[core] Update ImageManager.OnStyleImageMissingBeforeSpriteLoaded unit test

So that it checks missing images requests coalescing.

1 files changed, 14 insertions, 0 deletions

diff --git a/test/renderer/image_manager.test.cpp b/test/renderer/image_manager.test.cpp
index 16700d713f..f1061ce59e 100644
--- a/test/renderer/image_manager.test.cpp
+++ b/test/renderer/image_manager.test.cpp
@@ -187,6 +187,20 @@ TEST(ImageManager, OnStyleImageMissingBeforeSpriteLoaded) {
     EXPECT_EQ(observer.count, 1);
     ASSERT_TRUE(notified);
 
+    // Repeated request of the same image shall not result another
+    // `ImageManagerObserver.onStyleImageMissing()` call.
+    imageManager.getImages(requestor, std::make_pair(dependencies, imageCorrelationID));
+    runLoop.runOnce();
+
+    EXPECT_EQ(observer.count, 1);
+
+    // Request for updated dependencies must be dispatched to the
+    // observer.
+    dependencies.emplace("post", ImageType::Icon);
+    imageManager.getImages(requestor, std::make_pair(dependencies, imageCorrelationID));
+    runLoop.runOnce();
+
+    EXPECT_EQ(observer.count, 2);
 }
 
 TEST(ImageManager, OnStyleImageMissingAfterSpriteLoaded) {