FLOW_USECASE.md

Testing a Flow UseCase

A test for a UseCase that returns a Flow needs a way to observe the items emitted by Flow.

In order to observe those results, we launch inside coroutinesTestRule.testDispatcher.runBlockingTest block and make use of FlowAssert for the verifications.

FlowAssert is a helper class created by Square's Engineering team for usage in SQLDelight, so all copyrights belong to them.

More info about FlowAssert here:

• https://github.com/cashapp/sqldelight/blob/master/extensions/coroutines-extensions/src/commonTest/kotlin/com/squareup/sqldelight/runtime/coroutines/FlowAssert.kt
• https://proandroiddev.com/kotlin-flow-assert-ff45465c01c0