fix: resolve data loss issue during block type conversion (#726)

* fix: resolve data loss issue during block type conversion

* fix: flutter test

* test: add more tests

test/new/block_component/bulleted_list_block_component/bulleted_list_character_shortcut_test.dart

@@ -21,7 +21,7 @@ void main() async {
         (result, before, after, editorState) {
           expect(result, true);
           expect(after.delta!.toPlainText(), text);
-          expect(after.type, 'bulleted_list');
+          expect(after.type, BulletedListBlockKeys.type);
         },
         text: text,
       );

test/new/block_component/heading_block_component/heading_character_shortcut_test.dart

@@ -116,5 +116,32 @@ void main() async {
       expect(after.type, 'heading');
       expect(after.delta!.toPlainText(), text);
     });
+
+    test('convert bulleted_list to heading', () async {
+      const syntax = '#';
+      const text = 'Welcome to AppFlowy Editor 🔥!';
+      testFormatCharacterShortcut(
+        formatSignToHeading,
+        syntax,
+        syntax.length,
+        (result, before, after, editorState) {
+          expect(result, true);
+          expect(after.delta!.toPlainText(), text);
+          expect(after.type, HeadingBlockKeys.type);
+          expect(after.attributes[HeadingBlockKeys.level], 1);
+          expect(after.children.isEmpty, true);
+          expect(after.next!.delta!.toPlainText(), '1 $text');
+          expect(after.next!.next!.delta!.toPlainText(), '2 $text');
+        },
+        text: text,
+        node: bulletedListNode(
+          text: '$syntax$text',
+          children: [
+            bulletedListNode(text: '1 $text'),
+            bulletedListNode(text: '2 $text'),
+          ],
+        ),
+      );
+    });
   });
 }

test/new/block_component/numbered_list_block_component/numbered_list_character_shortcut_test.dart

@@ -172,5 +172,31 @@ void main() async {
       expect(after.type, ParagraphBlockKeys.type);
       expect(after.delta!.toPlainText(), '3.');
     });
+
+    test('convert todo_list to bulleted_list', () async {
+      const syntax = '1.';
+      const text = 'Welcome to AppFlowy Editor 🔥!';
+      testFormatCharacterShortcut(
+        formatNumberToNumberedList,
+        syntax,
+        syntax.length,
+        (result, before, after, editorState) {
+          expect(result, true);
+          expect(after.delta!.toPlainText(), text);
+          expect(after.type, NumberedListBlockKeys.type);
+          expect(after.children[0].delta!.toPlainText(), '1 $text');
+          expect(after.children[1].delta!.toPlainText(), '2 $text');
+        },
+        text: text,
+        node: todoListNode(
+          text: '$syntax$text',
+          checked: false,
+          children: [
+            todoListNode(text: '1 $text', checked: false),
+            todoListNode(text: '2 $text', checked: false),
+          ],
+        ),
+      );
+    });
   });
 }

test/new/block_component/test_character_shortcut.dart

@@ -10,10 +10,16 @@ Future<void> testFormatCharacterShortcut(
   void Function(bool result, Node before, Node after, EditorState editorState)
       test, {
   String text = 'Welcome to AppFlowy Editor 🔥!',
+  Node? node,
 }) async {
-  final document = Document.blank().addParagraph(
-    builder: (index) => Delta()..insert('$prefix$text'),
-  );
+  final document = Document.blank();
+  if (node != null) {
+    document.insert([0], [node]);
+  } else {
+    document.addParagraph(
+      builder: (index) => Delta()..insert('$prefix$text'),
+    );
+  }
   final editorState = EditorState(document: document);
 
   final selection = Selection.collapsed(

test/new/block_component/todo_list_block_component/todo_list_character_shortcut_test.dart

@@ -86,6 +86,32 @@ void main() async {
           text: text,
         );
       });
+
+      test('convert numbered_list to todo_list', () async {
+        const syntax = '-[x]';
+        const text = 'Welcome to AppFlowy Editor 🔥!';
+        testFormatCharacterShortcut(
+          formatHyphenFilledBracketsToCheckedBox,
+          syntax,
+          syntax.length,
+          (result, before, after, editorState) {
+            expect(result, true);
+            expect(after.delta!.toPlainText(), text);
+            expect(after.type, TodoListBlockKeys.type);
+            expect(after.attributes[TodoListBlockKeys.checked], true);
+            expect(after.children[0].delta!.toPlainText(), '1 $text');
+            expect(after.children[1].delta!.toPlainText(), '2 $text');
+          },
+          text: text,
+          node: bulletedListNode(
+            text: '$syntax$text',
+            children: [
+              bulletedListNode(text: '1 $text'),
+              bulletedListNode(text: '2 $text'),
+            ],
+          ),
+        );
+      });
     },
   );
 }