Fix flaky playwright tests (#28959)

* Fix playwright flaky tests

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Wipe mailhog between test runs

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Delint

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

docs/playwright.md

@@ -77,6 +77,9 @@ test.use({
 ```
 
 The appropriate homeserver will be launched by the Playwright worker and reused for all tests which match the worker configuration.
+Due to homeservers being reused between tests, please use unique names for any rooms put into the room directory as
+they may be visible from other tests, the suggested approach is to use `testInfo.testId` within the name or lodash's uniqueId.
+We remove public rooms from the room directory between tests but deleting users doesn't have a homeserver agnostic solution.
 The logs from testcontainers will be attached to any reports output from Playwright.
 
 ## Writing Tests

playwright/e2e/forgot-password/forgot-password.spec.ts

@@ -6,16 +6,25 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
 Please see LICENSE files in the repository root for full details.
 */
 
-import { expect, test } from "../../element-web-test";
+import { expect, test as base } from "../../element-web-test";
 import { selectHomeserver } from "../utils";
 import { emailHomeserver } from "../../plugins/homeserver/synapse/emailHomeserver.ts";
 import { isDendrite } from "../../plugins/homeserver/dendrite";
+import { Credentials } from "../../plugins/homeserver";
 
-const username = "user1234";
-// this has to be password-like enough to please zxcvbn. Needless to say it's just from pwgen.
-const password = "oETo7MPf0o";
 const email = "user@nowhere.dummy";
 
+const test = base.extend<{ credentials: Pick<Credentials, "username" | "password"> }>({
+    // eslint-disable-next-line no-empty-pattern
+    credentials: async ({}, use, testInfo) => {
+        await use({
+            username: `user_${testInfo.testId}`,
+            // this has to be password-like enough to please zxcvbn. Needless to say it's just from pwgen.
+            password: "oETo7MPf0o",
+        });
+    },
+});
+
 test.use(emailHomeserver);
 test.use({
     config: {
@@ -45,31 +54,35 @@ test.describe("Forgot Password", () => {
         await expect(page.getByRole("main")).toMatchScreenshot("forgot-password.png");
     });
 
-    test("renders email verification dialog properly", { tag: "@screenshot" }, async ({ page, homeserver }) => {
-        const user = await homeserver.registerUser(username, password);
+    test(
+        "renders email verification dialog properly",
+        { tag: "@screenshot" },
+        async ({ page, homeserver, credentials }) => {
+            const user = await homeserver.registerUser(credentials.username, credentials.password);
 
-        await homeserver.setThreepid(user.userId, "email", email);
+            await homeserver.setThreepid(user.userId, "email", email);
 
-        await page.goto("/");
+            await page.goto("/");
 
-        await page.getByRole("link", { name: "Sign in" }).click();
-        await selectHomeserver(page, homeserver.baseUrl);
+            await page.getByRole("link", { name: "Sign in" }).click();
+            await selectHomeserver(page, homeserver.baseUrl);
 
-        await page.getByRole("button", { name: "Forgot password?" }).click();
+            await page.getByRole("button", { name: "Forgot password?" }).click();
 
-        await page.getByRole("textbox", { name: "Email address" }).fill(email);
+            await page.getByRole("textbox", { name: "Email address" }).fill(email);
 
-        await page.getByRole("button", { name: "Send email" }).click();
+            await page.getByRole("button", { name: "Send email" }).click();
 
-        await page.getByRole("button", { name: "Next" }).click();
+            await page.getByRole("button", { name: "Next" }).click();
 
-        await page.getByRole("textbox", { name: "New Password", exact: true }).fill(password);
-        await page.getByRole("textbox", { name: "Confirm new password", exact: true }).fill(password);
+            await page.getByRole("textbox", { name: "New Password", exact: true }).fill(credentials.password);
+            await page.getByRole("textbox", { name: "Confirm new password", exact: true }).fill(credentials.password);
 
-        await page.getByRole("button", { name: "Reset password" }).click();
+            await page.getByRole("button", { name: "Reset password" }).click();
 
-        await expect(page.getByRole("button", { name: "Resend" })).toBeInViewport();
+            await expect(page.getByRole("button", { name: "Resend" })).toBeInViewport();
 
-        await expect(page.locator(".mx_Dialog")).toMatchScreenshot("forgot-password-verify-email.png");
