Add commits-since function

tests/test_pr.py

@@ -3,7 +3,7 @@ import unittest.mock
 import requests
 import json
 
-from nixprstatus.pr import commit_in_branch, pr_merge_status
+from nixprstatus.pr import commit_in_branch, pr_merge_status, commits_since
 
 
 def mocked_requests_get(*args, **kwargs):
@@ -53,3 +53,12 @@ class TestCommitInBranch(unittest.TestCase):
         self.assertTrue(res)
         res = commit_in_branch(commit_sha, "nixos-24.05")
         self.assertFalse(res)
+
+
+class TestCommitsSince(unittest.TestCase):
+    @unittest.mock.patch("requests.get", side_effect=mocked_requests_get)
+    def test_commits_since_27e30d17(self, mock_get):
+        commit_sha = "27e30d177e57d912d614c88c622dcfdb2e6e6515"
+
+        res = commits_since("nixos-unstable", commit_sha)
+        self.assertEqual(res, 795)