Add one more test case

Author: sydneyjodon-wk

lib/src/dart3_suggestors/null_safety_prep/connect_required_props.dart

@@ -58,7 +58,9 @@ class ConnectRequiredProps extends RecursiveAstVisitor with ClassSuggestor {
       // Keep a running list of props to ignore per props mixin.
       final fieldName = field.name.name;
       if (_ignoredPropsByMixin[propsElement] != null) {
-        _ignoredPropsByMixin[propsElement]!.add(fieldName);
+        if (!_ignoredPropsByMixin[propsElement]!.contains(fieldName)) {
+          _ignoredPropsByMixin[propsElement]!.add(fieldName);
+        }
       } else {
         _ignoredPropsByMixin[propsElement] = [fieldName];
       }

test/dart3_suggestors/null_safety_prep/connect_required_props_test.dart

@@ -56,23 +56,25 @@ void main() {
       final input = '''
           mixin FooProps on UiProps {
             num setInMapStateToProps;
-            Function() SetInMapDispatchToProps;
+            Function() setInMapDispatchToProps;
+            num setInBoth;
             String notSetInConnect;
           }
           
           UiFactory<FooProps> Foo = connect<FooState, FooProps>(
             mapStateToProps: (state) => (Foo()
               ..addTestId('abc')
               ..setInMapStateToProps = state.count
+              ..setInBoth = 1
             ),
-            mapDispatchToProps: (dispatch) => Foo()..SetInMapDispatchToProps = (() => null),
+            mapDispatchToProps: (dispatch) => Foo()..setInMapDispatchToProps = (() => null)..setInBoth = 1,
           )(uiFunction((props) => (Foo()..notSetInConnect = '1')(), _\$Foo));
         ''';
 
       await testSuggestor(
         input: commonConnectFile(input),
         expectedOutput: commonConnectFile('''
-          @Props(disableRequiredPropValidation: {'setInMapStateToProps', 'SetInMapDispatchToProps'})
+          @Props(disableRequiredPropValidation: {'setInMapStateToProps', 'setInBoth', 'setInMapDispatchToProps'})
           $input
         '''),
       );