[cypress] + com_cache (#43633)

* cy.cache

* Update tests/System/integration/administrator/components/com_cache/Default.cy.js

Co-authored-by: Heiko Lübbe <github@heikol.de>

* 4.4-only

---------

Co-authored-by: Heiko Lübbe <github@heikol.de>
Co-authored-by: Allon Moritz <allon.moritz@digital-peak.com>

tests/System/integration/administrator/components/com_cache/Default.cy.js

@@ -0,0 +1,29 @@
+describe('Test in backend that the cache', () => {
+  beforeEach(() => {
+    cy.doAdministratorLogin();
+    cy.visit('/administrator/index.php?option=com_cache&view=cache');
+  });
+
+  it('have a title', () => {
+    cy.get('h1.page-title').should('contain.text', 'Maintenance: Clear Cache');
+  });
+
+  it('can display message', () => {
+    cy.get('div.alert.alert-info').should('contain.text', 'Select the Clear Expired Cache button');
+  });
+
+  it('can display a list of chached items', () => {
+    cy.get('tr.row0').should('contain.text', '_media_version');
+  });
+
+  it('can clear expired cache', () => {
+    cy.get('#toolbar-delete2').click();
+    cy.on('window:confirm', () => true);
+    cy.get('#system-message-container').contains('Expired cached items have been cleared').should('exist');
+  });
+
+  it('can delete all', () => {
+    cy.get('#toolbar-delete1').click();
+    cy.get('#system-message-container').contains('All cache group(s) have been cleared').should('exist');
+  });
+});