Move threads e2e tests over to cypress (#8501)

* Add non-consent (default) Synapse template

* Add consent test

* Add create room test

* Stash work

* Initial threads tests

* fix

* Delete old threads e2e tests, plan new ones

* Fix typed s'more

* Try something else

* specify d.ts

* Fix types once and for all?

* Fix the consent tests

* Iterate threads test harness

* Fix dispatcher types

* Iterate threads test

* fix typing

* Alternative import attempt

* let it break let it break let it break

* Tweak types

* Stash

* delint and update docs

* null-guard scrollIntoView

* Iterate threads test

* Apply suggestions from code review

cypress/integration/2-login/consent.spec.ts

@@ -0,0 +1,73 @@
+/*
+Copyright 2022 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 { SinonStub } from "cypress/types/sinon";
+
+import { SynapseInstance } from "../../plugins/synapsedocker";
+
+describe("Consent", () => {
+    let synapse: SynapseInstance;
+
+    beforeEach(() => {
+        cy.startSynapse("consent").then(data => {
+            synapse = data;
+
+            cy.initTestUser(synapse, "Bob");
+        });
+    });
+
+    afterEach(() => {
+        cy.stopSynapse(synapse);
+    });
+
+    it("should prompt the user to consent to terms when server deems it necessary", () => {
+        // Attempt to create a room using the js-sdk which should return an error with `M_CONSENT_NOT_GIVEN`
+        cy.window().then(win => {
+            win.mxMatrixClientPeg.matrixClient.createRoom({}).catch(() => {});
+
+            // Stub `window.open` - clicking the primary button below will call it
+            cy.stub(win, "open").as("windowOpen").returns({});
+        });
+
+        // Accept terms & conditions
+        cy.get(".mx_QuestionDialog").within(() => {
+            cy.get("#mx_BaseDialog_title").contains("Terms and Conditions");
+            cy.get(".mx_Dialog_primary").click();
+        });
+
+        cy.get<SinonStub>("@windowOpen").then(stub => {
+            const url = stub.getCall(0).args[0];
+
+            // Go to Synapse's consent page and accept it
+            cy.origin(synapse.baseUrl, { args: { url } }, ({ url }) => {
+                cy.visit(url);
+
+                cy.get('[type="submit"]').click();
+                cy.get("p").contains("Danke schon");
+            });
+        });
+
+        // go back to the app
+        cy.visit("/");
+        // wait for the app to re-load
+        cy.get(".mx_MatrixChat", { timeout: 15000 });
+
+        // attempt to perform the same action again and expect it to not fail
+        cy.createRoom({});
+    });
+});