out.writeLong(0xDEADBEEFCAFEBABEL);
    out.writeUTF("Herby Derby");
    out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
    out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));
  }

  public void testReadFully() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    byte[] b = new byte[data.length];
    in.readFully(b);
    assertEquals(Bytes.asList(data), Bytes.asList(b));

    out.writeLong(0xDEADBEEFCAFEBABEL);
    out.writeUTF("Herby Derby");
    out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
    out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));
  }

  public void testReadFully() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    byte[] b = new byte[data.length];
    in.readFully(b);
    assertEquals(Bytes.asList(data), Bytes.asList(b));

    }
    byte[] actual = out.toByteArray();
    for (int i = 0; i < 500 * chunkSize; i += chunkSize) {
      assertThat(Arrays.copyOfRange(actual, i, i + chunkSize)).isEqualTo(dummyData);
    }
  }

  public void testReadFully() throws IOException {
    byte[] b = new byte[10];

    assertThrows(
        NullPointerException.class, () -> ByteStreams.readFully(newTestStream(10), null, 0, 10));

    }
    byte[] actual = out.toByteArray();
    for (int i = 0; i < 500 * chunkSize; i += chunkSize) {
      assertThat(Arrays.copyOfRange(actual, i, i + chunkSize)).isEqualTo(dummyData);
    }
  }

  public void testReadFully() throws IOException {
    byte[] b = new byte[10];

    assertThrows(
        NullPointerException.class, () -> ByteStreams.readFully(newTestStream(10), null, 0, 10));