Kotlin Multiplatform Academy · Lesson

Test suspend Functions & Flows

Use runTest and Turbine to assert async behavior.

Async Needs Special Tests

Suspend functions and Flows do not finish instantly, so you need tools that wait for async work before asserting. ⏳

Wrap async assertions in runTest from the coroutines-test library; it provides a scope and skips virtual delays automatically.

@Test
fun loadsUser() = runTest {
    val u = repo.load(1)
    assertEquals("Sam", u.name)
}