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

e2e-tests/cypress/tests/integration/channels/websocket/channel_created/new_sidebar_spec.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. # Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+// Stage: @prod
+// Group: @channels @websocket
+
+import {getRandomId} from '@/utils';
+
+describe('Handle removed user - new sidebar', () => {
+    it('MM-27202 should add new channels to the sidebar when created from another session', () => {
+        // # Start with a new team
+        const teamName = `team-${getRandomId()}`;
+        cy.createNewTeam(teamName, teamName);
+
+        // * Verify that we've switched to the new team
+        cy.uiGetLHSHeader().findByText(teamName);
+
+        // # Create a new channel from another session
+        const channelName = `channel-${getRandomId()}`;
+        cy.apiGetTeamByName(teamName).then(({team}) => {
+            cy.apiCreateChannel(team.id, channelName, channelName, 'O', '', '', false);
+        });
+
+        // Verify that the new channel is in the sidebar
+        cy.get(`#sidebarItem_${channelName}`).should('be.visible');
+    });
+});

e2e-tests/cypress/tests/integration/channels/websocket/channel_created/old_sidebar_spec.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. # Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+// Stage: @prod
+// Group: @channels @websocket
+
+import {getRandomId} from '@/utils';
+
+describe('Handle removed user - new sidebar', () => {
+    it('MM-27202 should add new channels to the sidebar when created from another session', () => {
+        // # Start with a new team
+        const teamName = `team-${getRandomId()}`;
+        cy.createNewTeam(teamName, teamName);
+
+        // * Verify that we've switched to the new team
+        cy.uiGetLHSHeader().findByText(teamName);
+
+        // # Create a new channel from another session
+        const channelName = `channel-${getRandomId()}`;
+        cy.apiGetTeamByName(teamName).then(({team}) => {
+            cy.apiCreateChannel(team.id, channelName, channelName, 'O', '', '', false);
+        });
+
+        // Verify that the new channel is in the sidebar
+        cy.get(`#sidebarItem_${channelName}`).should('be.visible');
+    });
+});

e2e-tests/cypress/tests/integration/channels/websocket/handle_new_post_spec.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. # Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+// Stage: @prod
+// Group: @channels @websocket
+
+import {beRead, beUnread} from '@/support/assertions';
+import {getAdminAccount} from '@/support/env';
+import {getRandomId} from '@/utils';
+
+describe('Handle new post', () => {
+    const admin = getAdminAccount();
+    let channel1;
+    let team1;
+    let user1;
+
+    before(() => {
+        cy.apiInitSetup().then(({channel, team, user}) => {
+            channel1 = channel;
+            team1 = team;
+            user1 = user;
+
+            cy.apiLogin(user1);
+            cy.visit(`/${team.name}/channels/town-square`);
+        });
+    });
+
+    it.skip('MM-T4609 - should mark channel as unread when a message is sent in another channel', () => {
+        // # Explicitly click over to the test channel from Town Square
+        // # to dismiss the unread + badge from adding `user` to the channel
+        cy.get(`#sidebarItem_${channel1.name}`).click();
+
+        // * Verify those are now gone
+        cy.get(`#sidebarItem_${channel1.name}`).should(beRead);
+        cy.get(`#sidebarItem_${channel1.name} .badge`).should('not.exist');
+
+        // # Switch back to Town Square
+        cy.get('#sidebarItem_town-square').click();
+
+        // # Have another user post in the test channel
+        cy.postMessageAs({sender: admin, message: 'post', channelId: channel1.id});
+
+        // * Verify that the channel is now unread
+        cy.get(`#sidebarItem_${channel1.name}`).should(beUnread);
+        cy.get(`#sidebarItem_${channel1.name} .badge`).should('not.exist');
+    });
+
+    it.skip('MM-T4610 - should show the mention badge when a mention is sent in another channel', () => {
+        // # Explicitly click over to the test channel from Town Square
+        // # to dismiss the unread + badge from the end of the previous test
+        // # (maybe should use a new channel but then the same thing has to be done
+        // # for that anyways)
+        cy.get(`#sidebarItem_${channel1.name}`).click();
+
+        cy.get(`#sidebarItem_${channel1.name}`).should(beRead);
+        cy.get(`#sidebarItem_${channel1.name} .badge`).should('not.exist');
+
+        // # Switch back to Town Square
+        cy.get('#sidebarItem_town-square').click();
+
+        // # Have another user post in the test channel
+        cy.postMessageAs({sender: admin, message: `@${user1.username}`, channelId: channel1.id});
+
+        // * Verify that the channel is now unread with one mention
+        cy.get(`#sidebarItem_${channel1.name}`).should(beUnread);
+        cy.get(`#sidebarItem_${channel1.name} .badge`).should('exist').contains('1');
+
+        // # And have them post again
+        cy.postMessageAs({sender: admin, message: `@${user1.username}`, channelId: channel1.id});
+
+        // * Verify that the channel is now unread with two mentions
+        cy.get(`#sidebarItem_${channel1.name}`).should(beUnread);
+        cy.get(`#sidebarItem_${channel1.name} .badge`).should('exist').contains('2');
+    });
+
+    it('MM-T2015 - should show the mention badge when added to another channel', () => {
+        const baseUrl = Cypress.config('baseUrl');
+
+        // # Have another user create a new channel
+        const channelName = 'channel_' + getRandomId();
+        cy.externalRequest({
+            user: admin,
+            baseUrl,
+            method: 'post',
+            path: 'channels',
+            data: {
+                display_name: channelName,
+                name: channelName,
+                team_id: team1.id,
+                type: 'O',
+            },
+        }).then((response) => {
+            expect(response.status).to.equal(201);
+
+            const channel = response.data;
+
+            // # And then invite the current user
+            cy.externalAddUserToChannel(user1.id, channel.id);
+        });
+
+        // * Verify that the channel is in the current user's sidebar and is unread with one mention
+        cy.get(`#sidebarItem_${channelName}`).should(beUnread);
+        cy.get(`#sidebarItem_${channelName} .badge`).should('exist').contains('1');
+    });
+
+    it('MM-25452 should only show one mention added to another channel with network lag', () => {
+        const baseUrl = Cypress.config('baseUrl');
+
+        // # Have another user create a new channel
+        const channelName = 'channel_' + getRandomId();
+        cy.externalRequest({
+            user: admin,
+            baseUrl,
+            method: 'post',
+            path: 'channels',
+            data: {
+                display_name: channelName,
+                name: channelName,
+                team_id: team1.id,
+                type: 'O',
+            },
+        }).then((response) => {
+            expect(response.status).to.equal(201);
+
+            const channel = response.data;
+
+            // # Add a small delay to the request to fetch the channel
+            cy.delayRequestToRoutes([`channels/${channel.id}`], 100);
+
+            // # And then invite the current user
+            cy.externalAddUserToChannel(user1.id, channel.id);
+        });
+
+        // * Verify that the channel is in the current user's sidebar and is unread with one mention
+        cy.get(`#sidebarItem_${channelName}`).should(beUnread);
+        cy.get(`#sidebarItem_${channelName} .badge`).should('exist').contains('1');
+    });
+});

