🧪 [testing improvement] Cover hasNetworkConsent error handling

nexus/frontend/jest.config.ts

@@ -0,0 +1,16 @@
+import type { Config } from 'jest';
+
+const config: Config = {
+  preset: 'ts-jest',
+  testEnvironment: 'jsdom',
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+  transform: {
+    '^.+\\.tsx?$': ['ts-jest', {
+      tsconfig: 'tsconfig.json',
+    }],
+  },
+};
+
+export default config;

nexus/frontend/package.json

@@ -42,13 +42,19 @@
     "zod": "^4.3.6"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
     "@types/babel__traverse": "^7.28.0",
+    "@types/jest": "^30.0.0",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9",
     "eslint-config-next": "16.1.6",
+    "jest": "^30.4.0",
+    "jest-environment-jsdom": "^30.4.0",
     "tailwindcss": "^3.4.1",
+    "ts-jest": "^29.4.9",
     "typescript": "^5"
   }
 }

nexus/frontend/src/lib/network-consent.spec.ts

@@ -0,0 +1,27 @@
+describe('network-consent', () => {
+  let hasNetworkConsent: () => boolean;
+
+  beforeEach(async () => {
+    jest.resetModules();
+    const networkConsentModule = await import('./network-consent');
+    hasNetworkConsent = networkConsentModule.hasNetworkConsent;
+  });
+
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  describe('hasNetworkConsent', () => {
+    it('should return false if sessionStorage.getItem throws', () => {
+      // Mock getItem to throw
+      const getItemSpy = jest.spyOn(window.sessionStorage.__proto__, 'getItem').mockImplementation(() => {
+        throw new Error('Access denied');
+      });
+
+      const result = hasNetworkConsent();
+
+      expect(result).toBe(false);
+      expect(getItemSpy).toHaveBeenCalledWith('k_network_consent_granted');
+    });
+  });
+});