Bubble collapse.

Signal/src/ViewControllers/DebugUI/DebugUIMessages.m

@@ -442,6 +442,8 @@ NS_ASSUME_NONNULL_BEGIN
         [self sendJpegAction:thread hasCaption:YES],
         [self sendGifAction:thread hasCaption:NO],
         [self sendGifAction:thread hasCaption:YES],
+        [self sendLargeGifAction:thread hasCaption:NO],
+        [self sendLargeGifAction:thread hasCaption:YES],
         [self sendMp3Action:thread hasCaption:NO],
         [self sendMp3Action:thread hasCaption:YES],
         [self sendMp4Action:thread hasCaption:NO],
@@ -470,6 +472,16 @@ NS_ASSUME_NONNULL_BEGIN
                           thread:thread];
 }
 
++ (DebugUIMessagesAction *)sendLargeGifAction:(TSThread *)thread hasCaption:(BOOL)hasCaption
+{
+    OWSAssert(thread);
+
+    return [self sendMediaAction:@"Send Large Gif"
+                      hasCaption:hasCaption
+                 fakeAssetLoader:[DebugUIMessagesAssetLoader largeGifInstance]
+                          thread:thread];
+}
+
 + (DebugUIMessagesAction *)sendMp3Action:(TSThread *)thread hasCaption:(BOOL)hasCaption
 {
     OWSAssert(thread);
@@ -574,6 +586,19 @@ NS_ASSUME_NONNULL_BEGIN
                                   thread:thread];
 }
 
++ (DebugUIMessagesAction *)fakeOutgoingLargeGifAction:(TSThread *)thread
+                                         messageState:(TSOutgoingMessageState)messageState
+                                           hasCaption:(BOOL)hasCaption
+{
+    OWSAssert(thread);
+
+    return [self fakeOutgoingMediaAction:@"Fake Outgoing Large Gif"
+                            messageState:messageState
+                              hasCaption:hasCaption
+                         fakeAssetLoader:[DebugUIMessagesAssetLoader largeGifInstance]
+                                  thread:thread];
+}
+
 + (DebugUIMessagesAction *)fakeOutgoingMp3Action:(TSThread *)thread
                                     messageState:(TSOutgoingMessageState)messageState
                                       hasCaption:(BOOL)hasCaption
@@ -876,6 +901,19 @@ NS_ASSUME_NONNULL_BEGIN
                                   thread:thread];
 }
 
++ (DebugUIMessagesAction *)fakeIncomingLargeGifAction:(TSThread *)thread
+                               isAttachmentDownloaded:(BOOL)isAttachmentDownloaded
+                                           hasCaption:(BOOL)hasCaption
+{
+    OWSAssert(thread);
+
+    return [self fakeIncomingMediaAction:@"Fake Incoming Large Gif"
+                  isAttachmentDownloaded:isAttachmentDownloaded
+                              hasCaption:hasCaption
+                         fakeAssetLoader:[DebugUIMessagesAssetLoader largeGifInstance]
+                                  thread:thread];
+}
+
 + (DebugUIMessagesAction *)fakeIncomingMp3Action:(TSThread *)thread
                           isAttachmentDownloaded:(BOOL)isAttachmentDownloaded
                                       hasCaption:(BOOL)hasCaption
@@ -1182,6 +1220,7 @@ NS_ASSUME_NONNULL_BEGIN
     [actions addObjectsFromArray:@[
         // Don't bother with multiple GIF states.
         [self fakeOutgoingGifAction:thread messageState:TSOutgoingMessageStateSentToService hasCaption:NO],
+        [self fakeOutgoingLargeGifAction:thread messageState:TSOutgoingMessageStateSentToService hasCaption:NO],
     ]];
     if (includeLabels) {
         [actions addObject:[self fakeOutgoingTextMessageAction:thread
@@ -1363,6 +1402,7 @@ NS_ASSUME_NONNULL_BEGIN
     }
     [actions addObjectsFromArray:@[
         [self fakeIncomingGifAction:thread isAttachmentDownloaded:YES hasCaption:NO],
+        [self fakeIncomingLargeGifAction:thread isAttachmentDownloaded:YES hasCaption:NO],
     ]];
     if (includeLabels) {
         [actions addObject:[self fakeIncomingTextMessageAction:thread text:@"⚠️ Incoming Mp3 ⚠️"]];

Signal/src/ViewControllers/DebugUI/DebugUIMessagesAssetLoader.h

@@ -19,6 +19,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 + (instancetype)jpegInstance;
 + (instancetype)gifInstance;
++ (instancetype)largeGifInstance;
 + (instancetype)mp3Instance;
 + (instancetype)mp4Instance;
 + (instancetype)compactPortraitPngInstance;

Signal/src/ViewControllers/DebugUI/DebugUIMessagesAssetLoader.m

@@ -342,6 +342,18 @@ NS_ASSUME_NONNULL_BEGIN
     return instance;
 }
 
++ (instancetype)largeGifInstance
+{
+    static DebugUIMessagesAssetLoader *instance = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        instance =
+            [DebugUIMessagesAssetLoader fakeAssetLoaderWithUrl:@"https://i.giphy.com/media/LTw0F3GAdaao8/source.gif"
+                                                      mimeType:@"image/gif"];
+    });
+    return instance;
+}
+
 + (instancetype)mp3Instance
 {
     static DebugUIMessagesAssetLoader *instance = nil;