test(nuxt): Cover pages router instrumentation

packages/nuxt/test/runtime/plugins/client.test.ts

@@ -0,0 +1,50 @@
+import { getClient } from '@sentry/core';
+import { browserTracingIntegration } from '@sentry/vue';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import clientPlugin from '../../../src/runtime/plugins/sentry.client';
+
+vi.mock(import('@sentry/core'), async importOriginal => {
+  const actual = await importOriginal();
+  return { ...actual, getClient: vi.fn() };
+});
+
+vi.mock(import('@sentry/vue'), async importOriginal => {
+  const actual = await importOriginal();
+  return { ...actual, browserTracingIntegration: vi.fn() };
+});
+
+vi.mock(import('nuxt/app'), () => ({
+  defineNuxtPlugin: vi.fn(plugin => plugin),
+  isNuxtError: vi.fn(),
+}));
+
+type ClientPlugin = {
+  setup: (nuxtApp: { $router?: unknown; hook: ReturnType<typeof vi.fn> }) => Promise<void>;
+};
+
+describe('Sentry client plugin', () => {
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  it('instruments the Nuxt pages router with path-based route labels', async () => {
+    const router = { beforeEach: vi.fn(), onError: vi.fn() };
+    const integration = { name: 'BrowserTracing' };
+    const addIntegration = vi.fn();
+    vi.mocked(getClient).mockReturnValue({ addIntegration } as never);
+    vi.mocked(browserTracingIntegration).mockReturnValue(integration as never);
+
+    await (clientPlugin as ClientPlugin).setup({ $router: router, hook: vi.fn() });
+
+    expect(browserTracingIntegration).toHaveBeenCalledWith({ router, routeLabel: 'path' });
+    expect(addIntegration).toHaveBeenCalledWith(integration);
+  });
+
+  it('does not create router instrumentation without an initialized client', async () => {
+    vi.mocked(getClient).mockReturnValue(undefined);
+
+    await (clientPlugin as ClientPlugin).setup({ $router: {}, hook: vi.fn() });
+
+    expect(browserTracingIntegration).not.toHaveBeenCalled();
+  });
+});