Unit test for the searchUser method in the ViewModel class, utilizing the MockKMP for verification. The test ensures that when a mock username is provided, the method returns a non-empty list with the user. Mock objects and assertions are used to validate the expected behavior.

GitHubUserListViewModelTests.kt

@Test
    fun `given mock username when searchUser called then returns non-emptyList with the user`() = runTest {
        // Given
        val userName = MockData.userName
        everySuspending { action.searchUser(isAny()) } returns Unit
        every { store.getUsers() } returns flowOf(listOf(MockData.user))
        every { store.isFetchingFinished() } returns flowOf(true)

        // When
        viewModel.searchUser(userName)

        // Then
        val result = viewModel.state.first()

        assertEquals(userName, result.data.first().login)

        verifyWithSuspend {
            viewModel.searchUser(isAny())
            viewModel.setState(isAny())
        }
    }