[iOS] Separate dispatch and dismiss OverlayRequestMediator selectors

This allows OverlayRequestMediator subclasses to dispatch multiple
responses before dismissal for a single UI interaction event.

Bug: none
Change-Id: I6248d6d5a369dc9b25c3a5f88a1f8962241505b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1996160
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#731813}

ios/chrome/browser/ui/overlays/infobar_banner/infobar_banner_overlay_mediator.mm

@@ -45,27 +45,27 @@
 - (void)bannerInfobarButtonWasPressed:(UIButton*)sender {
   // Notify the model layer to perform the infobar's main action before
   // dismissing the banner.
-  [self dispatchResponseAndStopOverlay:OverlayResponse::CreateWithInfo<
+  [self dispatchResponse:OverlayResponse::CreateWithInfo<
                              InfobarBannerMainActionResponse>()];
+  [self dismissOverlay];
 }
 
 - (void)dismissInfobarBannerForUserInteraction:(BOOL)userInitiated {
   if (userInitiated) {
     // Notify the model layer of user-initiated banner dismissal before
     // dismissing the banner.
-    [self dispatchResponseAndStopOverlay:
-              OverlayResponse::CreateWithInfo<
+    [self dispatchResponse:OverlayResponse::CreateWithInfo<
                                InfobarBannerUserInitiatedDismissalResponse>()];
-  } else {
-    [self.delegate stopOverlayForMediator:self];
   }
+  [self dismissOverlay];
 }
 
 - (void)presentInfobarModalFromBanner {
   // Notify the model layer to show the infobar modal before dismissing the
   // banner.
-  [self dispatchResponseAndStopOverlay:OverlayResponse::CreateWithInfo<
+  [self dispatchResponse:OverlayResponse::CreateWithInfo<
                              InfobarBannerShowModalResponse>()];
+  [self dismissOverlay];
 }
 
 - (void)infobarBannerWasDismissed {

ios/chrome/browser/ui/overlays/infobar_modal/infobar_modal_overlay_mediator.mm

@@ -23,8 +23,9 @@
 }
 
 - (void)modalInfobarButtonWasAccepted:(id)infobarModal {
-  [self dispatchResponseAndStopOverlay:OverlayResponse::CreateWithInfo<
+  [self dispatchResponse:OverlayResponse::CreateWithInfo<
                              InfobarModalMainActionResponse>()];
+  [self dismissOverlay];
 }
 
 - (void)modalInfobarWasDismissed:(id)infobarModal {

ios/chrome/browser/ui/overlays/overlay_request_mediator+subclassing.h

@@ -14,10 +14,12 @@
 // Exposes shared functionality for OverlayRequestMediator subclasses.
 @interface OverlayRequestMediator (Subclassing)
 
-// Dispatches |response| through the mediator's request callback manager, then
-// instructs the delegate to stop the overlay.
-- (void)dispatchResponseAndStopOverlay:
-    (std::unique_ptr<OverlayResponse>)response;
+// Dispatches |response| through the mediator's request callback manager.  Does
+// nothing if the request has been cancelled.
+- (void)dispatchResponse:(std::unique_ptr<OverlayResponse>)response;
+
+// Instructs the delegate to stop the overlay.
+- (void)dismissOverlay;
 
 @end
 

ios/chrome/browser/ui/overlays/overlay_request_mediator.mm

@@ -55,10 +55,12 @@
 
 @implementation OverlayRequestMediator (Subclassing)
 
-- (void)dispatchResponseAndStopOverlay:
-    (std::unique_ptr<OverlayResponse>)response {
+- (void)dispatchResponse:(std::unique_ptr<OverlayResponse>)response {
   if (self.request)
     self.request->GetCallbackManager()->DispatchResponse(std::move(response));
+}
+
+- (void)dismissOverlay {
   [self.delegate stopOverlayForMediator:self];
 }
 

ios/chrome/browser/ui/overlays/overlay_request_mediator_unittest.mm

@@ -39,9 +39,8 @@ TEST_F(OverlayRequestMediatorTest, ResetRequestAfterDestruction) {
   EXPECT_EQ(nullptr, mediator.request);
 }
 
-// Tests that the |-dispatchResponseAndStopOverlay:| correctly dispatches the
-// response and stops the overlay.
-TEST_F(OverlayRequestMediatorTest, DispatchResponseAndStopOverlay) {
+// Tests that |-dispatchResponse:| correctly dispatches the response.
+TEST_F(OverlayRequestMediatorTest, DispatchResponse) {
   std::unique_ptr<OverlayRequest> request =
       OverlayRequest::CreateWithConfig<FakeOverlayUserData>();
   // Add a dispatch callback that sets |dispatch_callback_executed| to true
@@ -58,13 +57,24 @@ TEST_F(OverlayRequestMediatorTest, DispatchResponseAndStopOverlay) {
                               DispatchInfo::ResponseSupport()));
   OverlayRequestMediator* mediator =
       [[OverlayRequestMediator alloc] initWithRequest:request.get()];
+  // Dispatch the response and verify |dipatch_callback_executed|.
+  [mediator dispatchResponse:std::move(dispatched_response)];
+
+  EXPECT_TRUE(dispatch_callback_executed);
+}
+
+// Tests that |-dismissOverlay| stops the overlay.
+TEST_F(OverlayRequestMediatorTest, DismissOverlay) {
+  std::unique_ptr<OverlayRequest> request =
+      OverlayRequest::CreateWithConfig<FakeOverlayUserData>();
+  OverlayRequestMediator* mediator =
+      [[OverlayRequestMediator alloc] initWithRequest:request.get()];
   id<OverlayRequestMediatorDelegate> delegate =
       OCMStrictProtocolMock(@protocol(OverlayRequestMediatorDelegate));
   mediator.delegate = delegate;
   OCMExpect([delegate stopOverlayForMediator:mediator]);
 
-  [mediator dispatchResponseAndStopOverlay:std::move(dispatched_response)];
+  [mediator dismissOverlay];
 
-  EXPECT_TRUE(dispatch_callback_executed);
   EXPECT_OCMOCK_VERIFY(delegate);
 }