test/api/test-common.c - third_party/harfbuzz - Git at Google

 /*
  * Copyright © 2011  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
  *
  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  *
  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  *
  * Google Author(s): Behdad Esfahbod
  */

 #include "hb-test.h"

 /* Unit tests for hb-common.h */


 static void
 test_types_int (void)
 {
   g_assert_cmpint (sizeof (int8_t), ==, 1);
   g_assert_cmpint (sizeof (uint8_t), ==, 1);
   g_assert_cmpint (sizeof (int16_t), ==, 2);
   g_assert_cmpint (sizeof (uint16_t), ==, 2);
   g_assert_cmpint (sizeof (int32_t), ==, 4);
   g_assert_cmpint (sizeof (uint32_t), ==, 4);
   g_assert_cmpint (sizeof (int64_t), ==, 8);
   g_assert_cmpint (sizeof (uint64_t), ==, 8);

   g_assert_cmpint (sizeof (hb_codepoint_t), ==, 4);
   g_assert_cmpint (sizeof (hb_position_t), ==, 4);
   g_assert_cmpint (sizeof (hb_mask_t), ==, 4);
   g_assert_cmpint (sizeof (hb_var_int_t), ==, 4);
 }

 static void
 test_types_direction (void)
 {
   g_assert_cmpint ((signed) HB_DIRECTION_INVALID, ==, 0);
   g_assert_cmpint (HB_DIRECTION_LTR, !=, 0);

   g_assert (HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_LTR));
   g_assert (HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_RTL));
   g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_TTB));
   g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_BTT));
   g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_INVALID));

   g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_LTR));
   g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_RTL));
   g_assert (HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_TTB));
   g_assert (HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_BTT));
   g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_INVALID));

   g_assert (HB_DIRECTION_IS_FORWARD (HB_DIRECTION_LTR));
   g_assert (HB_DIRECTION_IS_FORWARD (HB_DIRECTION_TTB));
   g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_RTL));
   g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_BTT));
   g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_INVALID));

   g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_LTR));
   g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_TTB));
   g_assert (HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_RTL));
   g_assert (HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_BTT));
   g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_INVALID));

   g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_LTR));
   g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_TTB));
   g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_RTL));
   g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_BTT));
   g_assert (!HB_DIRECTION_IS_VALID (HB_DIRECTION_INVALID));
   g_assert (!HB_DIRECTION_IS_VALID ((hb_direction_t) 0x12345678));

   g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_LTR), ==, HB_DIRECTION_RTL);
   g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_RTL), ==, HB_DIRECTION_LTR);
   g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_TTB), ==, HB_DIRECTION_BTT);
   g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_BTT), ==, HB_DIRECTION_TTB);
   //g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_INVALID), ==, HB_DIRECTION_INVALID);

   g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string (NULL, -1));
   g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("", -1));
   g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("t", 0));
   g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("x", -1));
   g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("r", -1));
   g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("rtl", -1));
   g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("RtL", -1));
   g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("right-to-left", -1));
   g_assert_cmpint (HB_DIRECTION_TTB, ==, hb_direction_from_string ("ttb", -1));

   g_assert (0 == strcmp ("ltr", hb_direction_to_string (HB_DIRECTION_LTR)));
   g_assert (0 == strcmp ("rtl", hb_direction_to_string (HB_DIRECTION_RTL)));
   g_assert (0 == strcmp ("ttb", hb_direction_to_string (HB_DIRECTION_TTB)));
   g_assert (0 == strcmp ("btt", hb_direction_to_string (HB_DIRECTION_BTT)));
   g_assert (0 == strcmp ("invalid", hb_direction_to_string (HB_DIRECTION_INVALID)));
 }

 static void
 test_types_tag (void)
 {
   g_assert_cmphex (HB_TAG_NONE, ==, 0);

   g_assert_cmphex (HB_TAG ('a','B','c','D'), ==, 0x61426344);

