Cypress: skip tests known to fail when using Rust crypto (#10873)

* Cypress: skip tests known to fail when using Rust crypto

... which means we can then run the cypress test suite against Element Web R to
check we aren't introducing regressions.

* Update cypress/e2e/register/register.spec.ts

* Use env var to detect rust crypto

* Hoist `skipIfRustCrypto` call earlier

cypress/e2e/crypto/complete-security.spec.ts

@@ -18,6 +18,7 @@ import type { VerificationRequest } from "matrix-js-sdk/src/crypto/verification/
 import { HomeserverInstance } from "../../plugins/utils/homeserver";
 import { handleVerificationRequest, waitForVerificationRequest } from "./utils";
 import { CypressBot } from "../../support/bot";
+import { skipIfRustCrypto } from "../../support/util";
 
 describe("Complete security", () => {
     let homeserver: HomeserverInstance;
@@ -46,6 +47,8 @@ describe("Complete security", () => {
     });
 
     it("should walk through device verification if we have a signed device", () => {
+        skipIfRustCrypto();
+
         // create a new user, and have it bootstrap cross-signing
         let botClient: CypressBot;
         cy.getBot(homeserver, { displayName: "Jeff" })

cypress/e2e/crypto/crypto.spec.ts

@@ -20,6 +20,7 @@ import type { CypressBot } from "../../support/bot";
 import { HomeserverInstance } from "../../plugins/utils/homeserver";
 import { UserCredentials } from "../../support/login";
 import { EmojiMapping, handleVerificationRequest, waitForVerificationRequest } from "./utils";
+import { skipIfRustCrypto } from "../../support/util";
 
 interface CryptoTestContext extends Mocha.Context {
     homeserver: HomeserverInstance;
@@ -152,6 +153,7 @@ describe("Cryptography", function () {
     });
 
     it("setting up secure key backup should work", () => {
+        skipIfRustCrypto();
         cy.openUserSettings("Security & Privacy");
         cy.findByRole("button", { name: "Set up Secure Backup" }).click();
         cy.get(".mx_Dialog").within(() => {
@@ -175,6 +177,7 @@ describe("Cryptography", function () {
     });
 
     it("creating a DM should work, being e2e-encrypted / user verification", function (this: CryptoTestContext) {
+        skipIfRustCrypto();
         cy.bootstrapCrossSigning(aliceCredentials);
         startDMWithBob.call(this);
         // send first message
@@ -196,6 +199,7 @@ describe("Cryptography", function () {
     });
 
     it("should allow verification when there is no existing DM", function (this: CryptoTestContext) {
+        skipIfRustCrypto();
         cy.bootstrapCrossSigning(aliceCredentials);
         autoJoin(this.bob);
 
@@ -214,6 +218,7 @@ describe("Cryptography", function () {
     });
 
     it("should show the correct shield on edited e2e events", function (this: CryptoTestContext) {
+        skipIfRustCrypto();
         cy.bootstrapCrossSigning(aliceCredentials);
 
         // bob has a second, not cross-signed, device

cypress/e2e/crypto/decryption-failure.spec.ts

@@ -19,6 +19,7 @@ import type { MatrixClient } from "matrix-js-sdk/src/matrix";
 import { HomeserverInstance } from "../../plugins/utils/homeserver";
 import { UserCredentials } from "../../support/login";
 import { handleVerificationRequest } from "./utils";
+import { skipIfRustCrypto } from "../../support/util";
 
 const ROOM_NAME = "Test room";
 const TEST_USER = "Alia";
@@ -67,6 +68,7 @@ describe("Decryption Failure Bar", () => {
     let roomId: string;
 
     beforeEach(function () {
+        skipIfRustCrypto();
         cy.startHomeserver("default").then((hs: HomeserverInstance) => {
             homeserver = hs;
             cy.initTestUser(homeserver, TEST_USER)

cypress/support/config.json.ts

@@ -20,6 +20,8 @@ limitations under the License.
  * we make requests to the live `matrix.org`, which makes our tests dependent on matrix.org being up and responsive.
  */
 
+import { isRustCryptoEnabled } from "./util";
+
 const CONFIG_JSON = {
     // This is deliberately quite a minimal config.json, so that we can test that the default settings
     // actually work.
@@ -40,7 +42,7 @@ beforeEach(() => {
     const configJson = CONFIG_JSON;
 
     // configure element to use rust crypto if the env var tells us so
-    if (Cypress.env("RUST_CRYPTO")) {
+    if (isRustCryptoEnabled()) {
         configJson["features"] = {
             feature_rust_crypto: true,
         };

cypress/support/util.ts

@@ -56,5 +56,20 @@ cy.all = function all(commands): Cypress.Chainable {
     return cy.wrap(resultArray, { log: false });
 };
 
-// Needed to make this file a module
-export {};
+/**
+ * Check if Cypress has been configured to enable rust crypto, and bail out if so.
+ */
+export function skipIfRustCrypto() {
+    if (isRustCryptoEnabled()) {
+        cy.log("Skipping due to rust crypto");
+        //@ts-ignore: 'state' is a secret internal command
+        cy.state("runnable").skip();
+    }
+}
+
+/**
+ * Determine if Cypress has been configured to enable rust crypto (by checking the environment variable)
+ */
+export function isRustCryptoEnabled(): boolean {
+    return !!Cypress.env("RUST_CRYPTO");
+}