add gvar & HVAR retain-gids test cases

test/api/test-subset-gvar.c

@@ -68,6 +68,27 @@ test_subset_gvar (void)
   hb_face_destroy (face_ac);
 }
 
+static void
+test_subset_gvar_retaingids (void)
+{
+  hb_face_t *face_abc = hb_test_open_font_file ("fonts/SourceSansVariable-Roman.abc.ttf");
+  hb_face_t *face_ac = hb_test_open_font_file ("fonts/SourceSansVariable-Roman.ac.retaingids.ttf");
+
+  hb_set_t *codepoints = hb_set_create ();
+  hb_face_t *face_abc_subset;
+  hb_set_add (codepoints, 'a');
+  hb_set_add (codepoints, 'c');
+  hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
+  hb_subset_input_set_retain_gids (input, true);
+  face_abc_subset = hb_subset_test_create_subset (face_abc, input);
+  hb_set_destroy (codepoints);
+
+  hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('g','v','a','r'));
+
+  hb_face_destroy (face_abc_subset);
+  hb_face_destroy (face_abc);
+  hb_face_destroy (face_ac);
+}
 
 int
 main (int argc, char **argv)
@@ -76,6 +97,7 @@ main (int argc, char **argv)
 
   hb_test_add (test_subset_gvar_noop);
   hb_test_add (test_subset_gvar);
+  hb_test_add (test_subset_gvar_retaingids);
 
   return hb_test_run ();
 }

test/api/test-subset-hvar.c

@@ -68,6 +68,28 @@ test_subset_HVAR (void)
   hb_face_destroy (face_ac);
 }
 
+static void
+test_subset_HVAR_retaingids (void)
+{
+  hb_face_t *face_abc = hb_test_open_font_file ("fonts/SourceSansVariable-Roman.abc.ttf");
+  hb_face_t *face_ac = hb_test_open_font_file ("fonts/SourceSansVariable-Roman.ac.retaingids.ttf");
+
+  hb_set_t *codepoints = hb_set_create ();
+  hb_face_t *face_abc_subset;
+  hb_set_add (codepoints, 'a');
+  hb_set_add (codepoints, 'c');
+  hb_subset_input_t *input = hb_subset_test_create_input (codepoints);
+  hb_subset_input_set_retain_gids (input, true);
+  face_abc_subset = hb_subset_test_create_subset (face_abc, input);
+  hb_set_destroy (codepoints);
+
+  hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('H','V','A','R'));
+
+  hb_face_destroy (face_abc_subset);
+  hb_face_destroy (face_abc);
+  hb_face_destroy (face_ac);
+}
+
 
 int
 main (int argc, char **argv)
@@ -76,6 +98,7 @@ main (int argc, char **argv)
 
   hb_test_add (test_subset_HVAR_noop);
   hb_test_add (test_subset_HVAR);
+  hb_test_add (test_subset_HVAR_retaingids);
 
   return hb_test_run ();
 }