GTest unit testing framework

Currently covers only small set of functionality.

1 files changed, 88 insertions, 0 deletions

diff --git a/tests/gtests/blenlib/BLI_math_color_test.cc b/tests/gtests/blenlib/BLI_math_color_test.cc
new file mode 100644
index 00000000000..dd3b3f1add1
--- /dev/null
+++ b/tests/gtests/blenlib/BLI_math_color_test.cc
@@ -0,0 +1,88 @@
+#include "testing/testing.h"
+
+#include "BLI_math.h"
+
+TEST(mathutils, RGBToHSVRoundtrip)
+{
+	float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
+	float hsv[3], rgb[3];
+	rgb_to_hsv_v(orig_rgb, hsv);
+	hsv_to_rgb_v(hsv, rgb);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
+}
+
+TEST(mathutils, RGBToHSLRoundtrip)
+{
+	float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
+	float hsl[3], rgb[3];
+	rgb_to_hsl_v(orig_rgb, hsl);
+	hsl_to_rgb_v(hsl, rgb);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
+}
+
+TEST(mathutils, RGBToYUVRoundtrip)
+{
+	float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
+	float yuv[3], rgb[3];
+	rgb_to_yuv(orig_rgb[0], orig_rgb[1], orig_rgb[2],
+	           &yuv[0], &yuv[1], &yuv[2]);
+	yuv_to_rgb(yuv[0], yuv[1], yuv[2],
+	           &rgb[0], &rgb[1], &rgb[2]);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-4);
+}
+
+TEST(mathutils, RGBToYCCRoundtrip)
+{
+	float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
+	float ycc[3], rgb[3];
+
+	rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
+	           &ycc[0], &ycc[1], &ycc[2],
+	           BLI_YCC_ITU_BT601);
+	ycc_to_rgb(ycc[0], ycc[1], ycc[2],
+	           &rgb[0], &rgb[1], &rgb[2],
+	           BLI_YCC_ITU_BT601);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
+
+	rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
+	           &ycc[0], &ycc[1], &ycc[2],
+	           BLI_YCC_ITU_BT709);
+	ycc_to_rgb(ycc[0], ycc[1], ycc[2],
+	           &rgb[0], &rgb[1], &rgb[2],
+	           BLI_YCC_ITU_BT709);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
+
+	rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
+	           &ycc[0], &ycc[1], &ycc[2],
+	           BLI_YCC_JFIF_0_255);
+	ycc_to_rgb(ycc[0], ycc[1], ycc[2],
+	           &rgb[0], &rgb[1], &rgb[2],
+	           BLI_YCC_JFIF_0_255);
+	EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
+}
+
+TEST(mathutils, LinearRGBTosRGBNearZero)
+{
+	float linear_color = 0.002f;
+	float srgb_color = linearrgb_to_srgb(linear_color);
+	EXPECT_NEAR(0.02584f, srgb_color, 1e-5);
+}
+
+TEST(mathutils, LinearRGBTosRGB)
+{
+	float linear_color = 0.75f;
+	float srgb_color = linearrgb_to_srgb(linear_color);
+	EXPECT_NEAR(0.880824f, srgb_color, 1e-5);
+}
+
+TEST(mathutils, LinearRGBTosRGBRoundtrip)
+{
+	const int N = 50;
+	int i;
+	for (i = 0; i < N; ++i) {
+		float orig_linear_color = (float) i / N;
+		float srgb_color = linearrgb_to_srgb(orig_linear_color);
+		float linear_color = srgb_to_linearrgb(srgb_color);
+		EXPECT_NEAR(orig_linear_color, linear_color, 1e-5);
+	}
+}