Examples of org.tmatesoft.hg.internal.Filter.filter()

org.tmatesoft.hg.internal.Filter.filter()
Filters data and returns a new buffer with data or an original buffer. Original buffer may not be fully consumed, #compact() might be operation to perform @param src @return a buffer ready to be read

  @Test
  public void testSmallBuffer() throws Exception {
    initRepo();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    final byte[] in = "1\n2\n3\n".getBytes();
    ByteBuffer bb = kwFilter.filter(ByteBuffer.wrap(in));
    final byte[] out = new byte[bb.remaining()];
    bb.get(out);
    Assert.assertArrayEquals(in, out);
  }

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  @Test
  public void testKeywordDrop() throws Exception {
    initRepo();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    final byte[] in = "1\n$Revision: cf200271439a7ec256151b30bc4360b21db3542e$\n3\n".getBytes();
    ByteBuffer bb = kwFilter.filter(ByteBuffer.wrap(in));
    final byte[] out = new byte[bb.remaining()];
    bb.get(out);
    Assert.assertArrayEquals("1\n$Revision$\n3\n".getBytes(), out);
  }

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    initRepo();
    final byte[] in1 = "1\n$Id:whatever".getBytes();
    final byte[] in2 = " continues here$\n3\n".getBytes();
    ByteArrayChannel out = new ByteArrayChannel();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    out.write(kwFilter.filter(ByteBuffer.wrap(in1)));
    out.write(kwFilter.filter(ByteBuffer.wrap(in2)));
    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
    // Same as above, to extreme - only $ in the first buffer
    final Filter kwFilter2 = createFilter(Filter.Direction.ToRepo);
    out = new ByteArrayChannel();

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    final byte[] in1 = "1\n$Id:whatever".getBytes();
    final byte[] in2 = " continues here$\n3\n".getBytes();
    ByteArrayChannel out = new ByteArrayChannel();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    out.write(kwFilter.filter(ByteBuffer.wrap(in1)));
    out.write(kwFilter.filter(ByteBuffer.wrap(in2)));
    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
    // Same as above, to extreme - only $ in the first buffer
    final Filter kwFilter2 = createFilter(Filter.Direction.ToRepo);
    out = new ByteArrayChannel();
    out.write(kwFilter2.filter(ByteBuffer.wrap("1\n$".getBytes())));

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    out.write(kwFilter.filter(ByteBuffer.wrap(in2)));
    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
    // Same as above, to extreme - only $ in the first buffer
    final Filter kwFilter2 = createFilter(Filter.Direction.ToRepo);
    out = new ByteArrayChannel();
    out.write(kwFilter2.filter(ByteBuffer.wrap("1\n$".getBytes())));
    out.write(kwFilter2.filter(ByteBuffer.wrap("Id:whatever continues here$\n3\n".getBytes())));
    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
  }
  
  /**

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    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
    // Same as above, to extreme - only $ in the first buffer
    final Filter kwFilter2 = createFilter(Filter.Direction.ToRepo);
    out = new ByteArrayChannel();
    out.write(kwFilter2.filter(ByteBuffer.wrap("1\n$".getBytes())));
    out.write(kwFilter2.filter(ByteBuffer.wrap("Id:whatever continues here$\n3\n".getBytes())));
    Assert.assertEquals("1\n$Id$\n3\n", new String(out.toArray()));
  }
  
  /**
   * what if input contains smth similar to keyword but unless the second part of the buffer

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    initRepo();
    final byte[] in1 = "1\n$Id:whatever".getBytes();
    final byte[] in2 = " id doesn't close here\n3\n".getBytes();
    ByteArrayChannel out = new ByteArrayChannel();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    out.write(kwFilter.filter(ByteBuffer.wrap(in1)));
    out.write(kwFilter.filter(ByteBuffer.wrap(in2)));
    byte[] expected = new byte[in1.length + in2.length];
    System.arraycopy(in1, 0, expected, 0, in1.length);
    System.arraycopy(in2, 0, expected, in1.length, in2.length);
    Assert.assertEquals(new String(expected), new String(out.toArray()));

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    final byte[] in1 = "1\n$Id:whatever".getBytes();
    final byte[] in2 = " id doesn't close here\n3\n".getBytes();
    ByteArrayChannel out = new ByteArrayChannel();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    out.write(kwFilter.filter(ByteBuffer.wrap(in1)));
    out.write(kwFilter.filter(ByteBuffer.wrap(in2)));
    byte[] expected = new byte[in1.length + in2.length];
    System.arraycopy(in1, 0, expected, 0, in1.length);
    System.arraycopy(in2, 0, expected, in1.length, in2.length);
    Assert.assertEquals(new String(expected), new String(out.toArray()));
  }

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  @Test
  public void testIncompleteKeywordAtEOF() throws Exception {
    initRepo();
    final byte[] in = "1\n$Id:whatever\n".getBytes();
    final Filter kwFilter = createFilter(Filter.Direction.ToRepo);
    ByteBuffer outBuf = kwFilter.filter(ByteBuffer.wrap(in));
    byte[] out = new byte[outBuf.remaining()];
    outBuf.get(out);
    Assert.assertEquals(new String(in), new String(out));
    //
    // incomplete $kw is stripped of in case of EOF

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    outBuf.get(out);
    Assert.assertEquals(new String(in), new String(out));
    //
    // incomplete $kw is stripped of in case of EOF
    final Filter kwFilter2 = createFilter(Filter.Direction.ToRepo);
    outBuf = kwFilter2.filter(ByteBuffer.wrap("1\n$Id:whatever".getBytes()));
    out = new byte[outBuf.remaining()];
    outBuf.get(out);
    Assert.assertEquals("1\n", new String(out));
  }

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