   g_assert_cmphex (hb_tag_from_string ("aBcDe", -1), ==, 0x61426344);
   g_assert_cmphex (hb_tag_from_string ("aBcD", -1),  ==, 0x61426344);
   g_assert_cmphex (hb_tag_from_string ("aBc", -1),   ==, 0x61426320);
   g_assert_cmphex (hb_tag_from_string ("aB", -1),    ==, 0x61422020);
   g_assert_cmphex (hb_tag_from_string ("a", -1),     ==, 0x61202020);
   g_assert_cmphex (hb_tag_from_string ("aBcDe",  1), ==, 0x61202020);
   g_assert_cmphex (hb_tag_from_string ("aBcDe",  2), ==, 0x61422020);
   g_assert_cmphex (hb_tag_from_string ("aBcDe",  3), ==, 0x61426320);
   g_assert_cmphex (hb_tag_from_string ("aBcDe",  4), ==, 0x61426344);
   g_assert_cmphex (hb_tag_from_string ("aBcDe",  4), ==, 0x61426344);

   g_assert_cmphex (hb_tag_from_string ("", -1),      ==, HB_TAG_NONE);
   g_assert_cmphex (hb_tag_from_string ("x", 0),      ==, HB_TAG_NONE);
   g_assert_cmphex (hb_tag_from_string (NULL, -1),    ==, HB_TAG_NONE);
 }

 static void
 test_types_script (void)
 {
   hb_tag_t arab = HB_TAG_CHAR4 ("arab");
   hb_tag_t Arab = HB_TAG_CHAR4 ("Arab");
   hb_tag_t ARAB = HB_TAG_CHAR4 ("ARAB");

   hb_tag_t wWyZ = HB_TAG_CHAR4 ("wWyZ");
   hb_tag_t Wwyz = HB_TAG_CHAR4 ("Wwyz");

   hb_tag_t x123 = HB_TAG_CHAR4 ("x123");

   g_assert_cmpint (HB_SCRIPT_INVALID, ==, (hb_script_t) HB_TAG_NONE);
   g_assert_cmphex (HB_SCRIPT_ARABIC, !=, HB_SCRIPT_LATIN);

   g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string (NULL, -1));
   g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string ("", -1));
   g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string ("x", 0));
   g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_string ("x", -1));

   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("arab", -1));
   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("Arab", -1));
   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("ARAB", -1));
   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("Arabic", 6));
   g_assert_cmphex (HB_SCRIPT_ARABIC, !=, hb_script_from_string ("Arabic", 3));

   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (arab));
   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (Arab));
   g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (ARAB));

   /* Arbitrary tags that look like may be valid ISO 15924 should be preserved. */
   g_assert_cmphex (HB_SCRIPT_UNKNOWN, !=, hb_script_from_string ("wWyZ", -1));
   g_assert_cmphex (HB_SCRIPT_UNKNOWN, !=, hb_script_from_iso15924_tag (wWyZ));
   /* Otherwise, UNKNOWN should be returned. */
   g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_string ("x123", -1));
   g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_iso15924_tag (x123));

   g_assert_cmphex (hb_script_to_iso15924_tag (HB_SCRIPT_ARABIC), ==, Arab);
   g_assert_cmphex (hb_script_to_iso15924_tag (hb_script_from_iso15924_tag (wWyZ)), ==, Wwyz);

   g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_LATIN), ==, HB_DIRECTION_LTR);
   g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_ARABIC), ==, HB_DIRECTION_RTL);
   g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_OLD_ITALIC), ==, HB_DIRECTION_INVALID);
   g_assert_cmpint (hb_script_get_horizontal_direction (hb_script_from_iso15924_tag (wWyZ)), ==, HB_DIRECTION_LTR);
 }

 static void
 test_types_language (void)
 {
   hb_language_t fa = hb_language_from_string ("fa", -1);
   hb_language_t fa_IR = hb_language_from_string ("fa_IR", -1);
   hb_language_t fa_ir = hb_language_from_string ("fa-ir", -1);
   hb_language_t en = hb_language_from_string ("en", -1);

   g_assert (HB_LANGUAGE_INVALID == NULL);

   g_assert (fa != NULL);
   g_assert (fa_IR != NULL);
   g_assert (fa_IR == fa_ir);

   g_assert (en != NULL);
   g_assert (en != fa);

