[Glimmer2] Port {{textarea}} test to ember-glimmer.

packages/ember-glimmer/tests/integration/helpers/text-area-test.js

@@ -0,0 +1,49 @@
+import { set } from 'ember-metal/property_set';
+import TextArea from 'ember-views/views/text_area';
+import { RenderingTest, moduleFor } from '../../utils/test-case';
+
+class TextAreaRenderingTest extends RenderingTest {
+  constructor() {
+    super();
+
+    this.registerComponent('-text-area', { ComponentClass: TextArea });
+  }
+}
+
+moduleFor('Helpers test: {{textarea}}', class extends TextAreaRenderingTest {
+
+  ['@htmlbars Should insert a textarea']() {
+    this.render('{{textarea}}');
+
+    equal(this.$('textarea').length, 1);
+
+    this.assertStableRerender();
+  }
+
+  ['@htmlbars Should become disabled when the context changes']() {
+    this.render('{{textarea disabled=disabled}}');
+    ok(this.$('textarea').is(':not(:disabled)'));
+
+    this.assertStableRerender();
+
+    this.runTask(() => set(this.context, 'disabled', true));
+    ok(this.$('textarea').is(':disabled'));
+
+    this.runTask(() => set(this.context, 'disabled', false));
+    ok(this.$('textarea').is(':not(:disabled)'));
+  }
+
+  ['@htmlbars Should bind its contents to the specified value']() {
+    this.render('{{textarea value=val}}', { val: 'A beautiful day in Seattle' });
+    ok(this.$('textarea').val('A beautiful day in Seattle'));
+
+    this.assertStableRerender();
+
+    this.runTask(() => set(this.context, 'val', 'Auckland'));
+    ok(this.$('textarea').val('Auckland'));
+
+    this.runTask(() => set(this.context, 'val', 'A beautiful day in Seattle'));
+    ok(this.$('textarea').val('A beautiful day in Seattle'));
+  }
+
+});