feature: support .spa files for Single Page Apps

tests/11_test_spa.test.ts

@@ -0,0 +1,62 @@
+import * as asserts from '@std/assert';
+import { EPHEMERAL_SERVER, get_ephemeral_listen_server } from './helpers.ts';
+
+Deno.test({
+	name: 'check that .spa files work',
+	permissions: {
+		env: true,
+		read: true,
+		write: true,
+		net: true
+	},
+	fn: async () => {
+		let test_server_info: EPHEMERAL_SERVER | null = null;
+		const cwd = Deno.cwd();
+
+		try {
+			Deno.chdir('./tests/www');
+			test_server_info = await get_ephemeral_listen_server();
+
+			{
+				const response = await fetch(`http://${test_server_info.hostname}:${test_server_info.port}/spa/foo/bar/baz`, {
+					method: 'GET'
+				});
+
+				const body = await response.text();
+
+				asserts.assert(response.ok);
+				asserts.assert(body);
+				asserts.assertMatch(body, /SPA PAGE/s);
+			}
+
+			{
+				const response = await fetch(`http://${test_server_info.hostname}:${test_server_info.port}/spa/testing`, {
+					method: 'GET'
+				});
+
+				const body = await response.text();
+
+				asserts.assert(response.ok);
+				asserts.assert(body);
+				asserts.assertMatch(body, /Hello World - Testing/s);
+			}
+
+			{
+				const response = await fetch(`http://${test_server_info.hostname}:${test_server_info.port}/spa/testing/blah.html`, {
+					method: 'GET'
+				});
+
+				const body = await response.text();
+
+				asserts.assert(response.ok);
+				asserts.assert(body);
+				asserts.assertMatch(body, /Hello World - Blah/s);
+			}
+		} finally {
+			Deno.chdir(cwd);
+			if (test_server_info) {
+				await test_server_info?.server?.stop();
+			}
+		}
+	}
+});