Update Branch.sync_with_upstream to correcly send required data. (#1199)

* Update Branch.sync_with_upstream to correcly send required data.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fix lint errors.

* Fix silly test error.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: devdanzin

AUTHORS.rst

@@ -226,3 +226,5 @@ Contributors
 - Thomas Buchner (@MrBatschner)
 
 - Chris Cotter (@ccotter)
+
+- Daniel Diniz (@devdanzin)

src/github3/repos/branch.py

@@ -166,17 +166,13 @@ def protect(
     def sync_with_upstream(self) -> t.Mapping[str, str]:
         """Synchronize this branch with the upstream.
 
-        .. warning::
-
-            This API endpoint is still in Beta per gitHub
-
         .. versionadded:: 3.0.0
 
         Sync a branch of a forked repository to keep it up-to-date with the
         upstream repository.
 
         See also:
-        https://docs.github.com/en/rest/reference/repos#sync-a-fork-branch-with-the-upstream-repository
+        https://docs.github.com/en/rest/branches/branches#sync-a-fork-branch-with-the-upstream-repository
 
         :returns:
             The dictionary described in the documentation
@@ -185,7 +181,7 @@ def sync_with_upstream(self) -> t.Mapping[str, str]:
         """
         base = self._api.split("/branches", 1)[0]
         url = self._build_url("merge-upstream", base_url=base)
-        json = self._json(self._post(url), 200)
+        json = self._json(self._post(url, data={"branch": self.name}), 200)
         return json
 
     @decorators.requires_auth

tests/cassettes/Branch_sync_with_upstream.json

@@ -0,0 +1 @@
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tests/integration/test_repos_branch.py

@@ -33,3 +33,22 @@ def test_latest_sha_differs(self):
             latest_sha = branch.latest_sha(differs_from=sha)
 
         assert not isinstance(latest_sha, bytes)
+
+    def test_sync_with_upstream(self):
+        self.token_login()
+        cassette_name = self.cassette_name("sync_with_upstream")
+        betamax_kwargs = {
+            "match_requests_on": ["method", "uri", "if-none-match"]
+        }
+        with self.recorder.use_cassette(cassette_name, **betamax_kwargs):
+            repository = self.gh.repository("devdanzin", "cpython")
+            branch = repository.branch("main")
+            result = branch.sync_with_upstream()
+
+        msg = (
+            "Successfully fetched and fast-forwarded"
+            " from upstream python:main."
+        )
+        assert result["message"] == msg
+        assert result["merge_type"] == "fast-forward"
+        assert result["base_branch"] == "python:main"

tests/unit/test_repos_branch.py

@@ -11,6 +11,9 @@
 url_for_commits = helper.create_url_helper(
     "https://api.github.com/repos/octocat/Hello-World/commits/master"
 )
+url_for_sync = helper.create_url_helper(
+    "https://api.github.com/repos/octocat/Hello-World/merge-upstream"
+)
 
 
 class TestBranch(helper.UnitHelper):
@@ -30,6 +33,13 @@ def test_latest_sha(self):
             url_for_commits(), headers=headers
         )
 
+    def test_sync_with_upstream(self):
+        """Verify the request fot syncing a branch with upstream."""
+        self.instance.sync_with_upstream()
+        self.session.post.assert_called_once_with(
+            url_for_sync(), '{"branch": "master"}'
+        )
+
     def test_unprotect(self):
         """Verify the request to unprotect a branch."""
         self.instance.unprotect()
@@ -44,6 +54,10 @@ class TestBranchRequiresAuth(helper.UnitRequiresAuthenticationHelper):
     described_class = github3.repos.branch.Branch
     example_data = get_example_data()
 
+    def test_sync_with_upstream(self):
+        """Verify that branch syncing with upstream requires authentication."""
+        self.assert_requires_auth(self.instance.sync_with_upstream)
+
     def test_protect(self):
         """Verify that protecting a branch requires authentication."""
         self.assert_requires_auth(self.instance.protect)