[test/text-zero-len] Test the public cairo_scaled_font_* with NULLs.

Pass NULL to cairo_scaled_font_(text|glyph)_extents() to test the
consistency of the extents API.

1 files changed, 33 insertions, 0 deletions

diff --git a/test/text-zero-len.c b/test/text-zero-len.c
index e64daa87b..b8cdce6d0 100644
--- a/test/text-zero-len.c
+++ b/test/text-zero-len.c
@@ -71,6 +71,7 @@ draw (cairo_t *cr, int width, int height)
 {
     cairo_text_extents_t nil_extents;
     cairo_text_extents_t extents;
+    cairo_scaled_font_t *scaled_font;
 
     cairo_select_font_face (cr, "Bitstream Vera Sans",
 			    CAIRO_FONT_SLANT_NORMAL,
@@ -121,6 +122,38 @@ draw (cairo_t *cr, int width, int height)
 	return CAIRO_TEST_FAILURE;
     }
 
+    scaled_font = cairo_get_scaled_font (cr);
+
+    memset (&extents, 0xff, sizeof (cairo_text_extents_t));
+    cairo_scaled_font_text_extents (scaled_font, "", &extents);
+    if (! text_extents_equal (&extents, &nil_extents)) {
+	cairo_test_log ("Error: cairo_scaled_font_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n",
+		        extents.x_bearing, extents.y_bearing,
+			extents.width, extents.height,
+			extents.x_advance, extents.y_advance);
+	return CAIRO_TEST_FAILURE;
+    }
+
+    memset (&extents, 0xff, sizeof (cairo_text_extents_t));
+    cairo_scaled_font_text_extents (scaled_font, NULL, &extents);
+    if (! text_extents_equal (&extents, &nil_extents)) {
+	cairo_test_log ("Error: cairo_scaled_font_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
+		        extents.x_bearing, extents.y_bearing,
+			extents.width, extents.height,
+			extents.x_advance, extents.y_advance);
+	return CAIRO_TEST_FAILURE;
+    }
+
+    memset (&extents, 0xff, sizeof (cairo_text_extents_t));
+    cairo_scaled_font_glyph_extents (scaled_font, (void*)8, 0, &extents);
+    if (! text_extents_equal (&extents, &nil_extents)) {
+	cairo_test_log ("Error: cairo_scaled_font_glyph_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
+		        extents.x_bearing, extents.y_bearing,
+			extents.width, extents.height,
+			extents.x_advance, extents.y_advance);
+	return CAIRO_TEST_FAILURE;
+    }
+
     return CAIRO_TEST_SUCCESS;
 }