I would like to write some tests for an operator w...

# coroutines

[Andrew Ebling]

I would like to write some tests for an operator which filters button press events (see thread from yesterday). To get some inspiration for the right approach, I’ve been looking at some of the existing Kotlin Coroutine tests e.g. kotlinx.coroutines/kotlinx-coroutines-core/common/test/TestBase.common.kt.

Is it possible to re-use TestBase() my own tests? I’ve tried import kotlin.test.* however this package is not found, despite having the following in my Android app `build.gradle`:

implementation ‘org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3’

I’ve also tried adding a testImplementation line with the same, but the above import still fails.

Is re-using TestBase() etc. in my code not possible? Or is their a separate testImplementation entry I should add to my app build.gradle?

[ephemient]

with the default Gradle setup, only the main sourceset is exposed, the test sourceset remains internal to that project. tl;dr no, you can't use it by dependency

[Andrew Ebling]

OK thanks - that’s what I feared. It’s a shame, because a lot of effort has been invested in writing the infrastructure to support good testing and it should be easy to write tests for new operators that you write yourself

[Andrew Ebling]

to answer my own question: https://github.com/cashapp/turbine does the job nicely - by Jake Wharton, no less!