flutter-quill/test/widgets/editor_test.dart

import 'dart:convert' show jsonDecode;

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_quill/flutter_quill.dart';
import 'package:flutter_quill/flutter_quill_test.dart';
import 'package:flutter_test/flutter_test.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');
    });

    testWidgets('insertContent is handled correctly', (tester) async {
      String? latestUri;
      await tester.pumpWidget(
        MaterialApp(
          home: QuillEditor(
            controller: controller,
            focusNode: FocusNode(),
            scrollController: ScrollController(),
            scrollable: true,
            padding: const EdgeInsets.all(0),
            autoFocus: true,
            readOnly: false,
            expands: true,
            contentInsertionConfiguration: ContentInsertionConfiguration(
              onContentInserted: (content) {
                latestUri = content.uri;
              },
              allowedMimeTypes: const <String>['image/gif'],
            ),
          ),
        ),
      );
      await tester.tap(find.byType(QuillEditor));
      await tester.quillEnterText(find.byType(QuillEditor), 'test\n');
      await tester.idle();

      const uri =
          'content://com.google.android.inputmethod.latin.fileprovider/test.gif';
      final messageBytes =
          const JSONMessageCodec().encodeMessage(<String, dynamic>{
        'args': <dynamic>[
          -1,
          'TextInputAction.commitContent',
          jsonDecode(
              '{"mimeType": "image/gif", "data": [0,1,0,1,0,1,0,0,0], "uri": "$uri"}'),
        ],
        'method': 'TextInputClient.performAction',
      });

      Object? error;
      try {
        await tester.binding.defaultBinaryMessenger
            .handlePlatformMessage('flutter/textinput', messageBytes, (_) {});
      } catch (e) {
        error = e;
      }
      expect(error, isNull);
      expect(latestUri, equals(uri));
    });
  });
}