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[test] Add test for cluster merging 

Based on test from https://code.google.com/p/chromium/issues/detail?id=497578

Currently fails.  Basically, if there's a default_ignorable at the
start of text, and font has no space glyph, we remove the default_ignorable,
and that makes the first char in text to correspond to no cluster.

Fix coming.
This commit is contained in:
Behdad Esfahbod 2015-06-18 17:15:33 -07:00
parent a6446d44e6
commit b3a2f6afba
1 changed files with 43 additions and 0 deletions
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43
test/api/test-shape.c
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@ -138,6 +138,48 @@ test_shape (void)
hb_font_destroy (font);
}
static void
test_shape_clusters (void)
{
hb_face_t *face;
hb_font_t *font;
hb_buffer_t *buffer;
unsigned int len;
hb_glyph_info_t *glyphs;
face = hb_face_create (NULL, 0);
font = hb_font_create (face);
hb_face_destroy (face);
buffer = hb_buffer_create ();
hb_buffer_set_direction (buffer, HB_DIRECTION_LTR);
{
/* https://code.google.com/p/chromium/issues/detail?id=497578 */
hb_codepoint_t test[] = {0xFFF1, 0xF0B6};
hb_buffer_add_utf32 (buffer, test, 2, 0, 2);
}
hb_shape (font, buffer, NULL, 0);
len = hb_buffer_get_length (buffer);
glyphs = hb_buffer_get_glyph_infos (buffer, NULL);
{
const hb_codepoint_t output_glyphs[] = {0};
const hb_position_t output_clusters[] = {0};
unsigned int i;
g_assert_cmpint (len, ==, 1);
for (i = 0; i < len; i++) {
g_assert_cmphex (glyphs[i].codepoint, ==, output_glyphs[i]);
g_assert_cmphex (glyphs[i].cluster, ==, output_clusters[i]);
}
}
hb_buffer_destroy (buffer);
hb_font_destroy (font);
}
static void
test_shape_list (void)
{
@ -157,6 +199,7 @@ main (int argc, char **argv)
hb_test_init (&argc, &argv);
hb_test_add (test_shape);
hb_test_add (test_shape_clusters);
/* TODO test fallback shaper */
/* TODO test shaper_full */
hb_test_add (test_shape_list);