Add test to make sure moduleMetadataIntegration can be lazy loaded

Author: gilisho

dev-packages/browser-integration-tests/suites/integrations/lazyLoad/moduleMetadataIntegration/init.js

@@ -0,0 +1,10 @@
+import * as Sentry from '@sentry/browser';
+
+Sentry.init({
+  dsn: 'https://[email protected]/1337',
+  integrations: [],
+});
+
+window.Sentry = {
+  ...Sentry,
+};

dev-packages/browser-integration-tests/suites/integrations/lazyLoad/moduleMetadataIntegration/subject.js

@@ -0,0 +1,7 @@
+window._testLazyLoadIntegration = async function run() {
+  const integration = await window.Sentry.lazyLoadIntegration('moduleMetadataIntegration');
+
+  window.Sentry.getClient()?.addIntegration(integration());
+
+  window._integrationLoaded = true;
+};

dev-packages/browser-integration-tests/suites/integrations/lazyLoad/moduleMetadataIntegration/test.ts

@@ -0,0 +1,33 @@
+import { expect } from '@playwright/test';
+import { SDK_VERSION } from '@sentry/browser';
+
+import { sentryTest } from '../../../../utils/fixtures';
+
+sentryTest('it allows to lazy load the moduleMetadata integration', async ({ getLocalTestUrl, page }) => {
+  const url = await getLocalTestUrl({ testDir: __dirname });
+
+  await page.route(`https://browser.sentry-cdn.com/${SDK_VERSION}/modulemetadata.min.js`, route => {
+    return route.fulfill({
+      status: 200,
+      contentType: 'application/javascript;',
+      body: "window.Sentry.moduleMetadataIntegration = () => ({ name: 'ModuleMetadata' })",
+    });
+  });
+
+  await page.goto(url);
+
+  const hasIntegration = await page.evaluate('!!window.Sentry.getClient()?.getIntegrationByName("ModuleMetadata")');
+  expect(hasIntegration).toBe(false);
+
+  const scriptTagsBefore = await page.evaluate<number>('document.querySelectorAll("script").length');
+
+  await page.evaluate('window._testLazyLoadIntegration()');
+  await page.waitForFunction('window._integrationLoaded');
+
+  const scriptTagsAfter = await page.evaluate<number>('document.querySelectorAll("script").length');
+
+  const hasIntegration2 = await page.evaluate('!!window.Sentry.getClient()?.getIntegrationByName("ModuleMetadata")');
+  expect(hasIntegration2).toBe(true);
+
+  expect(scriptTagsAfter).toBe(scriptTagsBefore + 1);
+});