Implement unittests

semver/scm/mock.py

@@ -0,0 +1,20 @@
+from typing import Union
+
+from semver.scm import SCM
+
+
+class MockSCM(SCM):
+    def get_tag_version(self) -> str:
+        return "1.0.0"
+
+    def get_branch(self) -> str:
+        return "main"
+
+    def get_merge_branch(self) -> Union[str, None]:
+        return "main"
+
+    def commit_and_push(self, branch: str) -> None:
+        pass
+
+    def tag_version(self, version: str) -> None:
+        pass