Mocking with Mockk | Agent Skills Atlas

About this skill

Use this skill to wire MockK (the Kotlin-first mocking framework) into a JVM unit-test suite, especially when coroutines, singleton/object mocking, or constructor mocking dominate. Covers io.mockk:mockk-jvm:1.14.x (and mockk-android + mockk-agent for instrumented), every { } returns, coEvery / coVerify (native suspend support — the big win over Mockito), mockk(relaxed = true) / relaxUnitFun = true, slot () capture, verifySequence / verifyOrder / confirmVerified, mockkStatic / mockkObject / mockkConstructor with unmockkAll() cleanup, @MockK / @RelaxedMockK / @SpyK / @InjectMockKs annotations, and the Mockito-vs-MockK decision criteria. Use when the user mentions coEvery, mockkObject, mockkStatic, slot, MockKException, every returns vs coEvery, relaxed = true, or asks how to mock a Kotlin object/singleton.

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0 potential findings · Scanned 11/4/2026 · Scanner 0.2.1

Content SHA-256: b01e860ae2f57507911efaf8c48b6a7988a6f2174c2695ae5f7ec4ba720d5a78

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Original listing metadata

Original name

mocking-with-mockk

Original description

Use this skill to wire MockK (the Kotlin-first mocking framework) into a JVM unit-test suite, especially when coroutines, singleton/`object` mocking, or constructor mocking dominate. Covers `io.mockk:mockk-jvm:1.14.x` (and `mockk-android` + `mockk-agent` for instrumented), `every { } returns`, `coEvery` / `coVerify` (native suspend support — the big win over Mockito), `mockk(relaxed = true)` / `relaxUnitFun = true`, `slot<T>()` capture, `verifySequence` / `verifyOrder` / `confirmVerified`, `mockkStatic` / `mockkObject` / `mockkConstructor` with `unmockkAll()` cleanup, `@MockK` / `@RelaxedMockK` / `@SpyK` / `@InjectMockKs` annotations, and the Mockito-vs-MockK decision criteria. Use when the user mentions `coEvery`, `mockkObject`, `mockkStatic`, `slot`, `MockKException`, `every returns vs coEvery`, `relaxed = true`, or asks how to mock a Kotlin `object`/singleton.

About this listing

Category: Engineering
Reported license: Apache-2.0
Listing language (estimated): English
Review status: Not individually reviewed
Agent compatibility: Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.