-    });
+            await expect(page.locator(".mx_Dialog")).toMatchScreenshot("forgot-password-verify-email.png");
+        },
+    );
 });

playwright/e2e/login/login-consent.spec.ts

@@ -77,6 +77,9 @@ async function login(page: Page, homeserver: HomeserverInstance, credentials: Cr
     await page.getByRole("button", { name: "Sign in" }).click();
 }
 
+// This test suite uses the same userId for all tests in the suite
+// due to DEVICE_SIGNING_KEYS_BODY being specific to that userId,
+// so we restart the Synapse container to make it forget everything.
 test.use(consentHomeserver);
 test.use({
     config: {
@@ -97,6 +100,9 @@ test.use({
             ...credentials,
             displayName,
         });
+
+        // Restart the homeserver to wipe its in-memory db so we can reuse the same user ID without cross-signing prompts
+        await homeserver.restart();
     },
 });
 

playwright/e2e/oidc/index.ts

@@ -33,7 +33,7 @@ export async function registerAccountMas(
         expect(messages.items).toHaveLength(1);
     }).toPass();
     expect(messages.items[0].to).toEqual(`${username} <${email}>`);
-    const [code] = messages.items[0].text.match(/(\d{6})/);
+    const [, code] = messages.items[0].text.match(/Your verification code to confirm this email address is: (\d{6})/);
 
     await page.getByRole("textbox", { name: "6-digit code" }).fill(code);
     await page.getByRole("button", { name: "Continue" }).click();

playwright/e2e/oidc/oidc-native.spec.ts

@@ -17,7 +17,15 @@ test.describe("OIDC Native", { tag: ["@no-firefox", "@no-webkit"] }, () => {
     test.skip(isDendrite, "does not yet support MAS");
     test.slow(); // trace recording takes a while here
 
-    test("can register the oauth2 client and an account", async ({ context, page, homeserver, mailhogClient, mas }) => {
+    test("can register the oauth2 client and an account", async ({
+        context,
+        page,
+        homeserver,
+        mailhogClient,
+        mas,
+    }, testInfo) => {
+        await page.clock.install();
+
         const tokenUri = `${mas.baseUrl}/oauth2/token`;
         const tokenApiPromise = page.waitForRequest(
             (request) => request.url() === tokenUri && request.postDataJSON()["grant_type"] === "authorization_code",
@@ -25,11 +33,14 @@ test.describe("OIDC Native", { tag: ["@no-firefox", "@no-webkit"] }, () => {
 
         await page.goto("/#/login");
         await page.getByRole("button", { name: "Continue" }).click();
-        await registerAccountMas(page, mailhogClient, "alice", "alice@email.com", "Pa$sW0rD!");
+
+        const userId = `alice_${testInfo.testId}`;
+        await registerAccountMas(page, mailhogClient, userId, "alice@email.com", "Pa$sW0rD!");
 
         // Eventually, we should end up at the home screen.
         await expect(page).toHaveURL(/\/#\/home$/, { timeout: 10000 });
-        await expect(page.getByRole("heading", { name: "Welcome alice", exact: true })).toBeVisible();
+        await expect(page.getByRole("heading", { name: `Welcome ${userId}`, exact: true })).toBeVisible();
+        await page.clock.runFor(20000); // run the timer so we see the token request
 
         const tokenApiRequest = await tokenApiPromise;
         expect(tokenApiRequest.postDataJSON()["grant_type"]).toBe("authorization_code");

playwright/e2e/one-to-one-chat/one-to-one-chat.spec.ts

@@ -17,8 +17,8 @@ const test = base.extend<{
 test.describe("1:1 chat room", () => {
     test.use({
         displayName: "Jeff",
-        user2: async ({ homeserver }, use) => {
-            const credentials = await homeserver.registerUser("user1234", "p4s5W0rD", "Timmy");
+        user2: async ({ homeserver }, use, testInfo) => {
+            const credentials = await homeserver.registerUser(`user2_${testInfo.testId}`, "p4s5W0rD", "Timmy");
             await use(credentials);
         },
     });

playwright/e2e/share-dialog/share-dialog.spec.ts

@@ -23,7 +23,7 @@ test.describe("Share dialog", () => {
 
         const dialog = page.getByRole("dialog", { name: "Share room" });
         await expect(dialog.getByText(`https://matrix.to/#/${room.roomId}`)).toBeVisible();
-        expect(dialog).toMatchScreenshot("share-dialog-room.png", {
+        await expect(dialog).toMatchScreenshot("share-dialog-room.png", {
             // QRCode and url changes at every run
             mask: [page.locator(".mx_QRCode"), page.locator(".mx_ShareDialog_top > span")],
         });
@@ -40,7 +40,7 @@ test.describe("Share dialog", () => {
 
         const dialog = page.getByRole("dialog", { name: "Share User" });
         await expect(dialog.getByText(`https://matrix.to/#/${user.userId}`)).toBeVisible();
-        expect(dialog).toMatchScreenshot("share-dialog-user.png", {
