Check Feishu directory scope and highlight app availability

backend/internal/identityprovider/directory_sync_test.go

@@ -60,3 +60,46 @@ func TestReadDirectoryFailsClosedOnIncompletePage(t *testing.T) {
 		t.Fatalf("accepted partial directory: %v", err)
 	}
 }
+
+func TestDirectoryAccessCheckDistinguishesVisibilityAndEndpointPermission(t *testing.T) {
+	previous := upstreamClient
+	t.Cleanup(func() { upstreamClient = previous })
+	visible := false
+	calls := 0
+	upstreamClient = &http.Client{Transport: transportFunc(func(req *http.Request) (*http.Response, error) {
+		calls++
+		body := `{"code":0,"data":{}}`
+		switch req.URL.Path {
+		case "/open-apis/auth/v3/tenant_access_token/internal":
+			body = `{"code":0,"tenant_access_token":"private-token"}`
+		case "/open-apis/contact/v3/scopes":
+			if req.Header.Get("Authorization") != "Bearer private-token" {
+				t.Fatal("missing scoped tenant token")
+			}
+			if visible {
+				body = `{"code":0,"data":{"department_ids":["0"],"user_ids":["ou_1"]}}`
+			} else {
+				body = `{"code":0,"data":{"department_ids":[],"user_ids":["ou_1"]}}`
+			}
+		case "/open-apis/contact/v3/departments/0/children":
+			body = `{"code":99991672,"msg":"private upstream message"}`
+		case "/open-apis/contact/v3/users":
+			body = `{"code":0,"data":{"items":[{"name":"private user"}]}}`
+		default:
+			t.Fatalf("unexpected endpoint: %s", req.URL)
+		}
+		return &http.Response{StatusCode: 200, Body: io.NopCloser(strings.NewReader(body)), Header: make(http.Header)}, nil
+	})}
+	result, err := checkDirectoryAccess(context.Background(), "cli_test", "private-secret")
+	if err != nil || result["visible_departments"] != 0 || result["department_access"] != "unverified" || calls != 2 {
+		t.Fatalf("false permission conclusion for invisible departments: %v %v calls=%d", result, err, calls)
+	}
+	visible = true
+	result, err = checkDirectoryAccess(context.Background(), "cli_test", "private-secret")
+	if err != nil || result["department_access"] != "denied" || result["user_list_access"] != "ok" {
+		t.Fatalf("wrong endpoint probes: %v %v", result, err)
+	}
+	if raw := result["department_error"].(string); !strings.Contains(raw, "99991672") || strings.Contains(raw, "private upstream message") || strings.Contains(raw, "private-token") {
+		t.Fatalf("error leaked upstream data or omitted code: %s", raw)
+	}
+}