test for synthesize.py

tests/__init__.py

@@ -14,3 +14,8 @@ def get_tests_input_path():
 def get_tests_output_path():
     """Returns the path to the directory for test outputs."""
     return os.path.join(get_tests_path(), "outputs")
+
+
+def run_cli(command):
+    exit_status = os.system(command)
+    assert exit_status == 0, f" [!] command `{command}` failed."