Merge pull request from GHSA-vw39-6w7q-gfx5

Co-authored-by: Robin Ward <robin.ward@gmail.com>

test/javascripts/components/iframed-html-test.js.es6

@@ -0,0 +1,23 @@
+import componentTest from "helpers/component-test";
+
+moduleForComponent("iframed-html", { integration: true });
+
+componentTest("appends the html into the iframe", {
+  template: `{{iframed-html html="<h1 id='find-me'>hello</h1>" className='this-is-an-iframe'}}`,
+
+  async test(assert) {
+    const iframe = find("iframe.this-is-an-iframe");
+    assert.equal(iframe.length, 1, "inserts an iframe");
+
+    assert.ok(
+      iframe[0].classList.contains("this-is-an-iframe"),
+      "Adds className to the iframes classList"
+    );
+
+    assert.equal(
+      iframe[0].contentWindow.document.body.querySelectorAll("#find-me").length,
+      1,
+      "inserts the passed in html into the iframe"
+    );
+  }
+});