Fix PhotoDaoTest

data/src/test/java/com/android/data/source/local/dao/PhotoDaoTest.kt

@@ -0,0 +1,84 @@
+package com.android.data.source.local.dao
+
+import com.android.data.TestUtil
+import com.android.data.source.local.entity.PhotoEntity
+import io.mockk.every
+import io.mockk.mockk
+import org.hamcrest.CoreMatchers
+import org.hamcrest.MatcherAssert
+import org.junit.Assert
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@RunWith(JUnit4::class)
+class PhotoDaoTest {
+
+    private var photoDao = mockk<PhotoDao>()
+
+    @Test
+    fun isPhotoListEmpty() {
+        every { photoDao.loadAll() } returns mutableListOf()
+        Assert.assertEquals(0, photoDao.loadAll().size)
+    }
+
+    @Test
+    fun insertPhoto() {
+        val photoEntity: PhotoEntity = TestUtil.createPhoto(7)
+
+        every { photoDao.insert(photoEntity) } returns 1L
+        val insertedPhoto = photoDao.insert(photoEntity)
+
+        Assert.assertNotNull(insertedPhoto)
+    }
+
+    @Test
+    fun insertPhotoAndLoadByTitle() {
+        val photoTitle = "Art"
+        val photoEntity: PhotoEntity = TestUtil.createPhoto(1).apply {
+            title = photoTitle
+        }
+        every { photoDao.insert(photoEntity) } returns 1L
+
+        every { photoDao.loadOneByPhotoTitle(photoTitle) } returns photoEntity
+        val photoLoadedByTitle = photoDao.loadOneByPhotoTitle(photoTitle)
+
+        MatcherAssert.assertThat(photoLoadedByTitle, CoreMatchers.equalTo(photoEntity))
+    }
+
+    @Test
+    fun retrievesPhotos() {
+        val photoEntities = TestUtil.makePhotoList(5)
+        photoEntities.forEach { photoDao.insert(it) }
+
+        every { photoDao.loadAll() } returns mutableListOf()
+        val loadedPhotos = photoDao.loadAll()
+
+        Assert.assertEquals(photoEntities, loadedPhotos)
+    }
+
+    @Test
+    fun deletePhoto() {
+        val photoId = 8L
+        val photoEntity = TestUtil.createPhoto(photoId)
+
+        every { photoDao.delete(photoEntity) } returns Unit
+        photoDao.delete(photoEntity)
+
+        every { photoDao.loadOneByPhotoId(photoId) } returns null
+        val loadOneByPhotoId = photoDao.loadOneByPhotoId(photoId)
+
+        Assert.assertNull(loadOneByPhotoId)
+    }
+
+    @Test
+    fun deleteAllPhotos() {
+        every { photoDao.deleteAll() } returns Unit
+        photoDao.deleteAll()
+
+        every { photoDao.loadAll() } returns mutableListOf()
+        val loadedAllPhotos = photoDao.loadAll()
+
+        assert(loadedAllPhotos.isEmpty())
+    }
+}