[@astrojs/vercel] Individually enable Speed Insights and Web Analytics (#8021)

* Individually enable Speed Insights and Web Analytics

* Update pnpm-lock.yaml

* Remove .only on tests

* Fix build

* Move `beforeSend` out of config

* Address feedback from review

* Update README.md

* Add back the `analytics` property and add deprecation warning when used

* Add migration guide for the deprecated `analytics` property

* Update packages/integrations/vercel/README.md

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Update README.md

* Fix external dependency issue

* Simplify plugin and reduce scope

* Update .changeset/sixty-teachers-tap.md

Co-authored-by: Emanuele Stoppa <my.burning@gmail.com>

* Apply feedback from review

* Move exposeEnv to speed-insights since it's only used there

---------

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>
Co-authored-by: Matthew Phillips <matthew@skypack.dev>
Co-authored-by: Emanuele Stoppa <my.burning@gmail.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/packages/integrations/vercel/test/web-analytics.test.js b/packages/integrations/vercel/test/web-analytics.test.js
new file mode 100644
index 000000000..b728fae4c
--- /dev/null
+++ b/packages/integrations/vercel/test/web-analytics.test.js
@@ -0,0 +1,25 @@
+import { loadFixture } from './test-utils.js';
+import { expect } from 'chai';
+
+describe('Vercel Web Analytics', () => {
+	describe('output: static', () => {
+		/** @type {import('./test-utils.js').Fixture} */
+		let fixture;
+
+		before(async () => {
+			fixture = await loadFixture({
+				root: './fixtures/with-web-analytics-enabled/output-as-static/',
+				output: 'static',
+			});
+			await fixture.build();
+		});
+
+		it('ensures that Vercel Web Analytics is present in the header', async () => {
+			const pageOne = await fixture.readFile('../.vercel/output/static/one/index.html');
+			const pageTwo = await fixture.readFile('../.vercel/output/static/two/index.html');
+
+			expect(pageOne).to.contain('/_vercel/insights/script.js');
+			expect(pageTwo).to.contain('/_vercel/insights/script.js');
+		});
+	});
+});