Added an api test for site menu items (#42708)

tests/System/integration/api/com_menus/SiteMenuItems.cy.js

@@ -0,0 +1,57 @@
+describe('Test that menu items site API endpoint', () => {
+  afterEach(() => cy.task('queryDB', "DELETE FROM #__menu WHERE title = 'automated test site menu item' "));
+
+  it('can deliver a list of site menu items types', () => {
+    cy.api_get('/menus/site/items/types')
+      .then((response) => cy.wrap(response).its('body').its('data.0').its('type')
+        .should('include', 'menutypes'));
+  });
+
+  it('can deliver a list of site menu items', () => {
+    cy.db_createMenuItem({ title: 'automated test site menu item' })
+      .then(() => cy.api_get('/menus/site/items'))
+      .then((response) => cy.api_responseContains(response, 'title', 'automated test site menu item'));
+  });
+
+  it('can deliver a single site menu item', () => {
+    cy.db_createMenuItem({ title: 'automated test site menu item' })
+      .then((id) => cy.api_get(`/menus/site/items/${id}`))
+      .then((response) => cy.wrap(response).its('body').its('data').its('attributes')
+        .its('title')
+        .should('include', 'automated test site menu item'));
+  });
+
+  it('can create a site menu item', () => {
+    cy.api_post('/menus/site/items', {
+      title: 'automated test site menu item',
+      menutype: 'main-menu',
+      access: '1',
+      parent_id: '1',
+      publish_down: '',
+      publish_up: '',
+      published: '1',
+      template_style_id: '0',
+      toggle_modules_assigned: '1',
+      toggle_modules_published: '1',
+      type: 'component',
+      alias: '',
+      link: '',
+    })
+      .then((response) => cy.wrap(response).its('body').its('data').its('attributes')
+        .its('title')
+        .should('include', 'automated test site menu item'));
+  });
+
+  it('can update a site menu item', () => {
+    cy.db_createMenuItem({ title: 'automated test site menu item', type: 'component' })
+      .then((id) => cy.api_patch(`/menus/site/items/${id}`, { title: 'updated automated test site menu item', type: 'component' }))
+      .then((response) => cy.wrap(response).its('body').its('data').its('attributes')
+        .its('title')
+        .should('include', 'updated automated test site menu item'));
+  });
+
+  it('can delete a site menu item', () => {
+    cy.db_createMenuItem({ title: 'automated test site menu item', published: -2 })
+      .then((id) => cy.api_delete(`/menus/site/items/${id}`));
+  });
+});