Forward a11y methods from FlutterSwitchSemanticsObject (flutter/engine#25465)

engine/src/flutter/shell/platform/darwin/ios/framework/Source/SemanticsObject.mm

@@ -66,6 +66,10 @@ flutter::SemanticsAction GetSemanticsActionForScrollDirection(
   [anInvocation invoke];
 }
 
+// The following methods are explicitly forwarded to the wrapped SemanticsObject because the
+// forwarding logic above doesn't apply to them since they are also implemented in the UISwitch
+// class, the base class.
+
 - (CGRect)accessibilityFrame {
   return [_semanticsObject accessibilityFrame];
 }
@@ -97,6 +101,34 @@ flutter::SemanticsAction GetSemanticsActionForScrollDirection(
   }
 }
 
+- (BOOL)accessibilityActivate {
+  return [_semanticsObject accessibilityActivate];
+}
+
+- (void)accessibilityIncrement {
+  [_semanticsObject accessibilityIncrement];
+}
+
+- (void)accessibilityDecrement {
+  [_semanticsObject accessibilityDecrement];
+}
+
+- (BOOL)accessibilityScroll:(UIAccessibilityScrollDirection)direction {
+  return [_semanticsObject accessibilityScroll:direction];
+}
+
+- (BOOL)accessibilityPerformEscape {
+  return [_semanticsObject accessibilityPerformEscape];
+}
+
+- (void)accessibilityElementDidBecomeFocused {
+  [_semanticsObject accessibilityElementDidBecomeFocused];
+}
+
+- (void)accessibilityElementDidLoseFocus {
+  [_semanticsObject accessibilityElementDidLoseFocus];
+}
+
 @end  // FlutterSwitchSemanticsObject
 
 @implementation FlutterCustomAccessibilityAction {

engine/src/flutter/shell/platform/darwin/ios/framework/Source/SemanticsObjectTest.mm

@@ -229,4 +229,35 @@ class MockAccessibilityBridge : public AccessibilityBridgeIos {
   XCTAssertNil(weakObject);
 }
 
+- (void)testFlutterSwitchSemanticsObjectForwardsCalls {
+  SemanticsObject* mockSemanticsObject = OCMClassMock([SemanticsObject class]);
+  FlutterSwitchSemanticsObject* switchObj =
+      [[FlutterSwitchSemanticsObject alloc] initWithSemanticsObject:mockSemanticsObject];
+  OCMStub([mockSemanticsObject accessibilityActivate]).andReturn(YES);
+  OCMStub([mockSemanticsObject accessibilityScroll:UIAccessibilityScrollDirectionRight])
+      .andReturn(NO);
+  OCMStub([mockSemanticsObject accessibilityPerformEscape]).andReturn(YES);
+
+  XCTAssertTrue([switchObj accessibilityActivate]);
+  OCMVerify([mockSemanticsObject accessibilityActivate]);
+
+  [switchObj accessibilityIncrement];
+  OCMVerify([mockSemanticsObject accessibilityIncrement]);
+
+  [switchObj accessibilityDecrement];
+  OCMVerify([mockSemanticsObject accessibilityDecrement]);
+
+  XCTAssertFalse([switchObj accessibilityScroll:UIAccessibilityScrollDirectionRight]);
+  OCMVerify([mockSemanticsObject accessibilityScroll:UIAccessibilityScrollDirectionRight]);
+
+  XCTAssertTrue([switchObj accessibilityPerformEscape]);
+  OCMVerify([mockSemanticsObject accessibilityPerformEscape]);
+
+  [switchObj accessibilityElementDidBecomeFocused];
+  OCMVerify([mockSemanticsObject accessibilityElementDidBecomeFocused]);
+
+  [switchObj accessibilityElementDidLoseFocus];
+  OCMVerify([mockSemanticsObject accessibilityElementDidLoseFocus]);
+}
+
 @end