[test] Test hb_ot_color_has_{colr,cpal}_data

src/dump-emoji.cc

 /*
  * Copyright © 2018  Ebrahim Byagowi
+ * Copyright © 2018  Khaled Hosny
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -140,7 +141,7 @@ colr_cpal_rendering (hb_face_t *face, cairo_font_face_t *cairo_face)
 	hb_ot_color_get_palette_colors (face, palette, 0, &num_colors, colors);
 	if (num_colors)
 	{
-	  // If we have more than one palette, use a better namin
+	  // If we have more than one palette, use a simpler naming
 	  if (palette_count == 1)
 	    sprintf (output_path, "out/colr-%d.svg", gid);
 	  else

src/hb-ot-color.cc

@@ -117,7 +117,7 @@ hb_ot_color_get_palette_name_id (hb_face_t *face, unsigned int palette)
 }
 
 /**
- * hb_ot_color_get_palette_count:
+ * hb_ot_color_get_palette_entry_count:
  * @face: a font face.
  *
  * Returns: Number of entries on each palette
@@ -206,7 +206,8 @@ hb_ot_color_get_palette_colors (hb_face_t      *face,
  * @gid:
  * @start_offset:
  * @count:  (inout) (optional):
- * @color_indices: (array length=color_count) (optional):
+ * @gids: (array length=count) (optional):
+ * @color_indices: (array length=count) (optional):
  *
  * Returns:
  *
@@ -250,7 +251,7 @@ hb_ot_color_get_color_layers (hb_face_t        *face,
  * or if @palette is not between 0 and hb_ot_color_get_palette_count(),
  * the result is #HB_OT_COLOR_PALETTE_FLAG_DEFAULT.
  *
- * Since: DONTREPLACEME
+ * Since: REPLACEME
  */
 hb_ot_color_palette_flags_t
 hb_ot_color_get_palette_flags (hb_face_t *face, unsigned int palette)

test/api/test-ot-color.c

 /*
  * Copyright © 2016  Google, Inc.
+ * Copyright © 2018  Ebrahim Byagowi
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -321,6 +322,13 @@ test_hb_ot_color_get_color_layers (void)
   unsigned int color_indices[1];
   unsigned int count = 1;
 
+  g_assert_cmpuint (hb_ot_color_get_color_layers (cpal_v1, 0, 0,
+						  NULL, NULL, NULL), ==, 0);
+  g_assert_cmpuint (hb_ot_color_get_color_layers (cpal_v1, 1, 0,
+						  NULL, NULL, NULL), ==, 0);
+  g_assert_cmpuint (hb_ot_color_get_color_layers (cpal_v1, 2, 0,
+						  NULL, NULL, NULL), ==, 2);
+
   unsigned int num_layers;
   num_layers = hb_ot_color_get_color_layers (cpal_v1, 2, 0, &count, layer_gids,
 					     color_indices);
@@ -340,6 +348,20 @@ test_hb_ot_color_get_color_layers (void)
   g_assert_cmpuint (color_indices[0], ==, 0);
 }
 
+static void
+test_hb_ot_color_has_data (void)
+{
+  hb_face_t *empty = hb_face_get_empty ();
+
+  g_assert (hb_ot_color_has_colr_data (empty) == FALSE);
+  g_assert (hb_ot_color_has_colr_data (cpal_v0) == TRUE);
+  g_assert (hb_ot_color_has_colr_data (cpal_v1) == TRUE);
+
+  g_assert (hb_ot_color_has_cpal_data (empty) == FALSE);
+  g_assert (hb_ot_color_has_cpal_data (cpal_v0) == TRUE);
+  g_assert (hb_ot_color_has_cpal_data (cpal_v1) == TRUE);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -360,6 +382,7 @@ main (int argc, char **argv)
   hb_test_add (test_hb_ot_color_get_palette_colors_v1);
   hb_test_add (test_hb_ot_color_get_palette_entry);
   hb_test_add (test_hb_ot_color_get_color_layers);
+  hb_test_add (test_hb_ot_color_has_data);
   status = hb_test_run();
   hb_face_destroy (cpal_v0);
   hb_face_destroy (cpal_v1);