* represents is a printer.
     */
    public static final int TYPE_PRINTER = 0x20;
    /**
     * Returned by {@link #getType()} if the resource this {@code SmbFile}
     * represents is a communications device.
     */
    public static final int TYPE_COMM = 0x40;

    private String canon; // Initially null; set by getUncPath; dir must end with '/'
    private String share; // Can be null

    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")