1 files changed, 58 insertions, 0 deletions
diff --git a/libfonts_get_subpixel_expansion.c b/libfonts_get_subpixel_expansion.c
index 99f72ba..e63d729 100644
--- a/libfonts_get_subpixel_expansion.c
+++ b/libfonts_get_subpixel_expansion.c
@@ -45,6 +45,64 @@ libfonts_get_subpixel_expansion(enum libfonts_subpixel_order_class layout, size_
 int
 main(void)
 {
+	size_t w, h;
+
+#define T(L)\
+	do {\
+		errno = 0;\
+		ASSERT(libfonts_get_subpixel_expansion(L, NULL, NULL) == -1);\
+		ASSERT(errno == EINVAL);\
+		\
+		errno = 0;\
+		ASSERT(libfonts_get_subpixel_expansion(L, &w, NULL) == -1);\
+		ASSERT(errno == EINVAL);\
+		\
+		errno = 0;\
+		ASSERT(libfonts_get_subpixel_expansion(L, NULL, &h) == -1);\
+		ASSERT(errno == EINVAL);\
+		\
+		errno = 0;\
+		ASSERT(libfonts_get_subpixel_expansion(L, &w, &h) == -1);\
+		ASSERT(errno == EINVAL);\
+	} while (0)
+
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_OTHER);
+	T((enum libfonts_subpixel_order_class)999);
+
+#undef T
+
+#define T(L, W, H)\
+	do {\
+		w = 0, h = 0;\
+		ASSERT(!libfonts_get_subpixel_expansion(L, NULL, NULL));\
+		\
+		w = 0, h = 0;\
+		ASSERT(!libfonts_get_subpixel_expansion(L, &w, NULL));\
+		ASSERT(w == (W));\
+		\
+		w = 0, h = 0;\
+		ASSERT(!libfonts_get_subpixel_expansion(L, NULL, &h));\
+		ASSERT(h == (H));\
+		\
+		w = 0, h = 0;\
+		ASSERT(!libfonts_get_subpixel_expansion(L, &w, &h));\
+		ASSERT(w == (W));\
+		ASSERT(h == (H));\
+	} while (0)
+
+	errno = EDOM;
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_123, 3, 1);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_1_2_3, 1, 3);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_11_23, 2, 2);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_21_31, 2, 2);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_32_11, 2, 2);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_13_12, 2, 2);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_BALANCED_11_23, 2, 3);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_BALANCED_21_31, 3, 2);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_BALANCED_32_11, 2, 3);
+	T(LIBFONTS_SUBPIXEL_ORDER_CLASS_BALANCED_13_12, 3, 2);
+	ASSERT(errno == EDOM);
+
 	return 0;
 }