Examples of io.netty.buffer.ByteBuf.slice()

io.netty.buffer.ByteBuf.slice()
Returns a slice of this buffer's readable bytes. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method is identical to {@code buf.slice(buf.readerIndex(), buf.readableBytes())}. This method does not modify {@code readerIndex} or {@code writerIndex} ofthis buffer.

    public void frameShouldSplit() throws Http2Exception {
        controller.initialOutboundWindowSize(5);


        final ByteBuf data = dummyData(5, 5);
        try {
            send(STREAM_A, data.slice(0, 5), 5);


            // Verify that a partial frame of 5 was sent.
            ArgumentCaptor<ByteBuf> argument = ArgumentCaptor.forClass(ByteBuf.class);
            // None of the padding should be sent in the frame.
            captureWrite(STREAM_A, argument, 0, false);

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    public void frameShouldSplitPadding() throws Http2Exception {
        controller.initialOutboundWindowSize(5);


        final ByteBuf data = dummyData(3, 7);
        try {
            send(STREAM_A, data.slice(0, 3), 7);


            // Verify that a partial frame of 5 was sent.
            ArgumentCaptor<ByteBuf> argument = ArgumentCaptor.forClass(ByteBuf.class);
            captureWrite(STREAM_A, argument, 2, false);
            final ByteBuf writtenBuf = argument.getValue();

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    public void emptyFrameShouldSplitPadding() throws Http2Exception {
        controller.initialOutboundWindowSize(5);


        final ByteBuf data = dummyData(0, 10);
        try {
            send(STREAM_A, data.slice(0, 0), 10);


            // Verify that a partial frame of 5 was sent.
            ArgumentCaptor<ByteBuf> argument = ArgumentCaptor.forClass(ByteBuf.class);
            captureWrite(STREAM_A, argument, 5, false);
            final ByteBuf writtenBuf = argument.getValue();

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    public void windowUpdateShouldSendFrame() throws Http2Exception {
        controller.initialOutboundWindowSize(10);


        final ByteBuf data = dummyData(10, 10);
        try {
            send(STREAM_A, data.slice(0, 10), 10);
            verifyWrite(STREAM_A, data.slice(0, 10), 0);


            // Update the window and verify that the rest of the frame is written.
            controller.updateOutboundWindowSize(STREAM_A, 10);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 10);

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        controller.initialOutboundWindowSize(10);


        final ByteBuf data = dummyData(10, 10);
        try {
            send(STREAM_A, data.slice(0, 10), 10);
            verifyWrite(STREAM_A, data.slice(0, 10), 0);


            // Update the window and verify that the rest of the frame is written.
            controller.updateOutboundWindowSize(STREAM_A, 10);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 10);
            assertEquals(DEFAULT_WINDOW_SIZE - data.readableBytes(), window(CONNECTION_STREAM_ID));

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    public void initialWindowUpdateShouldSendFrame() throws Http2Exception {
        controller.initialOutboundWindowSize(0);


        final ByteBuf data = dummyData(10, 0);
        try {
            send(STREAM_A, data.slice(), 0);
            verifyNoWrite(STREAM_A);


            // Verify that the entire frame was sent.
            controller.initialOutboundWindowSize(10);
            ArgumentCaptor<ByteBuf> argument = ArgumentCaptor.forClass(ByteBuf.class);

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            controller.initialOutboundWindowSize(initWindow - secondWindowSize);
            assertEquals(-secondWindowSize, streamA.outboundFlow().window());


            // Queue up a write. It should not be written now because the window is negative
            resetFrameWriter();
            send(STREAM_A, data2.slice(), 0);
            verifyNoWrite(STREAM_A);


            // Open the window size back up a bit (no send should happen)
            controller.updateOutboundWindowSize(STREAM_A, 5);
            assertEquals(-5, streamA.outboundFlow().window());

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        controller.initialOutboundWindowSize(0);


        // First send a frame that will get buffered.
        final ByteBuf data = dummyData(10, 0);
        try {
            send(STREAM_A, data.slice(), 0);
            verifyNoWrite(STREAM_A);


            // Now send an empty frame on the same stream and verify that it's also buffered.
            send(STREAM_A, Unpooled.EMPTY_BUFFER, 0);
            verifyNoWrite(STREAM_A);

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            verifyNoWrite(STREAM_A);


            // Re-expand the window and verify that both frames were sent.
            controller.initialOutboundWindowSize(10);


            verifyWrite(STREAM_A, data.slice(), 0);
            verifyWrite(STREAM_A, Unpooled.EMPTY_BUFFER, 0);
        } finally {
            manualSafeRelease(data);
        }
    }

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        // Set the connection window size to zero.
        exhaustStreamWindow(CONNECTION_STREAM_ID);


        final ByteBuf data = dummyData(10, 0);
        try {
            send(STREAM_A, data.slice(), 0);
            verifyNoWrite(STREAM_A);


            // Verify that the entire frame was sent.
            controller.updateOutboundWindowSize(CONNECTION_STREAM_ID, 10);
            assertEquals(0, window(CONNECTION_STREAM_ID));

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