Add Cypress delete success spec

cypress/e2e/delete.spec.ts

@@ -0,0 +1,57 @@
+/// <reference types="cypress" />
+
+const REGION_NAME = `Delete Flow Region ${Date.now()}`
+
+describe('Delete flow', () => {
+  before('Wait for database and reset', () => {
+    cy.task('waitForDbHealthy')
+    cy.request(Cypress.env('databaseResetUrl'))
+  })
+
+  beforeEach('Login as delete-capable coordinator', () => {
+    cy.loginAsDeleteCoordinator()
+  })
+
+  it('deletes a region and removes it from the table', () => {
+    cy.deleteTargets().then((targets: DeleteTarget[]) => {
+      const regionTarget = targets.find(target => target.entity === 'Region')
+      if (!regionTarget) {
+        throw new Error('Region delete target metadata is missing')
+      }
+
+      cy.visit('/region/new')
+      cy.contains('Creating new region')
+      cy.contains('Region: This field is required')
+      cy.get('[id=region-textfield]').type(REGION_NAME)
+      cy.get('[id=write-button]').should('not.be.disabled').click()
+
+      cy.contains(REGION_NAME)
+      cy.get(regionTarget.deleteButton).should('exist')
+
+      cy.url().should('match', /\/region\/\d+$/)
+      cy.url().then(url => {
+        const createdId = url.split('/').pop()
+        expect(createdId, 'created region id').to.match(/\d+/)
+
+        cy.intercept('DELETE', `**/region/${createdId}`).as('deleteRegion')
+
+        cy.on('window:confirm', message => {
+          expect(message).to.eq(regionTarget.confirmText)
+          return true
+        })
+
+        cy.get(regionTarget.deleteButton).click()
+
+        cy.wait('@deleteRegion').its('response.statusCode').should('be.oneOf', [200])
+
+        cy.contains('Deleted item successfully.').should('be.visible')
+
+        cy.url().should('include', '/region')
+        cy.contains(REGION_NAME).should('not.exist')
+
+        cy.visit(`/region/${createdId}`)
+        cy.contains('Error loading data')
+      })
+    })
+  })
+})