added infrastructure code

tests/unit/test_image_repository.py

@@ -0,0 +1,98 @@
+"""Unit tests for ImageRepository class."""
+
+import unittest
+from unittest.mock import patch, MagicMock, _patch_dict
+from uuid import UUID
+from PIL import Image
+
+from data_store.repositories.image_repository import ImageRepository
+
+
+class TestImageRepository(unittest.TestCase):
+    """Unit tests for ImageRepository class."""
+
+    patcher: _patch_dict
+    repo: ImageRepository
+    image: Image.Image
+    bad_image: str
+    image_id: UUID
+    bad_image_id: str
+
+    @classmethod
+    def setUpClass(cls) -> None:
+        """Set up test case with a mocked MinioAdapter."""
+        # Patch environment variables for MinioAdapter
+        cls.patcher = patch.dict(
+            "os.environ",
+            {
+                "MINIO_ENDPOINT": "localhost:9000",
+                "MINIO_ACCESS_KEY": "minioadmin",
+                "MINIO_SECRET_KEY": "minioadmin",
+                "MINIO_BUCKET": "test-bucket",
+            },
+        )
+        cls.patcher.start()
+        # Prepare ImageRepository with mocked MinioAdapter
+        cls.repo = ImageRepository()
+        cls.repo._get = MagicMock(return_value=None)  # type: ignore[method-assign]
+        cls.repo._put = MagicMock(return_value=None)  # type: ignore[method-assign]
+        cls.repo._delete = MagicMock(return_value=None)  # type: ignore[method-assign]
+        # Prepare other test variables
+        cls.image = Image.new("RGB", (10, 10))
+        cls.image_id = UUID("d87022f8-4169-4d69-8512-bbd65cc1cb23")
+        cls.bad_image = "not_an_image"
+        cls.bad_image_id = "not-a-uuid"
+
+    @classmethod
+    def tearDownClass(cls) -> None:
+        # Stop patching
+        cls.patcher.stop()
+
+    def setUp(self) -> None:
+        """Set up each test with a fresh ImageRepository instance."""
+        self.repo._get.reset_mock()  # type: ignore[attr-defined]
+        self.repo._put.reset_mock()  # type: ignore[attr-defined]
+        self.repo._delete.reset_mock()  # type: ignore[attr-defined]
+
+    def test_should_adhere_to_interface(self) -> None:
+        """Test that ImageRepository adheres to ImageRepositoryInterface."""
+        # Instantiation fails if interface not adhered to
+        _ = ImageRepository()
+
+    def test_should_have_image_format_set(self) -> None:
+        """Test that ImageRepository has image_format set."""
+        self.assertTrue(hasattr(self.repo, "image_format"))
+
+    def test_should_have_folder_name_set(self) -> None:
+        """Test that ImageRepository has folder_name set."""
+        self.assertTrue(hasattr(self.repo, "folder_name"))
+
+    def test_object_name_invalid_image_id_raises_value_error(self) -> None:
+        """Test that _object_name() raises ValueError for invalid image_id."""
+        with self.assertRaises(ValueError):
+            _ = self.repo._object_name(self.bad_image_id)  # type: ignore
+
+    def test_get_invalid_image_id_raises_value_error(self) -> None:
+        """Test getting an image with invalid image_id."""
+        with self.assertRaises(ValueError):
+            self.repo.get(self.bad_image_id)  # type: ignore
+
+    def test_put_invalid_image_id_raises_value_error(self) -> None:
+        """Test putting an image with invalid image_id."""
+        with self.assertRaises(ValueError):
+            self.repo.put(self.image, self.bad_image_id)  # type: ignore
+
+    def test_put_invalid_image_type_raises_value_error(self) -> None:
+        """Test putting an invalid image type."""
+        with self.assertRaises(ValueError):
+            self.repo.put(self.bad_image, self.bad_image_id)  # type: ignore
+
+    def test_delete_invalid_image_id_raises_value_error(self) -> None:
+        """Test deleting an image with invalid image_id."""
+        with self.assertRaises(ValueError):
+            self.repo.delete(self.bad_image_id)  # type: ignore
+
+
+# Allows local debugging by running file as script
+if __name__ == "__main__":
+    unittest.main()