byte) i;
        }
    InputStream in = new BufferedInputStream(
        new ByteArrayInputStream(bytes), 12);
    try {
      in.skip(6);
      in.mark(14);
      in.read(new byte[14], 0, 14);
      in.reset();
      assertTrue("Wrong bytes", in.read() == 6 && in.read() == 7);
    } catch (IOException e) {

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