checkout version curl-7_67_0 of curl for the tests.

tests/conftest.py

@@ -0,0 +1,19 @@
+
+import os
+import pytest
+
+from git import Repo
+
+
+@pytest.fixture(scope='session')
+def clone_curl():
+    """Clone the repository of curl for the tests."""
+    git_url = 'https://github.com/curl/curl.git'
+    repo_dir = './test_repos/curl'
+    repo = Repo.clone_from(url=git_url, to_path=repo_dir)
+    repo.checkout('curl-7_67_0')
+
+    def teardown():
+        os.unlink(repo_dir)
+
+    return repo_dir