lib/web_ui/test/ui/utils.dart

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';
import 'dart:js_interop';

import 'package:test/test.dart';
import 'package:ui/src/engine.dart';
import 'package:ui/src/engine/skwasm/skwasm_stub.dart' if (dart.library.ffi) 'package:ui/src/engine/skwasm/skwasm_impl.dart';
import 'package:ui/ui.dart';

/// Initializes the renderer for this test.
void setUpUiTest() {
  setUpAll(() async {
    debugEmulateFlutterTesterEnvironment = true;
    await webOnlyInitializePlatform();
    await renderer.fontCollection.debugDownloadTestFonts();
    renderer.fontCollection.registerDownloadedFonts();

  });
}

/// Draws the [Picture]. This is in preparation for a golden test.
Future<void> drawPictureUsingCurrentRenderer(Picture picture) async {
  final SceneBuilder sb = SceneBuilder();
  sb.pushOffset(0, 0);
  sb.addPicture(Offset.zero, picture);
  await renderer.renderScene(sb.build());
  await awaitNextFrame();
}

Future<void> awaitNextFrame() {
  final Completer<void> completer = Completer<void>();
  domWindow.requestAnimationFrame((JSNumber time) => completer.complete());
  return completer.future;
}

/// Returns [true] if this test is running in the CanvasKit renderer.
bool get isCanvasKit => renderer is CanvasKitRenderer;

/// Returns [true] if this test is running in the HTML renderer.
bool get isHtml => renderer is HtmlRenderer;

bool get isSkwasm => renderer is SkwasmRenderer;