   /* Test recall */
   g_assert (en == hb_language_from_string ("en", -1));
   g_assert (en == hb_language_from_string ("eN", -1));
   g_assert (en == hb_language_from_string ("Enx", 2));

   g_assert (HB_LANGUAGE_INVALID == hb_language_from_string (NULL, -1));
   g_assert (HB_LANGUAGE_INVALID == hb_language_from_string ("", -1));
   g_assert (HB_LANGUAGE_INVALID == hb_language_from_string ("en", 0));
   g_assert (HB_LANGUAGE_INVALID != hb_language_from_string ("en", 1));
   g_assert (NULL == hb_language_to_string (HB_LANGUAGE_INVALID));

   /* Not sure how to test this better.  Setting env vars
    * here doesn't sound like the right approach, and I'm
    * not sure that it even works. */
   g_assert (HB_LANGUAGE_INVALID != hb_language_get_default ());
 }

 int
 main (int argc, char **argv)
 {
   hb_test_init (&argc, &argv);

   hb_test_add (test_types_int);
   hb_test_add (test_types_direction);
   hb_test_add (test_types_tag);
   hb_test_add (test_types_script);
   hb_test_add (test_types_language);

   return hb_test_run();
 }
	/*
	* Copyright © 2011 Google, Inc.
	*
	* This is part of HarfBuzz, a text shaping library.
	*
	* Permission is hereby granted, without written agreement and without
	* license or royalty fees, to use, copy, modify, and distribute this
	* software and its documentation for any purpose, provided that the
	* above copyright notice and the following two paragraphs appear in
	* all copies of this software.
	*
	* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
	* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
	* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
	* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
	* DAMAGE.
	*
	* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
	* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
	* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
	* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
	* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
	*
	* Google Author(s): Behdad Esfahbod
	*/

	#include "hb-test.h"

	/* Unit tests for hb-common.h */


	static void
	test_types_int (void)
	{
	g_assert_cmpint (sizeof (int8_t), ==, 1);
	g_assert_cmpint (sizeof (uint8_t), ==, 1);
	g_assert_cmpint (sizeof (int16_t), ==, 2);
	g_assert_cmpint (sizeof (uint16_t), ==, 2);
	g_assert_cmpint (sizeof (int32_t), ==, 4);
	g_assert_cmpint (sizeof (uint32_t), ==, 4);
	g_assert_cmpint (sizeof (int64_t), ==, 8);
	g_assert_cmpint (sizeof (uint64_t), ==, 8);

	g_assert_cmpint (sizeof (hb_codepoint_t), ==, 4);
	g_assert_cmpint (sizeof (hb_position_t), ==, 4);
	g_assert_cmpint (sizeof (hb_mask_t), ==, 4);
	g_assert_cmpint (sizeof (hb_var_int_t), ==, 4);
	}

	static void
	test_types_direction (void)
	{
	g_assert_cmpint ((signed) HB_DIRECTION_INVALID, ==, 0);
	g_assert_cmpint (HB_DIRECTION_LTR, !=, 0);

	g_assert (HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_LTR));
	g_assert (HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_RTL));
	g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_TTB));
	g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_BTT));
	g_assert (!HB_DIRECTION_IS_HORIZONTAL (HB_DIRECTION_INVALID));

	g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_LTR));
	g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_RTL));
	g_assert (HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_TTB));
	g_assert (HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_BTT));
	g_assert (!HB_DIRECTION_IS_VERTICAL (HB_DIRECTION_INVALID));

	g_assert (HB_DIRECTION_IS_FORWARD (HB_DIRECTION_LTR));
	g_assert (HB_DIRECTION_IS_FORWARD (HB_DIRECTION_TTB));
	g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_RTL));
	g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_BTT));
	g_assert (!HB_DIRECTION_IS_FORWARD (HB_DIRECTION_INVALID));

