[test] Use test::checkImage in API.RepeatedRender

test/api/repeated_render.test.cpp

@@ -25,7 +25,7 @@ TEST(API, RepeatedRender) {
 
     HeadlessBackend backend { test::sharedDisplay() };
     BackendScope scope { backend };
-    OffscreenView view { backend.getContext(), { 256, 512 } };
+    OffscreenView view { backend.getContext(), { 512, 512 } };
     DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets");
     ThreadPool threadPool(4);
 
@@ -44,11 +44,9 @@ TEST(API, RepeatedRender) {
             loop.runOnce();
         }
 
-        ASSERT_EQ(256u, result.size.width);
+        ASSERT_EQ(512u, result.size.width);
         ASSERT_EQ(512u, result.size.height);
-#if !TEST_READ_ONLY
-        util::write_file("test/fixtures/api/1.png", encodePNG(result));
-#endif
+        test::checkImage("test/fixtures/api/repeated_render", result, 0.0003, 0.1);
     }
 
     {
@@ -62,11 +60,9 @@ TEST(API, RepeatedRender) {
             loop.runOnce();
         }
 
-        ASSERT_EQ(256u, result.size.width);
+        ASSERT_EQ(512u, result.size.width);
         ASSERT_EQ(512u, result.size.height);
-#if !TEST_READ_ONLY
-        util::write_file("test/fixtures/api/2.png", encodePNG(result));
-#endif
+        test::checkImage("test/fixtures/api/repeated_render", result, 0.0003, 0.1);
     }
 
     auto observer = Log::removeObserver();