Add basic tests

Author: alekswebnet

src/pdfjs-viewer-element.ts

@@ -71,6 +71,7 @@ export class PdfjsViewerElement extends HTMLElement {
 
   private setEventListeners() {
     document.addEventListener('webviewerloaded', () => {
+      console.log(this.iframe.contentWindow.PDFViewerApplication)
       if (this.getAttribute('src') !== DEFAULTS.src) this.iframe.contentWindow.PDFViewerApplicationOptions?.set('defaultUrl', '')
       this.iframe.contentWindow.PDFViewerApplicationOptions?.set('disablePreferences', true);
       this.iframe.contentWindow.PDFViewerApplicationOptions?.set('pdfBugEnabled', true);
@@ -90,6 +91,7 @@ declare global {
 }
 
 export interface PdfjsViewerElementIframeWindow extends Window {
+  PDFViewerApplication: any,
   PDFViewerApplicationOptions: {
     set: (name: string, value: string | boolean) => void
   }

tests/basic.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, it } from 'vitest'
 import { getViewerContainer, renderViewer } from './test-utils'
 import '../src/pdfjs-viewer-element'
 
-describe('Viewer render process', async () => {
+describe('Basic render process', async () => {
   it('should render the PDF file', async () => {
     await renderViewer(`
       <pdfjs-viewer-element