Add RecipeViewModel tests

app/build.gradle.kts

@@ -122,6 +122,7 @@ dependencies {
     testImplementation(libs.robolectric)
 
     testImplementation(libs.androidx.test.junit)
+    testImplementation(libs.androidx.coreTesting)
 
     testImplementation(libs.google.truth)
 

app/src/test/java/gq/kirmanak/mealient/ui/recipes/RecipeViewModelTest.kt

@@ -0,0 +1,75 @@
+package gq.kirmanak.mealient.ui.recipes
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.google.common.truth.Truth.assertThat
+import gq.kirmanak.mealient.data.auth.AuthRepo
+import gq.kirmanak.mealient.data.recipes.RecipeRepo
+import gq.kirmanak.mealient.logging.Logger
+import gq.kirmanak.mealient.test.FakeLogger
+import io.mockk.MockKAnnotations
+import io.mockk.every
+import io.mockk.impl.annotations.MockK
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.test.UnconfinedTestDispatcher
+import kotlinx.coroutines.test.resetMain
+import kotlinx.coroutines.test.setMain
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class RecipeViewModelTest {
+
+    @MockK
+    lateinit var authRepo: AuthRepo
+
+    @MockK(relaxed = true)
+    lateinit var recipeRepo: RecipeRepo
+
+    private val logger: Logger = FakeLogger()
+
+    @get:Rule
+    val instantExecutorRule = InstantTaskExecutorRule()
+
+    @Before
+    fun setUp() {
+        MockKAnnotations.init(this)
+        Dispatchers.setMain(UnconfinedTestDispatcher())
+    }
+
+    @After
+    fun tearDown() {
+        Dispatchers.resetMain()
+    }
+
+    @Test
+    fun `when authRepo isAuthorized changes to true expect isAuthorized update`() {
+        every { authRepo.isAuthorizedFlow } returns flowOf(false, true)
+        assertThat(createSubject().isAuthorized.value).isTrue()
+    }
+
+    @Test
+    fun `when authRepo isAuthorized changes to false expect isAuthorized update`() {
+        every { authRepo.isAuthorizedFlow } returns flowOf(true, false)
+        assertThat(createSubject().isAuthorized.value).isFalse()
+    }
+
+    @Test
+    fun `when authRepo isAuthorized doesn't change expect isAuthorized null`() {
+        every { authRepo.isAuthorizedFlow } returns flowOf(true)
+        assertThat(createSubject().isAuthorized.value).isNull()
+    }
+
+    @Test
+    fun `when isAuthorization change is handled expect isAuthorized null`() {
+        every { authRepo.isAuthorizedFlow } returns flowOf(true, false)
+        val subject = createSubject()
+        subject.onAuthorizationChangeHandled()
+        assertThat(subject.isAuthorized.value).isNull()
+    }
+
+    private fun createSubject() = RecipeViewModel(recipeRepo, authRepo, logger)
+}