mock common tests in kotlin using multiplatform

I can't use the common mock library ( mockk.io ), with kotlin multiplatform. In their website it says that to use mockk in kotlin multiplatform you just need to add this line to your gradle. testImplementation "io.mockk:mockk-common:{version}"

I added it and it builds normally, only when I want to use it is when it fails. Giving

Unresolved reference: io Unresolved reference: mockk 

my gradle file

 kotlin { val hostOs = System.getProperty("os.name") val isMingwX64 = hostOs.startsWith("Windows") val nativeTarget = when { hostOs == "Mac OS X" -> macosX64("native") hostOs == "Linux" -> linuxX64("native") isMingwX64 -> mingwX64("native") else -> throw GradleException("Host OS is not supported in Kotlin/Native.") } nativeTarget.apply { binaries { executable { entryPoint = "main" } } } sourceSets { val nativeMain by getting val nativeTest by getting val commonTest by getting { dependencies { implementation(kotlin("test-common")) implementation(kotlin("test-annotations-common")) implementation("io.mockk:mockk-common:1.10.4") } } } } 

2 Answers

Unless something has changed, mockk does not work on Kotlin Native.

You can use Mockative to mock interfaces in Kotlin/Native and Kotlin Multiplatform, not unlike how you'd mock dependencies using MockK or Mockito.

Full disclosure: I am one of the authors of Mockative

Here's an example:

class GitHubServiceTests { @Mock val api = mock(classOf<GitHubAPI>()) val service = GitHubService(api) @Test fun test() { // Given val id = "mockative/mockative" val mockative = Repository(id = id, name = "Mockative") given(api).invocation { fetchRepository(id) } .thenReturn(mockative) // When val repository = service.getRepository(id) // Then assertEquals(mockative, repository) // You can also verify function calls on mocks verify(api).invocation { fetchRepository(id) } .wasInvoked(exactly = once) } }