feat: return inserted element from insertContent

npm/ng-packs/packages/core/src/lib/services/dom-insertion.service.ts

@@ -6,12 +6,16 @@ import { generateHash } from '../utils';
 export class DomInsertionService {
   readonly inserted = new Set<number>();
 
-  insertContent(contentStrategy: ContentStrategy) {
+  insertContent<T extends HTMLScriptElement | HTMLStyleElement>(
+    contentStrategy: ContentStrategy<T>,
+  ): T {
     const hash = generateHash(contentStrategy.content);
 
     if (this.inserted.has(hash)) return;
 
-    contentStrategy.insertElement();
+    const element = contentStrategy.insertElement();
     this.inserted.add(hash);
+
+    return element;
   }
 }

npm/ng-packs/packages/core/src/lib/tests/dom-insertion.service.spec.ts

@@ -9,7 +9,7 @@ describe('DomInsertionService', () => {
 
   beforeEach(() => (spectator = createService()));
 
-  afterEach(() => styleElements.forEach(element => element.remove()));
+  afterEach(() => (document.head.innerHTML = ''));
 
   describe('#insertContent', () => {
     it('should be able to insert given content', () => {
@@ -19,6 +19,11 @@ describe('DomInsertionService', () => {
       expect(styleElements[0].textContent).toBe('.test {}');
     });
 
+    it('should set a hash for the inserted content', () => {
+      spectator.service.insertContent(CONTENT_STRATEGY.AppendStyleToHead('.test {}'));
+      expect(spectator.service.inserted.has(1437348290)).toBe(true);
+    });
+
     it('should insert only once', () => {
       expect(spectator.service.inserted.has(1437348290)).toBe(false);
 
@@ -37,9 +42,11 @@ describe('DomInsertionService', () => {
       expect(spectator.service.inserted.has(1437348290)).toBe(true);
     });
 
-    it('should be able to insert given content', () => {
+    it('should return inserted element', () => {
-      spectator.service.insertContent(CONTENT_STRATEGY.AppendStyleToHead('.test {}'));
+      const element = spectator.service.insertContent(
-      expect(spectator.service.inserted.has(1437348290)).toBe(true);
+        CONTENT_STRATEGY.AppendStyleToHead('.test {}'),
+      );
+      expect(element.tagName).toBe('STYLE');
     });
   });
 });