Updated runJavaScriptForResult behaviour

packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FLTWebViewTests.m

@@ -273,44 +273,8 @@ - (void)testRunJavaScriptForResultReturnsErrorResultForWKError {
                                   binaryMessenger:self.mockBinaryMessenger];
   XCTestExpectation *resultExpectation =
       [self expectationWithDescription:@"Should return error result over the method channel."];
-  NSError *testError =
-      [NSError errorWithDomain:@""
-                          // Any error code but WKErrorJavaScriptResultTypeIsUnsupported
-                          code:WKErrorJavaScriptResultTypeIsUnsupported + 1
-                      userInfo:@{NSLocalizedDescriptionKey : @"Test Error"}];
-  FLTWKWebView *mockView = OCMClassMock(FLTWKWebView.class);
-  [OCMStub([mockView evaluateJavaScript:[OCMArg any]
-                      completionHandler:[OCMArg any]]) andDo:^(NSInvocation *invocation) {
-    // __unsafe_unretained: https://github.com/erikdoe/ocmock/issues/384#issuecomment-589376668
-    __unsafe_unretained void (^evalResultHandler)(id, NSError *);
-    [invocation getArgument:&evalResultHandler atIndex:3];
-    evalResultHandler(nil, testError);
-  }];
-  controller.webView = mockView;
-
-  // Run
-  [controller onMethodCall:[FlutterMethodCall methodCallWithMethodName:@"runJavaScriptForResult"
-                                                             arguments:@"Test JavaScript String"]
-                    result:^(id _Nullable result) {
-                      XCTAssertTrue([result class] == [FlutterError class]);
-                      [resultExpectation fulfill];
-                    }];
-
-  // Verify
-  [self waitForExpectationsWithTimeout:30.0 handler:nil];
-}
-
-- (void)testRunJavaScriptForResultReturnsNilForWKErrorJavaScriptResultTypeIsUnsupported {
-  // Setup
-  FLTWebViewController *controller =
-      [[FLTWebViewController alloc] initWithFrame:CGRectMake(0, 0, 300, 400)
-                                   viewIdentifier:1
-                                        arguments:nil
-                                  binaryMessenger:self.mockBinaryMessenger];
-  XCTestExpectation *resultExpectation =
-      [self expectationWithDescription:@"Should return nil result over the method channel."];
   NSError *testError = [NSError errorWithDomain:@""
-                                           code:WKErrorJavaScriptResultTypeIsUnsupported
+                                           code:5
                                        userInfo:@{NSLocalizedDescriptionKey : @"Test Error"}];
   FLTWKWebView *mockView = OCMClassMock(FLTWKWebView.class);
   [OCMStub([mockView evaluateJavaScript:[OCMArg any]
@@ -326,7 +290,7 @@ - (void)testRunJavaScriptForResultReturnsNilForWKErrorJavaScriptResultTypeIsUnsu
   [controller onMethodCall:[FlutterMethodCall methodCallWithMethodName:@"runJavaScriptForResult"
                                                              arguments:@"Test JavaScript String"]
                     result:^(id _Nullable result) {
-                      XCTAssertNil(result);
+                      XCTAssertTrue([result class] == [FlutterError class]);
                       [resultExpectation fulfill];
                     }];
 

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FlutterWebView.m

@@ -281,15 +281,11 @@ - (void)onRunJavaScriptForResult:(FlutterMethodCall*)call result:(FlutterResult)
   [_webView evaluateJavaScript:jsString
              completionHandler:^(_Nullable id evaluateResult, NSError* _Nullable error) {
                if (error) {
-                 if (error.code != WKErrorJavaScriptResultTypeIsUnsupported) {
-                   result([FlutterError
-                       errorWithCode:@"runJavaScriptForResult_failed"
-                             message:@"Failed running JavaScript"
-                             details:[NSString stringWithFormat:@"JavaScript string was: '%@'\n%@",
-                                                                jsString, error]]);
-                 } else {
-                   result(nil);
-                 }
+                 result([FlutterError
+                     errorWithCode:@"runJavaScriptForResult_failed"
+                           message:@"Failed running JavaScript"
+                           details:[NSString stringWithFormat:@"JavaScript string was: '%@'\n%@",
+                                                              jsString, error]]);
                } else {
                  result([NSString stringWithFormat:@"%@", evaluateResult]);
                }