Adding TestFairy to your flutter project

If you are developing your app in flutter here are the instructions to add the TestFairy sdk.


Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  testfairy: any

2. Install it

You can install packages from the command line:
with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:testfairy/testfairy.dart';

Quick Start

Include the library and run your main app like this.

Make sure your project is AndroidX compatible.

Minimum supported iOS target is 9.0.

// inside your main.dart
import 'dart:async';
import 'dart:io';
import 'package:testfairy/testfairy.dart';

void main() { = TestFairy.httpOverrides();

    () async {
      try {
        FlutterError.onError =
            (details) => TestFairy.logError(details.exception);

        // Call `await TestFairy.begin()` or any other setup code here.

      } catch (error) {
    (e, s) {
    zoneSpecification: new ZoneSpecification(
      print: (self, parent, zone, message) {

How to update native SDKs?

This is done automatically for Android.

If you need to update the native iOS SDK used by your current integration, run pod repo update; pod install in your ios directory.


  • I have my own setup. How can I make it work with TestFairy?

Copy this file to your project. Add the necessary functionality and assign to an instance from your new implementation.

  • I see Errno::ENOENT - No such file or directory @ rb_sysopen - ./ios/Pods/Local Podspecs/testfairy.podspec.json when I build an iOS app.

This happens due to a pod misconfiguration bug on the Flutter side. We have blog post explaining the issue if you are interested.

Clean your project, remove ios/Podfile and Xcode workspace file entirely. (make sure you have backups just in case)

flutter clean
rm -rf ios/Podfile ios/Podfile.lock pubspec.lock ios/Pods ios/Runner.xcworkspace

Revert to cocoapods 1.7.5 temporarily.

gem uninstall cocoapods
gem install cocoapods -v 1.7.5

Add the following line to the beginning of your iOS project's generated Podfile.

# Beginning of file

# The rest of the file contents
# ...

Install pods.

pod repo update
cd ios
pod install
cd ..

Retry your build.

Once your build is successful, you can update cocoapods back to its latest version.

  • I see Looks like TestFairy has an upgrade to do... 1.X.Y+hotfixZ is the latest stable branch or errors related to Jetifier in the logs when I call an SDK method. --> Migrate your Android project to AndroidX by following this guide.

  • I see Undefined symbols for architecture error during compilation. --> You must use frameworks and specify a platform version of at least 9.0 in your generated iOS project's Podfile. Please make the following changes in ios/Podfile and rebuild:

    target 'Runner' do
    platform :ios, '9.0'   ####### <--- add this and specify at least 9.0
    use_frameworks!        ####### <--- add this, and try building if there is 
                           #######      no Swift code or plugin in the project.
                           #######      If there is Swift code, please also add 
                           #######      the marked line below
    post_install do |installer|
    installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
       config.build_settings['ENABLE_BITCODE'] = 'NO'
        config.build_settings['SWIFT_VERSION'] = '3.2'  ### <--- add this, change the 
                                                        ### version to what's being
                                                        ### used in the project, 
                                                        ### remove if there is none
  • CocoaPods could not find compatible versions for pod "TestFairy".

    This is an old bug in the plugin pubspec file.

    • First, run flutter clean in your root directory.

    • Please move ios/Podfile.lock into a temporary place before running pod repo update; pod install in your ios directory.

    • If some of the libraries you use need to be at specific versions, copy the necessary lines from your backed up Podfile.lock into the newly created one. Please keep the lines related to TestFairy (note the title case in the name) untouched.

    • Finally, run pod repo update; pod install again to re-download libraries from the replaced lines.

    If everything went smoothly, this issue should never happen again.

  • There are syntax errors in or TestFairyFlutterPlugin.m file.

    In your project root, run flutter clean; cd ios; pod repo update; pod install; cd .. and test again

API Reference

You can find a detailed documentation of the latest Dart interface here.

Last updated on 2020-07-21