* a directory
 */
    public static final int ATTR_DIRECTORY  = 0x10;
/**
 * A file with this bit on as returned by <tt>getAttributes()</tt> or set
 * with <tt>setAttributes()</tt> is an archived file
 */
    public static final int ATTR_ARCHIVE    = 0x20;

    // extended file attribute encoding(others same as above)
    static final int ATTR_COMPRESSED       = 0x800;

    assertFailsWith<IllegalArgumentException> {
      Request.Builder().addHeader("a b", "c")
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected char 0x20 at 1 in header name: a b")
    }
  }

  @Test
  fun requestHeaderNameWithTabForbidden() {
    assertFailsWith<IllegalArgumentException> {
      Request.Builder().addHeader("a\tb", "c")