Added --uuid-from-file to CLI

tests/test_cli_utils.py

@@ -0,0 +1,29 @@
+""" Test utility functions in __main__.py """
+
+import pytest
+
+UUID_FILE = "tests/uuid_from_file.txt"
+MISSING_UUID_FILE = "tests/uuid_not_found.txt"
+
+UUID_EXPECTED_FROM_FILE = [
+    "E9BC5C36-7CD1-40A1-A72B-8B8FAC227D51",
+    "6191423D-8DB8-4D4C-92BE-9BBBA308AAC4",
+    "A92D9C26-3A50-4197-9388-CB5F7DB9FA91",
+]
+
+
+def test_load_uuid_from_file():
+    """Test load_uuid_from_file function """
+    from osxphotos.__main__ import load_uuid_from_file
+
+    uuid_got = load_uuid_from_file(UUID_FILE)
+    assert uuid_got == UUID_EXPECTED_FROM_FILE
+
+
+def test_load_uuid_from_file_filenotfound():
+    """Test load_uuid_from_file function raises error if file not found"""
+    from osxphotos.__main__ import load_uuid_from_file
+
+    with pytest.raises(FileNotFoundError) as err:
+        uuid_got = load_uuid_from_file(MISSING_UUID_FILE)
+        assert "Could not find" in str(err.value)