refactor: move angular source to /packages rather than modules/@angular

packages/platform-browser/test/dom/shared_styles_host_spec.ts

@@ -0,0 +1,59 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {beforeEach, describe, it} from '@angular/core/testing/testing_internal';
+import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
+import {DomSharedStylesHost} from '@angular/platform-browser/src/dom/shared_styles_host';
+import {expect} from '@angular/platform-browser/testing/matchers';
+
+export function main() {
+  describe('DomSharedStylesHost', () => {
+    let doc: Document;
+    let ssh: DomSharedStylesHost;
+    let someHost: Element;
+    beforeEach(() => {
+      doc = getDOM().createHtmlDocument();
+      doc.title = '';
+      ssh = new DomSharedStylesHost(doc);
+      someHost = getDOM().createElement('div');
+    });
+
+    it('should add existing styles to new hosts', () => {
+      ssh.addStyles(['a {};']);
+      ssh.addHost(someHost);
+      expect(getDOM().getInnerHTML(someHost)).toEqual('<style>a {};</style>');
+    });
+
+    it('should add new styles to hosts', () => {
+      ssh.addHost(someHost);
+      ssh.addStyles(['a {};']);
+      expect(getDOM().getInnerHTML(someHost)).toEqual('<style>a {};</style>');
+    });
+
+    it('should add styles only once to hosts', () => {
+      ssh.addStyles(['a {};']);
+      ssh.addHost(someHost);
+      ssh.addStyles(['a {};']);
+      expect(getDOM().getInnerHTML(someHost)).toEqual('<style>a {};</style>');
+    });
+
+    it('should use the document head as default host', () => {
+      ssh.addStyles(['a {};', 'b {};']);
+      expect(doc.head).toHaveText('a {};b {};');
+    });
+
+    it('should remove style nodes on destroy', () => {
+      ssh.addStyles(['a {};']);
+      ssh.addHost(someHost);
+      expect(getDOM().getInnerHTML(someHost)).toEqual('<style>a {};</style>');
+
+      ssh.ngOnDestroy();
+      expect(getDOM().getInnerHTML(someHost)).toEqual('');
+    });
+  });
+}