Examples of com.esotericsoftware.kryo.io.Output

com.esotericsoftware.kryo.io.Output
An OutputStream that buffers data in a byte array and optionally flushes to another OutputStream. Utility methods are provided for efficiently writing primitive types and strings. Encoding of integers: BIG_ENDIAN is used for storing fixed native size integer values LITTLE_ENDIAN is used for a variable length encoding of integer values @author Nathan Sweet


/** @author Nathan Sweet <misc@n4te.com> */
public class InputOutputTest extends KryoTestCase {
  public void testOutputStream () throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    Output output = new Output(buffer, 2);
    output.writeBytes(new byte[] {11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26});
    output.writeBytes(new byte[] {31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46});
    output.writeBytes(new byte[] {51, 52, 53, 54, 55, 56, 57, 58});
    output.writeBytes(new byte[] {61, 62, 63, 64, 65});
    output.flush();


    assertEquals(new byte[] { //
      11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, //
        31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, //
        51, 52, 53, 54, 55, 56, 57, 58, //

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    System.arraycopy(temp, 512, temp2, 0, count);
    assertEquals(bytes, temp2);
  }


  public void testWriteBytes () throws IOException {
    Output buffer = new Output(512);
    buffer.writeBytes(new byte[] {11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26});
    buffer.writeBytes(new byte[] {31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46});
    buffer.writeByte(51);
    buffer.writeBytes(new byte[] {52, 53, 54, 55, 56, 57, 58});
    buffer.writeByte(61);
    buffer.writeByte(62);
    buffer.writeByte(63);
    buffer.writeByte(64);
    buffer.writeByte(65);
    buffer.flush();


    assertEquals(new byte[] { //
      11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, //
        31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, //
        51, 52, 53, 54, 55, 56, 57, 58, //
        61, 62, 63, 64, 65}, buffer.toBytes());
  }

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        51, 52, 53, 54, 55, 56, 57, 58, //
        61, 62, 63, 64, 65}, buffer.toBytes());
  }


  public void testStrings () throws IOException {
    runStringTest(new Output(4096));
    runStringTest(new Output(897));
    runStringTest(new Output(new ByteArrayOutputStream()));


    Output write = new Output(21);
    String value = "abcdef\u00E1\u00E9\u00ED\u00F3\u00FA\u1234";
    write.writeString(value);
    Input read = new Input(write.toBytes());
    assertEquals(value, read.readString());


    runStringTest(127);
    runStringTest(256);
    runStringTest(1024 * 1023);

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    runStringTest(1024 * 1026);
    runStringTest(1024 * 1024 * 2);
  }


  public void runStringTest (int length) throws IOException {
    Output write = new Output(1024, -1);
    StringBuilder buffer = new StringBuilder();
    for (int i = 0; i < length; i++)
      buffer.append((char)i);


    String value = buffer.toString();
    write.writeString(value);
    write.writeString(value);
    Input read = new Input(write.toBytes());
    assertEquals(value, read.readString());
    assertEquals(value, read.readStringBuilder().toString());


    write.clear();
    write.writeString(buffer);
    write.writeString(buffer);
    read = new Input(write.toBytes());
    assertEquals(value, read.readStringBuilder().toString());
    assertEquals(value, read.readString());


    if (length <= 127) {
      write.clear();
      write.writeAscii(value);
      write.writeAscii(value);
      read = new Input(write.toBytes());
      assertEquals(value, read.readStringBuilder().toString());
      assertEquals(value, read.readString());
    }
  }

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    for (int i = 0; i < 127; i++)
      assertEquals(String.valueOf((char)i) + "abc", read.readStringBuilder().toString());
  }


  public void testCanReadInt () throws IOException {
    Output write = new Output(new ByteArrayOutputStream());


    Input read = new Input(write.toBytes());
    assertEquals(false, read.canReadInt());


    write.writeInt(400, true);


    read = new Input(write.toBytes());
    assertEquals(true, read.canReadInt());
    read.setLimit(read.limit() - 1);
    assertEquals(false, read.canReadInt());
  }

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    read.setLimit(read.limit() - 1);
    assertEquals(false, read.canReadInt());
  }


  public void testInts () throws IOException {
    runIntTest(new Output(4096));
    runIntTest(new Output(new ByteArrayOutputStream()));
  }

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      assertEquals(value, read.readInt(false));
    }
  }


  public void testLongs () throws IOException {
    runLongTest(new Output(4096));
    runLongTest(new Output(new ByteArrayOutputStream()));
  }

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      assertEquals(value, read.readLong(false));
    }
  }


  public void testShorts () throws IOException {
    runShortTest(new Output(4096));
    runShortTest(new Output(new ByteArrayOutputStream()));
  }

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    assertEquals(-16384, read.readShort());
    assertEquals(-32768, read.readShort());
  }


  public void testFloats () throws IOException {
    runFloatTest(new Output(4096));
    runFloatTest(new Output(new ByteArrayOutputStream()));
  }

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    assertEquals(read.readFloat(1000, false), -8192f);
    assertEquals(read.readFloat(1000, true), -8192f);
  }


  public void testDoubles () throws IOException {
    runDoubleTest(new Output(4096));
    runDoubleTest(new Output(new ByteArrayOutputStream()));
  }

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