add test

packages/astro/test/astro-attrs.test.js

@@ -31,6 +31,9 @@ describe('Attributes', async () => {
 			'html-enum-false': { attribute: 'draggable', value: 'false' },
 		};
 
+		// cheerio will unescape the values, so checking that the url rendered unescaped to begin with has to be done manually
+		assert.equal(html.includes("https://example.com/api/og?title=hello&description=somedescription"), true);
+
 		for (const id of Object.keys(attrs)) {
 			const { attribute, value } = attrs[id];
 			const attr = $(`#${id}`).attr(attribute);

packages/astro/test/fixtures/astro-attrs/src/pages/index.astro

@@ -5,6 +5,7 @@
 <span id="empty" attr="" />
 <span id="null" attr={null} />
 <span id="undefined" attr={undefined} />
+<span id="url" attr={"https://example.com/api/og?title=hello&description=somedescription"}/>
 <!--
     Per HTML spec, some attributes should be treated as booleans
     These should always render <span async /> or <span /> (without a string value)