test(git): add test case for git object

Author: Lee-W

tests/test_git.py

@@ -0,0 +1,11 @@
+from commitizen import git
+
+
+def test_git_object_eq():
+    git_commit = git.GitCommit(
+        rev="sha1-code", title="this is title", body="this is body"
+    )
+    git_tag = git.GitTag(rev="sha1-code", name="0.0.1", date="2020-01-21")
+
+    assert git_commit == git_tag
+    assert git_commit != "sha1-code"