Add `.html` support (#3867)

* feat: add html package

* feat: support assets in HTML

* feat(html): upgrade html integration

* feat(html): add `@astrojs/html` integration

* feat(html): add html support to astro core

* test(html): update html tests with package.json files

* chore: add changeset

* fix: remove import cycle

* chore: fix types

* refactor: remove @astrojs/html, add to core

* chore: update types for `*.html`

* fix: move *.html to astro/env

Co-authored-by: Nate Moore <nate@astro.build>

1 files changed, 53 insertions, 0 deletions

diff --git a/packages/astro/test/html-page.test.js b/packages/astro/test/html-page.test.js
new file mode 100644
index 000000000..fe4c01f68
--- /dev/null
+++ b/packages/astro/test/html-page.test.js
@@ -0,0 +1,53 @@
+import { expect } from 'chai';
+import * as cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('HTML Page', () => {
+	let fixture;
+
+	before(async () => {
+		fixture = await loadFixture({
+			root: './fixtures/html-page/',
+		});
+	});
+
+	describe('build', () => {
+		before(async () => {
+			await fixture.build();
+		});
+
+		it('works', async () => {
+			const html = await fixture.readFile('/index.html');
+			const $ = cheerio.load(html)
+
+			const h1 = $('h1');
+
+			expect(h1.text()).to.equal('Hello page!');
+		});
+	});
+
+	describe('dev', () => {
+		let devServer;
+
+		before(async () => {
+			devServer = await fixture.startDevServer();
+		});
+
+		after(async () => {
+			await devServer.stop();
+		});
+
+		it('works', async () => {
+			const res = await fixture.fetch('/');
+
+			expect(res.status).to.equal(200);
+
+			const html = await res.text();
+			const $ = cheerio.load(html)
+
+			const h1 = $('h1');
+
+			expect(h1.text()).to.equal('Hello page!');
+		});
+	});
+});