feat(pulls): add scheduled auto-merge cancellation

Co-Authored-By: Virgil <virgil@lethean.io>

pulls.go

@@ -32,6 +32,12 @@ func (s *PullService) Merge(ctx context.Context, owner, repo string, index int64
 	return s.client.Post(ctx, path, body, nil)
 }
 
+// CancelScheduledAutoMerge cancels the scheduled auto merge for a pull request.
+func (s *PullService) CancelScheduledAutoMerge(ctx context.Context, owner, repo string, index int64) error {
+	path := ResolvePath("/api/v1/repos/{owner}/{repo}/pulls/{index}/merge", pathParams("owner", owner, "repo", repo, "index", int64String(index)))
+	return s.client.Delete(ctx, path)
+}
+
 // Update updates a pull request branch with the base branch.
 func (s *PullService) Update(ctx context.Context, owner, repo string, index int64) error {
 	path := ResolvePath("/api/v1/repos/{owner}/{repo}/pulls/{index}/update", pathParams("owner", owner, "repo", repo, "index", int64String(index)))

pulls_test.go

@@ -273,3 +273,23 @@ func TestPullService_Merge_Bad(t *testing.T) {
 		t.Fatalf("expected conflict, got %v", err)
 	}
 }
+
+func TestPullService_CancelScheduledAutoMerge_Good(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Errorf("expected DELETE, got %s", r.Method)
+		}
+		if r.URL.Path != "/api/v1/repos/core/go-forge/pulls/7/merge" {
+			t.Errorf("wrong path: %s", r.URL.Path)
+			http.NotFound(w, r)
+			return
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer srv.Close()
+
+	f := NewForge(srv.URL, "tok")
+	if err := f.Pulls.CancelScheduledAutoMerge(context.Background(), "core", "go-forge", 7); err != nil {
+		t.Fatal(err)
+	}
+}