Merge pull request #15 from myofficework000/repo-viewmode-testing

Added test case for repo view model

app/build.gradle.kts

@@ -103,6 +103,7 @@ dependencies {
     testImplementation(Dependencies.Test.kotlinxCoroutinesTest)
     testImplementation(Dependencies.Test.koinTest)
     testImplementation(Dependencies.Test.okHttp3MockWebServer)
+    testImplementation("org.junit.jupiter:junit-jupiter:5.8.1")
 
     // Android Test
     androidTestImplementation(Dependencies.AndroidTest.junit)

app/src/test/java/com/abhishek/pathak/kotlin/android/githubcompose/ui/feature/repos/ReposViewModelTest.kt

@@ -0,0 +1,77 @@
+package com.abhishek.pathak.kotlin.android.githubcompose.ui.feature.repos
+
+import com.abhishek.pathak.kotlin.android.githubcompose.data.GithubRepository
+import com.abhishek.pathak.kotlin.android.githubcompose.data.model.Repo
+import com.abhishek.pathak.kotlin.android.githubcompose.data.model.User
+import com.abhishek.pathak.kotlin.android.githubcompose.data.model.UserDetail
+import io.mockk.coEvery
+import io.mockk.mockk
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import kotlinx.coroutines.test.setMain
+import org.junit.Before
+import org.junit.Test
+import org.junit.jupiter.api.Assertions.*
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class ReposViewModelTest{
+    private val githubRepository = mockk<GithubRepository>()
+
+    @Before
+    fun setUp(){
+        Dispatchers.setMain(Dispatchers.Unconfined)
+    }
+    @Test
+    fun `when view model initialized then should emit initial view state first`() = runTest {
+        val expectedInitialViewState = ReposContract.State(
+            user = null,
+            reposList = emptyList(),
+            isUserLoading = true,
+            isReposLoading = true,
+            isError = false
+        )
+        val viewmodel = ReposViewModel("testUserId",githubRepository)
+        assertEquals(expectedInitialViewState,viewmodel.viewState.value)
+    }
+
+    @Test
+    fun `when fetchInitialData called then should emit user and repos state`() = runTest {
+        val userId = "testUserId"
+        val user = UserDetail(avatarUrl = "avatar_url", htmlUrl = "html_url")
+        val repos = listOf(Repo(id = 1, name = "Repo 1", description = "Description 1"))
+        val expectedViewState = ReposContract.State(
+            user = user,
+            reposList = repos,
+            isUserLoading = false,
+            isReposLoading = false,
+            isError = false
+        )
+        coEvery { githubRepository.getUser(userId) } returns Result.success(user)
+        coEvery { githubRepository.getRepos(userId) } returns Result.success(repos)
+
+        val viewmodel = ReposViewModel(userId,githubRepository)
+
+        assertEquals(expectedViewState,viewmodel.viewState.value)
+    }
+
+    @Test
+    fun `test state after repos retrieval failure`() = runTest {
+        val userId = "testUserId"
+        val user = UserDetail(avatarUrl = "avatar_url", htmlUrl = "html_url")
+        val expectedViewState = ReposContract.State(
+            user = user,
+            reposList = emptyList(),
+            isUserLoading = false,
+            isReposLoading = false,
+            isError = true
+        )
+
+        coEvery { githubRepository.getUser(userId) } returns Result.success(user)
+        coEvery { githubRepository.getRepos(userId) } returns Result.failure(Exception("Repos retrieval failed"))
+
+        val viewmodel = ReposViewModel(userId,githubRepository)
+
+        assertEquals(expectedViewState,viewmodel.viewState.value)
+    }
+}