ANDREAS_LATANOWSKY_CPD_1910877/test/widget_test.dart

import 'dart:io';
import 'package:cpd_app/session_list.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:cpd_app/main.dart';
import 'package:cpd_app/ocr_page.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:image_picker/image_picker.dart';

Future<Uint8List> loadImageBytesFromAssets(String imagePath) async {
  final ByteData data = await rootBundle.load(imagePath);
  return data.buffer.asUint8List();
}

void main() {
  setUpAll(() {
    HttpOverrides.global = null;
  });
  testWidgets('Check ocr UI', (WidgetTester tester) async {
    await tester.pumpWidget(const MyApp());

    final buttonsFinder = find.byType(ElevatedButton);

    expect(buttonsFinder, findsWidgets);
    await tester.tap(find.widgetWithText(ElevatedButton, "Image Tools"));
    await tester.pumpAndSettle();
    expect(find.text('OCR'), findsOneWidget);

    var ocrbtn = find.widgetWithText(ElevatedButton, "OCR");
    expect(ocrbtn, findsOneWidget);

    var imgtrans = find.widgetWithText(ElevatedButton, "Image Translation");
    expect(imgtrans, findsOneWidget);
    var prev = find.widgetWithText(ElevatedButton, "Previous Images");
    expect(prev, findsOneWidget);

    await tester.tap(find.widgetWithText(ElevatedButton, "OCR"));
    await tester.pumpAndSettle();

    expect(find.text('OCR'), findsOneWidget);
    expect(find.text('Select Image'), findsOneWidget);
    expect(find.widgetWithText(DropdownButton<String>, 'Auto'), findsOneWidget);
    await tester.tap(find.widgetWithText(DropdownButton<String>, 'Auto'));
    await tester.pumpAndSettle();
    expect(find.text('German'), findsOneWidget);
    expect(find.text('English'), findsOneWidget);
    expect(find.text('French'), findsOneWidget);
    expect(find.text('Russian'), findsOneWidget);
    await tester.tap(find.widgetWithText(DropdownMenuItem<String>, 'German'));
    await tester.tap(find.widgetWithText(ElevatedButton, "Select Image"));
    await tester.pump();

    final ocrFinder = find.byType(OCRPage);
    final ocrState = tester.state<OCRPageState>(ocrFinder);
    Uint8List bytes = await loadImageBytesFromAssets('assets/schild.png');

    ocrState.setState(() {
      var image = XFile.fromData(bytes);
      ocrState.selectedImage = image;
    });
    expect(ocrState.selectedImage, isNotNull);
    await tester.pumpAndSettle();

    expect(find.widgetWithText(ElevatedButton, "Extract Text"), findsOneWidget);
  });
  testWidgets('Check imageTranslateUI', (WidgetTester tester) async {
    await tester.pumpWidget(const MyApp());
    final buttonsFinder = find.byType(ElevatedButton);
    expect(buttonsFinder, findsWidgets);
    await tester.tap(find.widgetWithText(ElevatedButton, "Image Tools"));
    await tester.pumpAndSettle();
    expect(find.text('Image Translation'), findsOneWidget);
    var btn1 = find.widgetWithText(ElevatedButton, "Image Translation");
    expect(btn1, findsOneWidget);
    await tester.tap(btn1);
    await tester.pumpAndSettle();
    expect(find.text('Image Translation'), findsOneWidget);
    expect(
        find.widgetWithText(DropdownButton<String>, 'English'), findsOneWidget);
    await tester.tap(find.widgetWithText(DropdownButton<String>, 'English'));
    await tester.pumpAndSettle();
    expect(find.text('German'), findsExactly(2));
    expect(find.text('English'), findsExactly(2));
    expect(find.text('French'), findsExactly(1));
    expect(find.text('Russian'), findsExactly(1));
    await tester.pumpAndSettle();
    await tester.tap(find.widgetWithText(DropdownButton<String>, 'German'));
    expect(find.text('German'), findsExactly(2));
    expect(find.text('English'), findsExactly(2));
    expect(find.text('French'), findsExactly(1));
    expect(find.text('Russian'), findsExactly(1));
    //
  });

  testWidgets('Check listPreview', (WidgetTester tester) async {
    ImageList.addImage(
        "test1", await loadImageBytesFromAssets('assets/schild.png'));
    ImageList.addImage(
        "test2", await loadImageBytesFromAssets('assets/schild.png'));
    ImageList.addImage(
        "test3", await loadImageBytesFromAssets('assets/schild.png'));
    ImageList.addImage(
        "test3", await loadImageBytesFromAssets('assets/schild.png'));

    await tester.pumpWidget(const MyApp());

    final buttonsFinder = find.byType(ElevatedButton);
    expect(buttonsFinder, findsWidgets);

    await tester.tap(find.widgetWithText(ElevatedButton, "Image Tools"));
    await tester.pumpAndSettle();

    var btn1 = find.widgetWithText(ElevatedButton, "Previous Images");
    expect(btn1, findsOneWidget);
    await tester.tap(btn1);
    await tester.pumpAndSettle();
    expect(find.text('Image Gallery'), findsOneWidget);

    final gridViewFinder = find.byType(GridView);
    expect(gridViewFinder, findsOneWidget);

    const numberOfEntries = 4;
    expect(find.byType(GestureDetector), findsNWidgets(numberOfEntries));
  });
}