Add tests for version existence and semantic format

tests/test_version.py

@@ -0,0 +1,18 @@
+from cdtools import __version__
+import re
+
+
+def test_version_exists():
+    """Test that version is defined and not empty."""
+    assert __version__
+    assert isinstance(__version__, str)
+    assert len(__version__) > 0
+
+
+def test_version_format():
+    """Test that version follows semantic versioning format."""
+    # Basic semantic versioning pattern (X.Y.Z with optional pre-release)
+    pattern = r"^\d+\.\d+\.\d+(?:[-.]?(?:alpha|beta|rc|dev)\d*)?$"
+    assert re.match(
+        pattern, __version__
+    ), f"Version '{__version__}' doesn't follow semantic versioning"