test: Test cases for extensions: VTK, HTML and PDF (#1036)

* Test cases for extensions: VTK, HTML and PDF

* Test Cases: Delete measurement, Relabel and Description through Contextmenu

* Fix: PDF, HTML and VTK extensions

* CI: running into different folders for PWA and Script-tag tests

* CI: running into different folders for PWA and Script-tag tests

* CI: running into different folders for PWA and Script-tag tests

* Fix for VTK tests and Cornerstone Eraser tool

* Removed VTK alias from Cornerstone aliases initialization

* Temporary fix for Eraser tool

* Test workaround

* Use juno for vtk

* Shift VTK tests to PWA folder

platform/viewer/cypress/integration/pwa/OHIFExtensionHTML.spec.js

@@ -0,0 +1,24 @@
+describe('OHIF HTML Extension', () => {
+  before(() => {
+    cy.openStudy('Dummy');
+    cy.expectMinimumThumbnails(1);
+  });
+
+  it('checks if series thumbnails are being displayed', () => {
+    cy.get('[data-cy="thumbnail-list"]')
+      .contains('SR')
+      .its('length')
+      .should('to.be.at.least', 1);
+  });
+
+  it('drags and drop a SR thumbnail into viewport', () => {
+    cy.get('[data-cy="thumbnail-list"]')
+      .contains('SR')
+      .drag('.viewport-drop-target');
+
+    cy.get(':nth-child(2) > h1').should(
+      'contain.text',
+      'Imaging Measurement Report'
+    );
+  });
+});