snapshot of https://github.com/mattermost/mattermost.git (master, 2026-09-16; blobs > 131072B omitted)

e2e-tests/playwright/specs/functional/channels/messaging/link_preview_removal.spec.ts

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {setupFileServer, test} from '@mattermost/playwright-lib';
+
+let fileServerUrl: string;
+setupFileServer().then((serverUrl) => {
+    fileServerUrl = serverUrl;
+});
+
+/**
+ * @objective Verify collapsing a link preview is user-specific while removing it removes the preview for other users.
+ */
+test('MM-T199 Removing a link preview removes it from the views of other users', {tag: '@messaging'}, async ({pw}) => {
+    const {adminClient, adminUser, userClient, team, user} = await pw.initSetup();
+
+    // Use the in-repo OpenGraph fixture instead of a live third-party URL so preview
+    // generation does not depend on an external site remaining scrapeable.
+    await adminClient.patchConfig({
+        ServiceSettings: {
+            EnableLinkPreviews: true,
+            AllowedUntrustedInternalConnections: new URL(fileServerUrl).hostname,
+        },
+    });
+
+    await Promise.all([
+        userClient.savePreferences(user.id, [
+            {user_id: user.id, category: 'display_settings', name: 'link_previews', value: 'true'},
+            {user_id: user.id, category: 'display_settings', name: 'collapse_previews', value: 'false'},
+        ]),
+        adminClient.savePreferences(adminUser.id, [
+            {user_id: adminUser.id, category: 'display_settings', name: 'link_previews', value: 'true'},
+            {user_id: adminUser.id, category: 'display_settings', name: 'collapse_previews', value: 'false'},
+        ]),
+    ]);
+    const message = `${fileServerUrl}/opengraph-huge.html`;
+
+    // # Log in as the test user, post a link, and wait for its preview
+    const {channelsPage: userChannelsPage, page: userPage} = await pw.testBrowser.login(user);
+    await userChannelsPage.goto(team.name, 'off-topic');
+    await userChannelsPage.toBeVisible();
+    const postResponsePromise = userPage.waitForResponse(
+        (response) => response.url().endsWith('/api/v4/posts') && response.request().method() === 'POST',
+    );
+    await userChannelsPage.postMessage(message);
+    const postId = ((await (await postResponsePromise).json()) as {id: string}).id;
+    const userPost = await userChannelsPage.centerView.getPostById(postId);
+    const userPreview = userPost.getLinkPreview();
+
+    // * Verify the link preview and its image are shown
+    await userPreview.toBeVisible(pw.duration.half_min);
+    await userPreview.toHaveExpandedImage();
+
+    // # Log in as the other user and visit the same channel
+    const {channelsPage: adminChannelsPage, page: adminPage} = await pw.testBrowser.login(adminUser);
+    await adminChannelsPage.goto(team.name, 'off-topic');
+    await adminChannelsPage.toBeVisible();
+    const adminPost = await adminChannelsPage.centerView.getPostById(postId);
+    const adminPreview = adminPost.getLinkPreview();
+
+    // * Verify the other user also sees the expanded preview
+    await adminPreview.toBeVisible(pw.duration.half_min);
+    await adminPreview.toHaveExpandedImage();
+
+    // # Collapse the preview as the test user
+    await userPreview.hideImage();
+
+    // # Reload the channel as the other user
+    await adminPage.reload();
+    await adminChannelsPage.toBeVisible();
+
+    // * Verify the preview remains expanded for the other user
+    await adminPreview.toHaveExpandedImage();
+
+    // # Remove the link preview as the test user
+    await userPage.reload();
+    await userChannelsPage.toBeVisible();
+    await userPreview.remove();
+
+    // # Reload the channel as the other user
+    await adminPage.reload();
+    await adminChannelsPage.toBeVisible();
+
+    // * Verify the preview is also removed for the other user
+    await adminPreview.toNotBeVisible();
+});