Cross-platform applications require testing of the UI with several devices and OS platforms. So, the testing and development team will have to sit together and take the necessary steps along the way. When it comes to testing the UI of Flutter-based apps, then it has several features like unit testing, integration testing, and widget testing.

According to the hierarchy, integration testing is initiated first in which multiple modules are examined along with their integration. With the Flutter app development, this type of testing is equivalent to that of overall UI testing.

Before we move further with more testing methods, let’s get a clear vision of the purpose for which UI modules are tested.

Purpose of UI Testing

The reason for UI testing is to impersonate the experience of genuine users. UI tests perform activities on applications as a genuine client would and spread different client ventures. UI testing can discover bugs that can’t be found during lower levels of testing, for example, unit testing or reconciliation testing.

Be that as it may, there are sure things you should remember about UI tests:

  • UI tests are hard and costly to compose
  • UI tests are weak and difficult to keep up
  • UI tests experience various layers, such as systems administration, database, and API, which cause flakiness.
  • UI testing requires various aptitudes and outlooks. Designers normally consider UI tests as a unit or mix test, which is inaccurate.
  • UI tests require consistent support, there is no way to avoid this. The tests are composed of the present condition of your application.

Right now, there are apparatuses like Appium, XCUITest, and Expresso accessible available to play out the UI testing of versatile applications. You can peruse a correlation of these devices here as to various criteria.

Writing the UI Test

When you have an instrumented application, you can compose UI tests utilizing the Flutter Driver bundle. With respect to the Flutter documentation on composing UI tests, there are four stages. The application checks the number of snaps on the in addition to fasten. Along these lines, the test includes the accompanying stages:

  • Interface the App to the gadget in the arrangement
  • Detach the application in the teardown strategy
  • Use ‘SerializableFinder’ to discover the gadget
  • Use hope to state the message

While conveying these tests, a mobile app development company should establish the objectives to have a better outcome.

Current Limitation

In spite of the fact that Flutter UI testing is an amazing element for testing applications like a genuine client, there are a few confinements to UI testing right now:

  • UI tests set aside a great deal of effort to execute as they include interfacing with the neighborhood server and re-fabricating the application.
  • UI tests aren’t upheld by any genuine gadget testing suppliers, similar to Firebase Test Labs, Sauce Labs, Amazon Device Farm or Bitbar. Despite everything, they don’t acknowledge Flutter testing packs as a contribution to executing the test on genuine gadgets.
  • Replicating UI tests isn’t as simple as unit and gadget tests. Flutter UI tests run in a different procedure from the fundamental application, so testers need additional efforts to run this procedure.
  • UI testing requires information on Dart, so it is extremely trying for robotization designers to learn Dart and use Flutter Driver to empower UI testing.



Testing an app requires patience and consistency. Once the app development tasks are completed, the game is all about testing and deployment of the app. Flutter is a fully-functional framework, offering the leverage to run several tests. Before the app development company go further to the deployment, utilize this guide well to overcome challenges of the app’s performance.