+        await expect(dialog).toMatchScreenshot("share-dialog-user.png", {
             // QRCode changes at every run
             mask: [page.locator(".mx_QRCode")],
         });
@@ -57,7 +57,7 @@ test.describe("Share dialog", () => {
 
         const dialog = page.getByRole("dialog", { name: "Share Room Message" });
         await expect(dialog.getByRole("checkbox", { name: "Link to selected message" })).toBeChecked();
-        expect(dialog).toMatchScreenshot("share-dialog-event.png", {
+        await expect(dialog).toMatchScreenshot("share-dialog-event.png", {
             // QRCode and url changes at every run
             mask: [page.locator(".mx_QRCode"), page.locator(".mx_ShareDialog_top > span")],
         });

playwright/e2e/sliding-sync/sliding-sync.spec.ts

@@ -108,7 +108,6 @@ test.describe("Sliding Sync", () => {
         await page.getByRole("menuitemradio", { name: "A-Z" }).dispatchEvent("click");
         await expect(page.locator(".mx_StyledRadioButton_checked").getByText("A-Z")).toBeVisible();
 
-        await page.pause();
         await checkOrder(["Apple", "Orange", "Pineapple", "Test Room"], page);
     });
 

playwright/services.ts

@@ -7,22 +7,25 @@ Please see LICENSE files in the repository root for full details.
 
 import { test as base } from "@playwright/test";
 import mailhog from "mailhog";
-import { GenericContainer, Network, StartedNetwork, StartedTestContainer, Wait } from "testcontainers";
+import { Network, StartedNetwork } from "testcontainers";
 import { PostgreSqlContainer, StartedPostgreSqlContainer } from "@testcontainers/postgresql";
 
 import { SynapseConfigOptions, SynapseContainer } from "./testcontainers/synapse.ts";
 import { ContainerLogger } from "./testcontainers/utils.ts";
 import { StartedMatrixAuthenticationServiceContainer } from "./testcontainers/mas.ts";
 import { HomeserverContainer, StartedHomeserverContainer } from "./testcontainers/HomeserverContainer.ts";
+import { MailhogContainer, StartedMailhogContainer } from "./testcontainers/mailhog.ts";
+
+interface TestFixtures {
+    mailhogClient: mailhog.API;
+}
 
 export interface Services {
     logger: ContainerLogger;
 
     network: StartedNetwork;
     postgres: StartedPostgreSqlContainer;
-
-    mailhog: StartedTestContainer;
-    mailhogClient: mailhog.API;
+    mailhog: StartedMailhogContainer;
 
     synapseConfigOptions: SynapseConfigOptions;
     _homeserver: HomeserverContainer<any>;
@@ -30,7 +33,7 @@ export interface Services {
     mas?: StartedMatrixAuthenticationServiceContainer;
 }
 
-export const test = base.extend<{}, Services>({
+export const test = base.extend<TestFixtures, Services>({
     logger: [
         // eslint-disable-next-line no-empty-pattern
         async ({}, use) => {
@@ -79,24 +82,20 @@ export const test = base.extend<{}, Services>({
 
     mailhog: [
         async ({ logger, network }, use) => {
-            const container = await new GenericContainer("mailhog/mailhog:latest")
+            const container = await new MailhogContainer()
                 .withNetwork(network)
                 .withNetworkAliases("mailhog")
-                .withExposedPorts(8025)
                 .withLogConsumer(logger.getConsumer("mailhog"))
-                .withWaitStrategy(Wait.forListeningPorts())
                 .start();
             await use(container);
             await container.stop();
         },
         { scope: "worker" },
     ],
-    mailhogClient: [
-        async ({ mailhog: container }, use) => {
-            await use(mailhog({ host: container.getHost(), port: container.getMappedPort(8025) }));
-        },
-        { scope: "worker" },
-    ],
+    mailhogClient: async ({ mailhog: container }, use) => {
+        await use(container.client);
+        await container.client.deleteAll();
+    },
 
     synapseConfigOptions: [{}, { option: true, scope: "worker" }],
     _homeserver: [

playwright/testcontainers/mailhog.ts

@@ -0,0 +1,30 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { AbstractStartedContainer, GenericContainer, StartedTestContainer, Wait } from "testcontainers";
+import mailhog from "mailhog";
+
+export class MailhogContainer extends GenericContainer {
+    constructor() {
+        super("mailhog/mailhog:latest");
+
+        this.withExposedPorts(8025).withWaitStrategy(Wait.forListeningPorts());
+    }
+
+    public override async start(): Promise<StartedMailhogContainer> {
+        return new StartedMailhogContainer(await super.start());
+    }
+}
+
+export class StartedMailhogContainer extends AbstractStartedContainer {
+    public readonly client: mailhog.API;
+
+    constructor(container: StartedTestContainer) {
+        super(container);
+        this.client = mailhog({ host: container.getHost(), port: container.getMappedPort(8025) });
+    }
+}