File asciiFile = getTestFile("ascii.txt");
    ByteSource byteSource = Files.asByteSource(asciiFile);
    assertSame(byteSource, byteSource.asCharSource(UTF_8).asByteSource(UTF_8));
  }

  public void testToByteArray() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");
    assertThat(Files.toByteArray(asciiFile)).isEqualTo(ASCII.getBytes(US_ASCII));

    Arrays.fill(arrays, sharedArray);

    try {
      Ints.concat(arrays);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testToByteArray() {
    assertThat(Ints.toByteArray(0x12131415)).isEqualTo(new byte[] {0x12, 0x13, 0x14, 0x15});
    assertThat(Ints.toByteArray(0xFFEEDDCC))
        .isEqualTo(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC});

    File asciiFile = getTestFile("ascii.txt");
    ByteSource byteSource = Files.asByteSource(asciiFile);
    assertSame(byteSource, byteSource.asCharSource(UTF_8).asByteSource(UTF_8));
  }

  public void testToByteArray() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");
    assertThat(Files.toByteArray(asciiFile)).isEqualTo(ASCII.getBytes(US_ASCII));

    try {
      Shorts.concat(arrays);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  @GwtIncompatible // Shorts.toByteArray
  public void testToByteArray() {
    assertThat(Shorts.toByteArray((short) 0x2345)).isEqualTo(new byte[] {0x23, 0x45});
    assertThat(Shorts.toByteArray((short) 0xFEDC)).isEqualTo(new byte[] {(byte) 0xFE, (byte) 0xDC});
  }