flutter_profile/test/profile_test.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:profile/profile.dart';

import 'test_classes/test_profile_data.dart';
import 'test_classes/test_profile_service.dart';

void main() {
  testWidgets('Profile page with preset values', (tester) async {
    await tester.pumpWidget(
      MaterialApp(
        home: Material(
          child: ProfilePage(
            user: User(
              'Firstname',
              'Lastname',
              Uint8List.fromList([]),
              TestProfileData(email: 'test@email.com'),
            ),
            service: TestProfileService(),
          ),
        ),
      ),
    );

    final firstNameFinder = find.text('Firstname');
    final lastNameFinder = find.text('Lastname');
    final emailFinder = find.text('test@email.com');

    expect(firstNameFinder, findsOneWidget);
    expect(lastNameFinder, findsOneWidget);
    expect(emailFinder, findsOneWidget);
  });

  testWidgets('Profile page without preset value', (tester) async {
    await tester.pumpWidget(
      MaterialApp(
        home: Material(
          child: ProfilePage(
            user: User(
              null,
              null,
              null,
              TestProfileData(email: null),
            ),
            service: TestProfileService(),
          ),
        ),
      ),
    );
  });

  testWidgets('Profile page with preset value and changing them',
      (tester) async {
    await tester.pumpWidget(
      MaterialApp(
        home: Material(
          child: ProfilePage(
            user: User(
              'Firstname',
              'Lastname',
              null,
              TestProfileData(email: 'test@email.com'),
            ),
            service: TestProfileService(),
          ),
        ),
      ),
    );

    await tester.enterText(find.text('Firstname'), 'FirstEditedName');
    await tester.testTextInput.receiveAction(TextInputAction.send);
    await tester.pump();

    await tester.enterText(find.text('test@email.com'), 'edited@emial.com');
    await tester.testTextInput.receiveAction(TextInputAction.send);
    await tester.pump();

    final firstNameFinder = find.text('Firstname');
    final firstNameEditedFinder = find.text('FirstEditedName');

    final lastNameFinder = find.text('Lastname');

    final emailFinder = find.text('test@email.com');
    final emailEditedFinder = find.text('edited@emial.com');

    expect(firstNameFinder, findsNothing);
    expect(firstNameEditedFinder, findsOneWidget);
    expect(lastNameFinder, findsOneWidget);
    expect(emailFinder, findsNothing);
    expect(emailEditedFinder, findsOneWidget);
  });
}