Add test_semantic_versions

tests/test_semantic_versions.py

@@ -0,0 +1,21 @@
+import re
+import zipfile
+from pathlib import Path
+
+import pytest
+import semantic_version
+
+from ingest_validation_tools.plugin_validator import validation_class_iter
+
+def test_plugin_semantic_versions():
+    plugin_dir = (Path(__file__).parent.parent
+                  / "src" / "ingest_validation_tests")
+    classnames = []
+    for cls in validation_class_iter(plugin_dir):
+        validator = cls(['.'], 'someassay', plugin_dir, [])
+        try:
+            ver = semantic_version.Version(cls.version)
+        except ValueError as excp:
+            assert False, (f"The plugin {cls.__name__} has version string"
+                           f" {cls.version}, which is not a valid semantic"
+                           " version")