ci: tune test cases associated with w3c actions (#920)

* ci: combine two tests to reduce test case

* test: remove no longer necessary error case

* extract empty test case

* Revert "ci: combine two tests to reduce test case"

This reverts commit d3fd51c.

WebDriverAgentTests/IntegrationTests/FBW3CTouchActionsIntegrationTests.m

@@ -70,15 +70,6 @@ - (void)testErroneousGestures
         },
       ],
 
-    // Chain element with empty 'actions'
-    @[@{
-        @"type": @"pointer",
-        @"id": @"finger1",
-        @"parameters": @{@"pointerType": @"touch"},
-        @"actions": @[],
-        },
-      ],
-
     // Chain element without type
     @[@{
         @"id": @"finger1",
@@ -276,6 +267,21 @@ - (void)testErroneousGestures
   }
 }
 
+- (void)testNothingDoesWithoutError
+{
+  NSArray<NSDictionary<NSString *, id> *> *gesture =
+  @[@{
+      @"type": @"pointer",
+      @"id": @"finger1",
+      @"parameters": @{@"pointerType": @"touch"},
+      @"actions": @[],
+      },
+    ];
+  NSError *error;
+  XCTAssertTrue([self.testedApplication fb_performW3CActions:gesture elementCache:nil error:&error]);
+  XCTAssertNil(error);
+}
+
 - (void)testTap
 {
   NSArray<NSDictionary<NSString *, id> *> *gesture =