"Source commit"

tcr.py

+import subprocess
+
 class Tcr:
     def __init__(self, outside):
         self.outside = outside
@@ -9,3 +11,26 @@ class Tcr:
         else:
             self.outside.revert_source()
 
+
+class Outside:
+    def commit_test(self):
+        pass
+        subprocess.run(["git", "add", "./tests/"])
+        subprocess.run(["git", "commit", "-m", "\"Test commit\""])
+
+    def run_tests(self):
+        process = subprocess.run(["pytest", "-v"])
+        return process.returncode == 0
+
+
+    def revert_source(self):
+        raise NotImplementedError()
+
+    def commit_source(self):
+        subprocess.run(["git", "add", "./"])
+        subprocess.run(["git", "commit", "-m", "\"Source commit\""])
+
+
+if __name__ == '__main__':
+    tcr = Tcr(Outside())
+    tcr.run()