kotlin-testing

name	kotlin-testing
description	Kotlin testing - JUnit 5, MockK, Kotest, coroutine testing
version	1.0.0
sasmp_version	1.3.0
bonded_agent	06-kotlin-testing
bond_type	PRIMARY_BOND
execution	{"timeout_ms":30000,"retry":{"max_attempts":3,"backoff":"exponential","initial_delay_ms":1000}}
parameters	{"required":[{"name":"framework","type":"string","validation":"^(junit|mockk|kotest|coroutines|compose)$"}],"optional":[{"name":"style","type":"string","default":"given_when_then"}]}
logging	{"level":"info","events":["skill_invoked","framework_loaded","error_occurred"]}

Kotlin Testing Skill

Comprehensive testing with JUnit 5, MockK, and coroutine testing.

Topics Covered

MockK

class UserServiceTest {
    private val repository: UserRepository = mockk()
    private val service = UserService(repository)

    @Test
    fun `createUser saves and returns`() {
        every { repository.save(any()) } returns User(1, "[e-mail]")

        val result = service.create(CreateUserRequest("[e-mail]"))

        assertThat(result.id).isEqualTo(1)
        verify(exactly = 1) { repository.save(any()) }
    }
}

Coroutine Testing

@Test
fun `loadUser emits states`() = runTest {
    coEvery { repository.getUser(1) } returns Result.success(user)

    viewModel.state.test {
        viewModel.load(1)
        assertThat(awaitItem().isLoading).isTrue()
        advanceUntilIdle()
        assertThat(awaitItem().user).isEqualTo(user)
    }
}

Compose Testing

@Test
fun `button enabled when fields filled`() {
    composeTestRule.setContent { LoginScreen() }
    composeTestRule.onNodeWithTag("email").performTextInput("[e-mail]")
    composeTestRule.onNodeWithTag("password").performTextInput("pass")
    composeTestRule.onNodeWithTag("login_button").assertIsEnabled()
}

Troubleshooting

Issue	Resolution