	g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_LTR));
	g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_TTB));
	g_assert (HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_RTL));
	g_assert (HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_BTT));
	g_assert (!HB_DIRECTION_IS_BACKWARD (HB_DIRECTION_INVALID));

	g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_LTR));
	g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_TTB));
	g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_RTL));
	g_assert (HB_DIRECTION_IS_VALID (HB_DIRECTION_BTT));
	g_assert (!HB_DIRECTION_IS_VALID (HB_DIRECTION_INVALID));
	g_assert (!HB_DIRECTION_IS_VALID ((hb_direction_t) 0x12345678));

	g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_LTR), ==, HB_DIRECTION_RTL);
	g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_RTL), ==, HB_DIRECTION_LTR);
	g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_TTB), ==, HB_DIRECTION_BTT);
	g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_BTT), ==, HB_DIRECTION_TTB);
	//g_assert_cmpint (HB_DIRECTION_REVERSE (HB_DIRECTION_INVALID), ==, HB_DIRECTION_INVALID);

	g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string (NULL, -1));
	g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("", -1));
	g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("t", 0));
	g_assert_cmpint (HB_DIRECTION_INVALID, ==, hb_direction_from_string ("x", -1));
	g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("r", -1));
	g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("rtl", -1));
	g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("RtL", -1));
	g_assert_cmpint (HB_DIRECTION_RTL, ==, hb_direction_from_string ("right-to-left", -1));
	g_assert_cmpint (HB_DIRECTION_TTB, ==, hb_direction_from_string ("ttb", -1));

	g_assert (0 == strcmp ("ltr", hb_direction_to_string (HB_DIRECTION_LTR)));
	g_assert (0 == strcmp ("rtl", hb_direction_to_string (HB_DIRECTION_RTL)));
	g_assert (0 == strcmp ("ttb", hb_direction_to_string (HB_DIRECTION_TTB)));
	g_assert (0 == strcmp ("btt", hb_direction_to_string (HB_DIRECTION_BTT)));
	g_assert (0 == strcmp ("invalid", hb_direction_to_string (HB_DIRECTION_INVALID)));
	}

	static void
	test_types_tag (void)
	{
	g_assert_cmphex (HB_TAG_NONE, ==, 0);

	g_assert_cmphex (HB_TAG ('a','B','c','D'), ==, 0x61426344);

	g_assert_cmphex (hb_tag_from_string ("aBcDe", -1), ==, 0x61426344);
	g_assert_cmphex (hb_tag_from_string ("aBcD", -1), ==, 0x61426344);
	g_assert_cmphex (hb_tag_from_string ("aBc", -1), ==, 0x61426320);
	g_assert_cmphex (hb_tag_from_string ("aB", -1), ==, 0x61422020);
	g_assert_cmphex (hb_tag_from_string ("a", -1), ==, 0x61202020);
	g_assert_cmphex (hb_tag_from_string ("aBcDe", 1), ==, 0x61202020);
	g_assert_cmphex (hb_tag_from_string ("aBcDe", 2), ==, 0x61422020);
	g_assert_cmphex (hb_tag_from_string ("aBcDe", 3), ==, 0x61426320);
	g_assert_cmphex (hb_tag_from_string ("aBcDe", 4), ==, 0x61426344);
	g_assert_cmphex (hb_tag_from_string ("aBcDe", 4), ==, 0x61426344);

	g_assert_cmphex (hb_tag_from_string ("", -1), ==, HB_TAG_NONE);
	g_assert_cmphex (hb_tag_from_string ("x", 0), ==, HB_TAG_NONE);
	g_assert_cmphex (hb_tag_from_string (NULL, -1), ==, HB_TAG_NONE);
	}

	static void
	test_types_script (void)
	{
	hb_tag_t arab = HB_TAG_CHAR4 ("arab");
	hb_tag_t Arab = HB_TAG_CHAR4 ("Arab");
	hb_tag_t ARAB = HB_TAG_CHAR4 ("ARAB");

	hb_tag_t wWyZ = HB_TAG_CHAR4 ("wWyZ");
	hb_tag_t Wwyz = HB_TAG_CHAR4 ("Wwyz");

	hb_tag_t x123 = HB_TAG_CHAR4 ("x123");

	g_assert_cmpint (HB_SCRIPT_INVALID, ==, (hb_script_t) HB_TAG_NONE);
	g_assert_cmphex (HB_SCRIPT_ARABIC, !=, HB_SCRIPT_LATIN);

	g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string (NULL, -1));
	g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string ("", -1));
	g_assert_cmphex (HB_SCRIPT_INVALID, ==, hb_script_from_string ("x", 0));
	g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_string ("x", -1));

