Mock the 404 body Gitea really returns

internal/agent/client_test.go

@@ -156,7 +156,7 @@ func TestEditPRAPIError(t *testing.T) {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/api/v1/repos/unkin/repo/pulls/7", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
-		_, _ = io.WriteString(w, `{"message":"pull request does not exist"}`)
+		_, _ = io.WriteString(w, `{"message":"not found","url":"https://git.unkin.net/api/swagger","errors":null}`)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
@@ -167,7 +167,7 @@ func TestEditPRAPIError(t *testing.T) {
 	if err == nil {
 		t.Fatal("expected error on 404")
 	}
-	if !strings.Contains(err.Error(), "pull request does not exist") {
+	if !strings.Contains(err.Error(), `"message":"not found"`) {
 		t.Errorf("error %q should carry the API message", err)
 	}
 }