Simplify registration with email validation (#11398)

cypress/support/mailhog.ts

@@ -0,0 +1,54 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/// <reference types="cypress" />
+
+import mailhog from "mailhog";
+
+import Chainable = Cypress.Chainable;
+import { Instance } from "../plugins/mailhog";
+
+export interface Mailhog {
+    api: mailhog.API;
+    instance: Instance;
+}
+
+declare global {
+    // eslint-disable-next-line @typescript-eslint/no-namespace
+    namespace Cypress {
+        interface Chainable {
+            startMailhog(): Chainable<Mailhog>;
+            stopMailhog(instance: Mailhog): Chainable<void>;
+        }
+    }
+}
+
+Cypress.Commands.add("startMailhog", (): Chainable<Mailhog> => {
+    return cy.task<Instance>("mailhogStart", { log: false }).then((x) => {
+        Cypress.log({ name: "startHomeserver", message: `Started mailhog instance ${x.containerId}` });
+        return {
+            api: mailhog({
+                host: "localhost",
+                port: x.httpPort,
+            }),
+            instance: x,
+        };
+    });
+});
+
+Cypress.Commands.add("stopMailhog", (mailhog: Mailhog): Chainable<void> => {
+    return cy.task("mailhogStop", mailhog.instance.containerId);
+});