Add paging factory tests

app/src/test/java/gq/kirmanak/mealient/data/recipes/impl/RecipePagingSourceFactoryImplTest.kt

@@ -0,0 +1,63 @@
+package gq.kirmanak.mealient.data.recipes.impl
+
+import androidx.paging.PagingSource
+import com.google.common.truth.Truth.assertThat
+import dagger.hilt.android.testing.HiltAndroidTest
+import gq.kirmanak.mealient.data.recipes.db.RecipeStorage
+import gq.kirmanak.mealient.database.recipe.entity.RecipeSummaryEntity
+import gq.kirmanak.mealient.test.HiltRobolectricTest
+import gq.kirmanak.mealient.test.RecipeImplTestData.CAKE_RECIPE_SUMMARY_ENTITY
+import gq.kirmanak.mealient.test.RecipeImplTestData.PORRIDGE_RECIPE_SUMMARY_ENTITY
+import gq.kirmanak.mealient.test.RecipeImplTestData.TEST_RECIPE_SUMMARIES
+import gq.kirmanak.mealient.test.RecipeImplTestData.TEST_RECIPE_SUMMARY_ENTITIES
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+@OptIn(ExperimentalCoroutinesApi::class)
+class RecipePagingSourceFactoryImplTest : HiltRobolectricTest() {
+
+    @Inject
+    lateinit var subject: RecipePagingSourceFactory
+
+    @Inject
+    lateinit var storage: RecipeStorage
+
+    @Test
+    fun `when query is ca expect cake only is returned`() = runTest {
+        storage.saveRecipes(TEST_RECIPE_SUMMARIES)
+        subject.setQuery("ca")
+        assertThat(queryRecipes()).isEqualTo(listOf(CAKE_RECIPE_SUMMARY_ENTITY))
+    }
+
+    @Test
+    fun `when query is po expect porridge only is returned`() = runTest {
+        storage.saveRecipes(TEST_RECIPE_SUMMARIES)
+        subject.setQuery("po")
+        assertThat(queryRecipes()).isEqualTo(listOf(PORRIDGE_RECIPE_SUMMARY_ENTITY))
+    }
+
+    @Test
+    fun `when query is e expect cake and porridge are returned`() = runTest {
+        storage.saveRecipes(TEST_RECIPE_SUMMARIES)
+        subject.setQuery("e")
+        assertThat(queryRecipes()).isEqualTo(TEST_RECIPE_SUMMARY_ENTITIES)
+    }
+
+    @Test
+    fun `when query is null expect cake and porridge are returned`() = runTest {
+        storage.saveRecipes(TEST_RECIPE_SUMMARIES)
+        subject.setQuery(null)
+        assertThat(queryRecipes()).isEqualTo(TEST_RECIPE_SUMMARY_ENTITIES)
+    }
+
+    private suspend fun queryRecipes(): List<RecipeSummaryEntity> {
+        val loadParam = PagingSource.LoadParams.Refresh<Int>(null, Int.MAX_VALUE, false)
+        val loadResult = subject.invoke().load(loadParam)
+        return (loadResult as PagingSource.LoadResult.Page).data
+    }
+
+}
+

app/src/test/java/gq/kirmanak/mealient/test/RecipeImplTestData.kt

@@ -69,6 +69,9 @@ object RecipeImplTestData {
         imageId = "porridge",
     )
 
+    val TEST_RECIPE_SUMMARY_ENTITIES =
+        listOf(CAKE_RECIPE_SUMMARY_ENTITY, PORRIDGE_RECIPE_SUMMARY_ENTITY)
+
     val SUGAR_INGREDIENT = RecipeIngredientInfo(
         note = "2 oz of white sugar",
     )