flutter_bdd

Sample Project for Flutter + flutter_gherkin demo

The sample project is based on following instruction:

• Flutter Developer Library: Hello World / Navigate to a new screen and back

• flutter_gherkin sample: Flutter-Ghkerin Lib

Requirements

• Flutter v2.0.1
• flutter_gherkin
• Xcode 12.2
• Android Studio 3.1.4

flutter_gherkin Installation:

Setup flutter_gherkin into pubspec.yaml dependencies:

dependencies:
    flutter_gherkin: ^1.1.9

Adding a package dependency to an app:

# Install
$ flutter pub get

Execution Test:

Execute target to iOS / Android:

• Use flutter devices to get target device id

# run flutter devices
$ flutter devices

• Config targetDeviceId in app_test.dart

Ex: (Android), default empty string
..targetDeviceId = "emulator-5554"

• Execute command line with target devices

# execute command line
$ dart test_driver/app_test.dart

or 

$ flutter drive --target=test_driver/app.dart

Useful Sample:

• Page Object Patterns

class LandingPage extends BasePage {

  final landingPageTitle = 'firstTabTitle';

  LandingPage(FlutterDriver driver) : super(driver) {
    final locator = super.finElementByKey(landingPageTitle);
    BasePage.waitFor(driver, locator);
  }

  Future<void> doSomething(FlutterWorld world) async {
    // doSomehting

  }
}

• Step Definition

import '../pages/landing_page.dart';

class TapButtonNTimesStep extends When2WithWorld<String, int, FlutterWorld> {
  TapButtonNTimesStep()
      : super(StepDefinitionConfiguration()..timeout = Duration(seconds: 30));

  @override
  Future<void> executeStep(String key, int times) async {
    final landingPage = new LandingPage(world.driver);
    await landingPage.tapPlusOneBtnForNTimes(key, times, world);
  }

  @override
  RegExp get pattern => RegExp(r"I tap the {string} button {int} times");
}

• Test Report

1. Install npm package cucumber-html-reporter

# Install cucumber-html-reporter
$ npm install cucumber-html-reporter

2. Display Report

# Go to report folder
$ cd report

# Display Report
$ node index.js

Documentation:

Blog: - Gherkin with Flutter

Author

Jersey Su – @jerseysu