Basic text input test for QuillEditor widget

test/widget_tester_extension.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_quill/src/widgets/editor.dart';
+import 'package:flutter_quill/src/widgets/raw_editor.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+extension QuillEnterText on WidgetTester {
+  /// Give the QuillEditor widget specified by [finder] the focus.
+  Future<void> quillGiveFocus(Finder finder) {
+    return TestAsyncUtils.guard(() async {
+      final editor = state<QuillEditorState>(
+        find.descendant(
+            of: finder,
+            matching:
+                find.byType(QuillEditor, skipOffstage: finder.skipOffstage),
+            matchRoot: true),
+      );
+      editor.widget.focusNode.requestFocus();
+      await pump();
+      expect(editor.widget.focusNode.hasFocus, isTrue);
+    });
+  }
+
+  /// Give the QuillEditor widget specified by [finder] the focus and update its
+  /// editing value with [text], as if it had been provided by the onscreen
+  /// keyboard.
+  ///
+  /// The widget specified by [finder] must be a [QuillEditor] or have a
+  /// [QuillEditor] descendant. For example `find.byType(QuillEditor)`.
+  Future<void> quillEnterText(Finder finder, String text) async {
+    return TestAsyncUtils.guard(() async {
+      await quillGiveFocus(finder);
+      await updateEditingValue(finder, text);
+      await idle();
+    });
+  }
+
+  Future<void> updateEditingValue(Finder finder, String text) async {
+    return TestAsyncUtils.guard(() async {
+      final editor = state<RawEditorState>(
+        find.descendant(
+            of: finder,
+            matching: find.byType(RawEditor, skipOffstage: finder.skipOffstage),
+            matchRoot: true),
+      );
+      testTextInput.updateEditingValue(TextEditingValue(
+          text: text,
+          selection: TextSelection.collapsed(
+              offset: editor.textEditingValue.text.length)));
+      await idle();
+    });
+  }
+}

test/widgets/editor_test.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_quill/src/widgets/controller.dart';
+import 'package:flutter_quill/src/widgets/editor.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import '../widget_tester_extension.dart';
+
+void main() {
+  late QuillController controller;
+
+  setUp(() {
+    controller = QuillController.basic();
+  });
+
+  tearDown(() {
+    controller.dispose();
+  });
+
+  group('QuillEditor', () {
+    testWidgets('Keyboard entered text is stored in document', (tester) async {
+      await tester.pumpWidget(
+        MaterialApp(
+          home: QuillEditor.basic(controller: controller, readOnly: false),
+        ),
+      );
+      await tester.quillEnterText(find.byType(QuillEditor), 'test\n');
+
+      expect(controller.document.toPlainText(), 'test\n');
+    });
+  });
+}