Add test for fixup_module_metadata

tests/test_module_renaming.py

@@ -0,0 +1,16 @@
+import fbchat
+
+
+def test_module_renaming():
+    assert fbchat.Message.__module__ == "fbchat"
+    assert fbchat.Group.__module__ == "fbchat"
+    assert fbchat.Event.__module__ == "fbchat"
+    assert fbchat.User.block.__module__ == "fbchat"
+    assert fbchat.Session.login.__func__.__module__ == "fbchat"
+    assert fbchat.Session._from_session.__func__.__module__ == "fbchat"
+    assert fbchat.Message.session.fget.__module__ == "fbchat"
+    assert fbchat.Session.__repr__.__module__ == "fbchat"
+
+
+def test_did_not_rename():
+    assert fbchat._graphql.queries_to_json.__module__ != "fbchat"