// Unit tests for DiffusionEffect.
-#include "test_util.h"
-#include "gtest/gtest.h"
#include "diffusion_effect.h"
+#include "effect_chain.h"
+#include "gtest/gtest.h"
+#include "image_format.h"
+#include "test_util.h"
TEST(DiffusionEffectTest, IdentityTransformDoesNothing) {
const int size = 4;