test: add focus test to all fields

Author: deandreamatias

lib/src/fields/form_builder_checkbox.dart

@@ -125,9 +125,11 @@ class FormBuilderCheckbox extends FormBuilderFieldDecoration<bool> {
 
             return InputDecorator(
               decoration: state.decoration,
+              isFocused: state.effectiveFocusNode.hasFocus,
               child: CheckboxListTile(
                 dense: true,
                 isThreeLine: false,
+                focusNode: state.effectiveFocusNode,
                 title: title,
                 subtitle: subtitle,
                 value: tristate ? state.value : (state.value ?? false),
@@ -158,4 +160,26 @@ class FormBuilderCheckbox extends FormBuilderFieldDecoration<bool> {
 }
 
 class _FormBuilderCheckboxState
-    extends FormBuilderFieldDecorationState<FormBuilderCheckbox, bool> {}
+    extends FormBuilderFieldDecorationState<FormBuilderCheckbox, bool> {
+  void handleFocusChange() {
+    setState(() {});
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    effectiveFocusNode.addListener(handleFocusChange);
+  }
+
+  @override
+  void dispose() {
+    effectiveFocusNode.removeListener(handleFocusChange);
+    super.dispose();
+  }
+
+  @override
+  void didChange(bool? value) {
+    focus();
+    super.didChange(value);
+  }
+}

lib/src/fields/form_builder_choice_chips.dart

@@ -397,6 +397,7 @@ class FormBuilderChoiceChip<T> extends FormBuilderFieldDecoration<T> {
 
           return InputDecorator(
             decoration: state.decoration,
+            isFocused: state.effectiveFocusNode.hasFocus,
             child: Wrap(
               direction: direction,
               alignment: alignment,
@@ -455,4 +456,27 @@ class FormBuilderChoiceChip<T> extends FormBuilderFieldDecoration<T> {
 }
 
 class _FormBuilderChoiceChipState<T>
-    extends FormBuilderFieldDecorationState<FormBuilderChoiceChip<T>, T> {}
+    extends FormBuilderFieldDecorationState<FormBuilderChoiceChip<T>, T> {
+  void handleFocusChange() {
+    setState(() {});
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    effectiveFocusNode.addListener(handleFocusChange);
+  }
+
+  @override
+  void dispose() {
+    effectiveFocusNode.removeListener(handleFocusChange);
+    super.dispose();
+  }
+
+  @override
+  void didChange(T? value) {
+    focus();
+    // effectiveFocusNode.requestFocus();
+    super.didChange(value);
+  }
+}