What is the role of TestDispatcher and runTest in coroutine testing?
This tests coroutine test infrastructure and virtual time control. A great answer says runTest installs a TestDispatcher and TestScope, skips delays automatically, and exposes advanceTimeBy to test timeouts instantly.
This tests deep knowledge of kotlinx-coroutines-test and deterministic concurrency. A strong answer explains that runTest creates a TestScope with a TestDispatcher, replaces the main dispatcher, automatically skips delay calls, and provides advanceTimeBy and advanceUntilIdle to manipulate virtual time. Mention UnconfinedTestDispatcher for immediate execution and StandardTestDispatcher for queued, controllable execution.
Read the original → developer.android.com
- #kotlin
- #coroutines
- #testing
- #android
- #concurrency
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