failing test for bad markup

Author: Brian Whitton

tests/integration/instance-initializers/clear-double-boot-test.js

@@ -18,4 +18,22 @@ module('Instance-initializer: clear-double-boot', function(hooks) {
     assert.notOk(this.element.querySelector('#fastboot-body-end'), 'There is no end marker');
     assert.notOk(this.element.querySelector('#content-in-between'), 'The content is between is gone');
   });
+
+  test('It can handle bad markup', async function(assert) {
+    this.set('BAD_HTML', `
+      <script type="x/boundary" id="fastboot-body-start"></script>
+      <div id="content-in-between">
+        <em><em>
+      </div>
+      <script type="x/boundary" id="fastboot-body-end"></script>
+    `);
+
+    // render the whole tree dynamically to more closely mimc bad markup cases
+    await render(hbs`{{{BAD_HTML}}}`);
+
+    clearHtml();
+    assert.notOk(this.element.querySelector('#fastboot-body-start'), 'There is no start marker');
+    assert.notOk(this.element.querySelector('#fastboot-body-end'), 'There is no end marker');
+    assert.notOk(this.element.querySelector('#content-in-between'), 'The content is between is gone');
+  })
 });