	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("arab", -1));
	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("Arab", -1));
	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("ARAB", -1));
	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_string ("Arabic", 6));
	g_assert_cmphex (HB_SCRIPT_ARABIC, !=, hb_script_from_string ("Arabic", 3));

	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (arab));
	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (Arab));
	g_assert_cmphex (HB_SCRIPT_ARABIC, ==, hb_script_from_iso15924_tag (ARAB));

	/* Arbitrary tags that look like may be valid ISO 15924 should be preserved. */
	g_assert_cmphex (HB_SCRIPT_UNKNOWN, !=, hb_script_from_string ("wWyZ", -1));
	g_assert_cmphex (HB_SCRIPT_UNKNOWN, !=, hb_script_from_iso15924_tag (wWyZ));
	/* Otherwise, UNKNOWN should be returned. */
	g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_string ("x123", -1));
	g_assert_cmphex (HB_SCRIPT_UNKNOWN, ==, hb_script_from_iso15924_tag (x123));

	g_assert_cmphex (hb_script_to_iso15924_tag (HB_SCRIPT_ARABIC), ==, Arab);
	g_assert_cmphex (hb_script_to_iso15924_tag (hb_script_from_iso15924_tag (wWyZ)), ==, Wwyz);

	g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_LATIN), ==, HB_DIRECTION_LTR);
	g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_ARABIC), ==, HB_DIRECTION_RTL);
	g_assert_cmpint (hb_script_get_horizontal_direction (HB_SCRIPT_OLD_ITALIC), ==, HB_DIRECTION_INVALID);
	g_assert_cmpint (hb_script_get_horizontal_direction (hb_script_from_iso15924_tag (wWyZ)), ==, HB_DIRECTION_LTR);
	}

	static void
	test_types_language (void)
	{
	hb_language_t fa = hb_language_from_string ("fa", -1);
	hb_language_t fa_IR = hb_language_from_string ("fa_IR", -1);
	hb_language_t fa_ir = hb_language_from_string ("fa-ir", -1);
	hb_language_t en = hb_language_from_string ("en", -1);

	g_assert (HB_LANGUAGE_INVALID == NULL);

	g_assert (fa != NULL);
	g_assert (fa_IR != NULL);
	g_assert (fa_IR == fa_ir);

	g_assert (en != NULL);
	g_assert (en != fa);

	/* Test recall */
	g_assert (en == hb_language_from_string ("en", -1));
	g_assert (en == hb_language_from_string ("eN", -1));
	g_assert (en == hb_language_from_string ("Enx", 2));

	g_assert (HB_LANGUAGE_INVALID == hb_language_from_string (NULL, -1));
	g_assert (HB_LANGUAGE_INVALID == hb_language_from_string ("", -1));
	g_assert (HB_LANGUAGE_INVALID == hb_language_from_string ("en", 0));
	g_assert (HB_LANGUAGE_INVALID != hb_language_from_string ("en", 1));
	g_assert (NULL == hb_language_to_string (HB_LANGUAGE_INVALID));

	/* Not sure how to test this better. Setting env vars
	* here doesn't sound like the right approach, and I'm
	* not sure that it even works. */
	g_assert (HB_LANGUAGE_INVALID != hb_language_get_default ());
	}

	int
	main (int argc, char **argv)
	{
	hb_test_init (&argc, &argv);

	hb_test_add (test_types_int);
	hb_test_add (test_types_direction);
	hb_test_add (test_types_tag);
	hb_test_add (test_types_script);
	hb_test_add (test_types_language);

	return hb_test_run();
	}