fix: do nothing for an empty array in w3c actions (#919)

* fix: do nothing for an empty array actions

* Update FBW3CActionsSynthesizer.m

* test: add test

Author: KazuCocoa

WebDriverAgentLib/Utilities/FBW3CActionsSynthesizer.m

@@ -692,14 +692,6 @@ @implementation FBW3CActionsSynthesizer
   });
 
   NSArray<NSDictionary<NSString *, id> *> *actionItems = [actionDescription objectForKey:FB_KEY_ACTIONS];
-  if (nil == actionItems || 0 == actionItems.count) {
-   NSString *description = [NSString stringWithFormat:@"It is mandatory to have at least one item defined for each action. Action with id '%@' contains none", actionId];
-    if (error) {
-      *error = [[FBErrorBuilder.builder withDescription:description] build];
-    }
-    return nil;
-  }
-
   FBW3CKeyItemsChain *chain = [[FBW3CKeyItemsChain alloc] init];
   NSArray<NSDictionary<NSString *, id> *> *processedItems = [self preprocessedActionItemsWith:actionItems];
   for (NSDictionary<NSString *, id> *actionItem in processedItems) {
@@ -770,14 +762,6 @@ @implementation FBW3CActionsSynthesizer
   }
 
   NSArray<NSDictionary<NSString *, id> *> *actionItems = [actionDescription objectForKey:FB_KEY_ACTIONS];
-  if (nil == actionItems || 0 == actionItems.count) {
-   NSString *description = [NSString stringWithFormat:@"It is mandatory to have at least one gesture item defined for each action. Action with id '%@' contains none", actionId];
-    if (error) {
-      *error = [[FBErrorBuilder.builder withDescription:description] build];
-    }
-    return nil;
-  }
-
   FBW3CGestureItemsChain *chain = [[FBW3CGestureItemsChain alloc] init];
   NSArray<NSDictionary<NSString *, id> *> *processedItems = [self preprocessedActionItemsWith:actionItems];
   for (NSDictionary<NSString *, id> *actionItem in processedItems) {
@@ -852,7 +836,20 @@ - (nullable XCSynthesizedEventRecord *)synthesizeWithError:(NSError **)error
         *error = [[FBErrorBuilder.builder withDescription:description] build];
       }
       return nil;
+    }    
+    NSArray<NSDictionary<NSString *, id> *> *actionItems = [action objectForKey:FB_KEY_ACTIONS];
+    if (nil == actionItems) {
+     NSString *description = [NSString stringWithFormat:@"It is mandatory to have at least one item defined for each action. Action with id '%@' contains none", actionId];
+      if (error) {
+        *error = [[FBErrorBuilder.builder withDescription:description] build];
+      }
+      return nil;
+    }
+    if (0 == actionItems.count) {
+      [FBLogger logFmt:@"Action items in the action id '%@' had an empty array. Skipping the action.", actionId];
+      continue;
     }
+
     [actionIds addObject:actionId];
     [actionsMapping setObject:action forKey:actionId];
   }

WebDriverAgentTests/IntegrationTests/FBW3CTypeActionsTests.m

@@ -158,4 +158,28 @@ - (void)testTextTyping
   XCTAssertEqualObjects(textField.wdValue, @"🏀NBA");
 }
 
+- (void)testTextTypingWithEmptyActions
+{
+  if (![XCPointerEvent.class fb_areKeyEventsSupported]) {
+    return;
+  }
+
+  XCUIElement *textField = self.testedApplication.textFields[@"aIdentifier"];
+  [textField tap];
+  NSArray<NSDictionary<NSString *, id> *> *typeAction =
+    @[
+      @{
+      @"type": @"pointer",
+      @"id": @"touch",
+      @"actions": @[],
+      },
+    ];
+  NSError *error;
+  XCTAssertTrue([self.testedApplication fb_performW3CActions:typeAction
+                                                elementCache:nil
+                                                       error:&error]);
+  XCTAssertNil(error);
+  XCTAssertEqualObjects(textField.value, @"");
+}
+
 @end