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testReadBytesAndWriteBytesWithFileChannel() — netty Function Reference

Architecture documentation for the testReadBytesAndWriteBytesWithFileChannel() function in AbstractByteBufTest.java from the netty codebase.

Function java Buffer Allocators calls 1

Entity Profile

Dependency Diagram

graph TD
  5a2f4dd3_5572_26e1_fb9c_c53ed557cd0f["testReadBytesAndWriteBytesWithFileChannel()"]
  6540f2d1_cdad_6705_dd1d_9a24e2e53242["AbstractByteBufTest"]
  5a2f4dd3_5572_26e1_fb9c_c53ed557cd0f -->|defined in| 6540f2d1_cdad_6705_dd1d_9a24e2e53242
  3b376070_a080_cb6d_9a78_e8acbbdd5c2c["close()"]
  5a2f4dd3_5572_26e1_fb9c_c53ed557cd0f -->|calls| 3b376070_a080_cb6d_9a78_e8acbbdd5c2c
  style 5a2f4dd3_5572_26e1_fb9c_c53ed557cd0f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/test/java/io/netty/buffer/AbstractByteBufTest.java lines 5812–5853

    @Test
    public void testReadBytesAndWriteBytesWithFileChannel() throws IOException {
        File file = PlatformDependent.createTempFile("file-channel", ".tmp", null);
        RandomAccessFile randomAccessFile = null;
        try {
            randomAccessFile = new RandomAccessFile(file, "rw");
            FileChannel channel = randomAccessFile.getChannel();
            // channelPosition should never be changed
            long channelPosition = channel.position();

            byte[] bytes = {'a', 'b', 'c', 'd'};
            int len = bytes.length;
            ByteBuf buffer = newBuffer(len);
            buffer.resetReaderIndex();
            buffer.resetWriterIndex();
            buffer.writeBytes(bytes);

            int oldReaderIndex = buffer.readerIndex();
            assertEquals(len, buffer.readBytes(channel, 10, len));
            assertEquals(oldReaderIndex + len, buffer.readerIndex());
            assertEquals(channelPosition, channel.position());

            ByteBuf buffer2 = newBuffer(len);
            buffer2.resetReaderIndex();
            buffer2.resetWriterIndex();
            int oldWriterIndex = buffer2.writerIndex();
            assertEquals(len, buffer2.writeBytes(channel, 10, len));
            assertEquals(channelPosition, channel.position());
            assertEquals(oldWriterIndex + len, buffer2.writerIndex());
            assertEquals('a', buffer2.getByte(0));
            assertEquals('b', buffer2.getByte(1));
            assertEquals('c', buffer2.getByte(2));
            assertEquals('d', buffer2.getByte(3));
            buffer.release();
            buffer2.release();
        } finally {
            if (randomAccessFile != null) {
                randomAccessFile.close();
            }
            file.delete();
        }
    }

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Frequently Asked Questions

What does testReadBytesAndWriteBytesWithFileChannel() do?
testReadBytesAndWriteBytesWithFileChannel() is a function in the netty codebase, defined in buffer/src/test/java/io/netty/buffer/AbstractByteBufTest.java.
Where is testReadBytesAndWriteBytesWithFileChannel() defined?
testReadBytesAndWriteBytesWithFileChannel() is defined in buffer/src/test/java/io/netty/buffer/AbstractByteBufTest.java at line 5812.
What does testReadBytesAndWriteBytesWithFileChannel() call?
testReadBytesAndWriteBytesWithFileChannel() calls 1 function(s): close.

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