| // 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:html' as html; |
| import 'dart:typed_data'; |
| import 'dart:ui'; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:image_picker_for_web/src/image_resizer.dart'; |
| import 'package:image_picker_platform_interface/image_picker_platform_interface.dart'; |
| import 'package:integration_test/integration_test.dart'; |
| |
| //This is a sample 10x10 png image |
| final String pngFileBase64Contents = |
| "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKAQMAAAC3/F3+AAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAABlBMVEXqQzX+/v6lfubTAAAAAWJLR0QB/wIt3gAAAAlwSFlzAAAHEwAABxMBziAPCAAAAAd0SU1FB+UJHgsdDM0ErZoAAAALSURBVAjXY2DABwAAHgABboVHMgAAACV0RVh0ZGF0ZTpjcmVhdGUAMjAyMS0wOS0zMFQxMToyOToxMi0wNDowMHCDC24AAAAldEVYdGRhdGU6bW9kaWZ5ADIwMjEtMDktMzBUMTE6Mjk6MTItMDQ6MDAB3rPSAAAAAElFTkSuQmCC"; |
| |
| void main() { |
| IntegrationTestWidgetsFlutterBinding.ensureInitialized(); |
| |
| // Under test... |
| late ImageResizer imageResizer; |
| late XFile pngFile; |
| setUp(() { |
| imageResizer = ImageResizer(); |
| final pngHtmlFile = _base64ToFile(pngFileBase64Contents, "pngImage.png"); |
| pngFile = XFile(html.Url.createObjectUrl(pngHtmlFile), |
| name: pngHtmlFile.name, mimeType: pngHtmlFile.type); |
| }); |
| |
| testWidgets("image is loaded correctly ", (WidgetTester tester) async { |
| final imageElement = await imageResizer.loadImage(pngFile.path); |
| expect(imageElement.width!, 10); |
| expect(imageElement.height!, 10); |
| }); |
| |
| testWidgets( |
| "canvas is loaded with image's width and height when max width and max height are null", |
| (widgetTester) async { |
| final imageElement = await imageResizer.loadImage(pngFile.path); |
| final canvas = imageResizer.resizeImageElement(imageElement, null, null); |
| expect(canvas.width, imageElement.width); |
| expect(canvas.height, imageElement.height); |
| }); |
| |
| testWidgets( |
| "canvas size is scaled when max width and max height are not null", |
| (widgetTester) async { |
| final imageElement = await imageResizer.loadImage(pngFile.path); |
| final canvas = imageResizer.resizeImageElement(imageElement, 8, 8); |
| expect(canvas.width, 8); |
| expect(canvas.height, 8); |
| }); |
| |
| testWidgets("resized image is returned after converting canvas to file", |
| (widgetTester) async { |
| final imageElement = await imageResizer.loadImage(pngFile.path); |
| final canvas = imageResizer.resizeImageElement(imageElement, null, null); |
| final resizedImage = |
| await imageResizer.writeCanvasToFile(pngFile, canvas, null); |
| expect(resizedImage.name, "scaled_${pngFile.name}"); |
| }); |
| |
| testWidgets("image is scaled when maxWidth is set", |
| (WidgetTester tester) async { |
| final scaledImage = |
| await imageResizer.resizeImageIfNeeded(pngFile, 5, null, null); |
| expect(scaledImage.name, "scaled_${pngFile.name}"); |
| final scaledImageSize = await _getImageSize(scaledImage); |
| expect(scaledImageSize, Size(5, 5)); |
| }); |
| |
| testWidgets("image is scaled when maxHeight is set", |
| (WidgetTester tester) async { |
| final scaledImage = |
| await imageResizer.resizeImageIfNeeded(pngFile, null, 6, null); |
| expect(scaledImage.name, "scaled_${pngFile.name}"); |
| final scaledImageSize = await _getImageSize(scaledImage); |
| expect(scaledImageSize, Size(6, 6)); |
| }); |
| |
| testWidgets("image is scaled when imageQuality is set", |
| (WidgetTester tester) async { |
| final scaledImage = |
| await imageResizer.resizeImageIfNeeded(pngFile, null, null, 89); |
| expect(scaledImage.name, "scaled_${pngFile.name}"); |
| }); |
| |
| testWidgets("image is scaled when maxWidth,maxHeight,imageQuality are set", |
| (WidgetTester tester) async { |
| final scaledImage = |
| await imageResizer.resizeImageIfNeeded(pngFile, 3, 4, 89); |
| expect(scaledImage.name, "scaled_${pngFile.name}"); |
| }); |
| |
| testWidgets("image is not scaled when maxWidth,maxHeight, is set", |
| (WidgetTester tester) async { |
| final scaledImage = |
| await imageResizer.resizeImageIfNeeded(pngFile, null, null, null); |
| expect(scaledImage.name, pngFile.name); |
| }); |
| } |
| |
| Future<Size> _getImageSize(XFile file) async { |
| final completer = Completer<Size>(); |
| final image = html.ImageElement(src: file.path); |
| image.onLoad.listen((event) { |
| completer.complete(Size(image.width!.toDouble(), image.height!.toDouble())); |
| }); |
| image.onError.listen((event) { |
| completer.complete(Size(0, 0)); |
| }); |
| return completer.future; |
| } |
| |
| html.File _base64ToFile(String data, String fileName) { |
| var arr = data.split(','); |
| var bstr = html.window.atob(arr[1]); |
| var n = bstr.length, u8arr = Uint8List(n); |
| |
| while (n >= 1) { |
| u8arr[n - 1] = bstr.codeUnitAt(n - 1); |
| n--; |
| } |
| |
| return html.File([u8arr], fileName); |
| } |