Testing Flows with Turbine

In this section, we will learn how to test Flows using Turbine, which is a third-party library that we can use to test flows in our project.

Hot flows such as SharedFlow and StateFlow, as you learned in the previous chapter, emit values even if there are no listeners. They also keep emitting values and do not complete. Testing them is a bit more complicated. You won’t be able to convert these flows to a list and then compare it to the expected values.

To test hot flows and make testing other Flows easier, you can use a library from Cash App called Turbine (https://github.com/cashapp/turbine). Turbine is a small testing library for Kotlin Flow that you can use in Android.

You can use the Turbine testing library in your Android project by adding the following to your app/build.gradle dependencies:

dependencies {

    …

    testImplementation 'app.cash.turbine:turbine:0.8.0'

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