// Unit tests for FlatInput.
-#include "test_util.h"
-#include "gtest/gtest.h"
+#include <stddef.h>
+
+#include "effect_chain.h"
#include "flat_input.h"
+#include "gtest/gtest.h"
+#include "test_util.h"
TEST(FlatInput, SimpleGrayscale) {
const int size = 4;