fix: tab & enter test

frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/tab_handler.dart

@@ -13,15 +13,19 @@ ShortcutEventHandler tabHandler = (editorState, event) {
 
   final textNode = textNodes.first;
   final previous = textNode.previous;
-  if (textNode.subtype != BuiltInAttributeKey.bulletedList ||
+
-      previous == null ||
+  if (textNode.subtype != BuiltInAttributeKey.bulletedList) {
-      previous.subtype != BuiltInAttributeKey.bulletedList) {
     TransactionBuilder(editorState)
       ..insertText(textNode, selection.end.offset, ' ' * 4)
       ..commit();
     return KeyEventResult.handled;
   }
 
+  if (previous == null ||
+      previous.subtype != BuiltInAttributeKey.bulletedList) {
+    return KeyEventResult.ignored;
+  }
+
   final path = previous.path + [previous.children.length];
   final afterSelection = Selection(
     start: selection.start.copyWith(path: path),

frontend/app_flowy/packages/appflowy_editor/test/service/internal_key_event_handlers/enter_without_shift_in_text_node_handler_test.dart

@@ -2,7 +2,6 @@ import 'package:appflowy_editor/appflowy_editor.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import '../../infra/test_editor.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
 
 void main() async {
   setUpAll(() {
@@ -171,13 +170,27 @@ Future<void> _testStyleNeedToBeCopy(WidgetTester tester, String style) async {
     LogicalKeyboardKey.enter,
   );
   expect(editor.documentSelection, Selection.single(path: [4], startOffset: 0));
-  expect(editor.nodeAtPath([4])?.subtype, style);
 
-  await editor.pressLogicKey(
+  if ([BuiltInAttributeKey.heading, BuiltInAttributeKey.quote]
-    LogicalKeyboardKey.enter,
+      .contains(style)) {
-  );
+    expect(editor.nodeAtPath([4])?.subtype, null);
-  expect(editor.documentSelection, Selection.single(path: [4], startOffset: 0));
+
-  expect(editor.nodeAtPath([4])?.subtype, null);
+    await editor.pressLogicKey(
+      LogicalKeyboardKey.enter,
+    );
+    expect(
+        editor.documentSelection, Selection.single(path: [5], startOffset: 0));
+    expect(editor.nodeAtPath([5])?.subtype, null);
+  } else {
+    expect(editor.nodeAtPath([4])?.subtype, style);
+
+    await editor.pressLogicKey(
+      LogicalKeyboardKey.enter,
+    );
+    expect(
+        editor.documentSelection, Selection.single(path: [4], startOffset: 0));
+    expect(editor.nodeAtPath([4])?.subtype, null);
+  }
 }
 
 Future<void> _testMultipleSelection(

frontend/app_flowy/packages/appflowy_editor/test/service/internal_key_event_handlers/tab_handler_test.dart

@@ -15,23 +15,24 @@ void main() async {
         ..insertTextNode(text)
         ..insertTextNode(text);
       await editor.startTesting();
-      final document = editor.document;
 
       var selection = Selection.single(path: [0], startOffset: 0);
       await editor.updateSelection(selection);
       await editor.pressLogicKey(LogicalKeyboardKey.tab);
 
-      // nothing happens
+      expect(
-      expect(editor.documentSelection, selection);
+        editor.documentSelection,
-      expect(editor.document.toJson(), document.toJson());
+        Selection.single(path: [0], startOffset: 4),
+      );
 
       selection = Selection.single(path: [1], startOffset: 0);
       await editor.updateSelection(selection);
       await editor.pressLogicKey(LogicalKeyboardKey.tab);
 
-      // nothing happens
+      expect(
-      expect(editor.documentSelection, selection);
+        editor.documentSelection,
-      expect(editor.document.toJson(), document.toJson());
+        Selection.single(path: [1], startOffset: 4),
+      );
     });
 
     testWidgets('press tab in bulleted list', (tester) async {
@@ -63,7 +64,10 @@ void main() async {
       await editor.pressLogicKey(LogicalKeyboardKey.tab);
 
       // nothing happens
-      expect(editor.documentSelection, selection);
+      expect(
+        editor.documentSelection,
+        Selection.single(path: [0], startOffset: 0),
+      );
       expect(editor.document.toJson(), document.toJson());
 
       // Before