4 files changed, 62 insertions, 29 deletions

diff --git a/test/blender/blender.c b/test/blender/blender.c
deleted file mode 100644
index f42322f..0000000
--- a/test/blender/blender.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "blender/blender.h"
-#include <assert.h>
-
-static void test_canvas_blending() {
-  Morphing *morphing;
-  Canvas origin, target, result;
-  CartesianVector sample_point = {13, 17};
-
-  morphing = morphing_create(64, 64);
-  canvas_init(&origin, 64, 64);
-  canvas_init(&target, 64, 64);
-  canvas_init(&result, 64, 64);
-
-  canvas_set_pixel(&origin, sample_point, (Color) {{0xFF, 0xED, 0x00, 0x00}});
-  canvas_set_pixel(&target, sample_point, (Color) {{0x00, 0x47, 0xAB, 0x00}});
-
-  blender_blend_canvas(&result, &origin, &target, morphing, 0.125);
-  assert(color_equals(canvas_get_pixel(&result, sample_point), (Color) {{0xEE, 0xDF, 0x3C, 0x00}}));
-
-  canvas_free(&result);
-  canvas_free(&target);
-  canvas_free(&origin);
-  morphing_destroy(morphing);
-}
-
-int main(int argc, char **argv) {
-  test_canvas_blending();
-  return 0;
-}
diff --git a/test/common/geom.c b/test/common/geom.c
new file mode 100644
index 0000000..f05e0a1
--- /dev/null
+++ b/test/common/geom.c
@@ -0,0 +1,21 @@
+#include "common/geom.h"
+#include <assert.h>
+
+static void test_square_area() {
+  assert(square_area(v(0, 0), v(10, 0), v(10, 10)) == 100);
+  assert(square_area(v(0, 0), v(0, 10), v(10, 10)) == -100);
+}
+
+static void test_cartesian_barycentric_vectors() {
+  Triangle t = {{v(0, 0), v(10, 0), v(10, 10)}};
+  CartesianVector c = v(3, 2);
+  BarycentricVector bv = cartesian_to_barycentric(t, c);
+  assert(barycentric_vector_equals(bv, b(0.7, 0.1)));
+  assert(vector_equals(barycentric_to_cartesian(t, bv), c));
+}
+
+int main(int argc, char **argv) {
+  test_square_area();
+  test_cartesian_barycentric_vectors();
+  return 0;
+}
diff --git a/test/painter/color.c b/test/painter/color.c
new file mode 100644
index 0000000..bdfe9b3
--- /dev/null
+++ b/test/painter/color.c
@@ -0,0 +1,14 @@
+#include "painter/color.h"
+#include <assert.h>
+
+static void test_color_blend() {
+  Color a = {{1, 10, 100, 200}}, b = {{100, 1, 200, 10}};
+  assert(color_equals(color_blend(a, b, TIME_ORIGIN), a));
+  assert(color_equals(color_blend(a, b, TIME_UNIT), b));
+  assert(color_equals(color_blend(a, b, 0.25), (Color) {{50, 9, 132, 173}}));
+}
+
+int main(int argc, char **argv) {
+  test_color_blend();
+  return 0;
+}
diff --git a/test/painter/rasterizer.c b/test/painter/rasterizer.c
new file mode 100644
index 0000000..99a70b4
--- /dev/null
+++ b/test/painter/rasterizer.c
@@ -0,0 +1,27 @@
+#include "painter/rasterizer.h"
+#include <assert.h>
+
+static void test_rasterize() {
+  Morphing *morphing;
+  Canvas *origin, *target, *result;
+  CartesianVector sample_point = {13, 17};
+
+  morphing = morphing_create(100, 100);
+  origin = canvas_create(100, 100);
+  target = canvas_create(100, 100);
+  canvas_set_pixel(origin, sample_point, (Color) {{0xFF, 0x00, 0xED, 0xFF}});
+  canvas_set_pixel(target, sample_point, (Color) {{0xFF, 0xAB, 0x47, 0x00}});
+
+  result = rasterize(origin, target, morphing, 0.125);
+  assert(color_equals(canvas_get_pixel(result, sample_point), (Color) {{0xFF, 0x3C, 0xDF, 0xEF}}));
+
+  canvas_destroy(result);
+  canvas_destroy(target);
+  canvas_destroy(origin);
+  morphing_destroy(morphing);
+}
+
+int main(int argc, char **argv) {
+  test_rasterize();
+  return 0;
+}