e2e-tests/cypress/tests/integration/channels/websocket/handle_removed_user/helpers.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. # Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+export function createNewTeamAndMoveToOffTopic(teamName, sidebarItemClass) {
+    // # Start with a new team
+    cy.createNewTeam(teamName, teamName);
+
+    // * Verify that we've switched to the new team
+    cy.uiGetLHSHeader().findByText(teamName);
+
+    // # Click on Off Topic
+    cy.get(`${sidebarItemClass}:contains(Off-Topic)`).should('be.visible').click();
+
+    // * Verify that the channel changed
+    cy.url().should('include', `/${teamName}/channels/off-topic`);
+    cy.get('#channelHeaderTitle').should('be.visible').should('contain', 'Off-Topic');
+}
+
+export function removeMeFromCurrentChannel() {
+    // # Remove the Guest User from channel
+    let channelId;
+    return cy.getCurrentChannelId().then((res) => {
+        channelId = res;
+        return cy.apiGetMe();
+    }).then(({user}) => {
+        return cy.removeUserFromChannel(channelId, user.id);
+    });
+}
+
+export function verifyRHS(teamName, sidebarItemClass, postId) {
+    // # Dismiss the modal informing the user they were kicked out
+    cy.get('#removedChannelBtn').click();
+
+    // * Verify that the channel changed back to Town Square
+    cy.url().should('include', `/${teamName}/channels/town-square`);
+    cy.get('#channelHeaderTitle').should('be.visible').should('contain', 'Town Square');
+
+    // * Verify that Off-Topic has been removed
+    cy.get(`${sidebarItemClass}:contains(Off-Topic)`).should('not.exist');
+
+    // * Verify that the recently posted message is no longer in the RHS
+    cy.get(`#rhsPostMessageText_${postId}`).should('not.exist');
+}
+
+export function shouldRemoveMentionsInRHS(teamName, sidebarItemClass) {
+    let postId;
+
+    // # Post a unique message with a mention and retrieve its ID
+    cy.apiGetMe().then(({user}) => {
+        const messageText = `${Date.now()} - mention to @${user.username} `;
+        cy.postMessage(messageText);
+
+        return cy.getLastPostId();
+    }).then((lastPostId) => {
+        postId = lastPostId;
+
+        // # Click on the Recent Mentions button to open the RHS
+        cy.uiGetRecentMentionButton().click();
+
+        // * Verify that the recently posted message is shown in the RHS
+        cy.get(`#rhsPostMessageText_${postId}`).should('exist');
+
+        return removeMeFromCurrentChannel();
+    }).then(() => {
+        verifyRHS(teamName, sidebarItemClass, postId);
+    });
+}
+
+export function shouldRemoveSavedPostsInRHS(teamName, sidebarItemClass) {
+    let postId;
+
+    // # Post a unique message and retrieve its ID
+    const messageText = `${Date.now()} - post to save`;
+    cy.postMessage(messageText);
+
+    cy.getLastPostId().then((lastPostId) => {
+        postId = lastPostId;
+
+        // # Save the last post
+        cy.clickPostSaveIcon(postId);
+
+        // # Click on the Saved Posts button to open the RHS
+        cy.uiGetSavedPostButton().click();
+
+        // * Verify that the recently posted message is shown in the RHS
+        cy.get(`#rhsPostMessageText_${postId}`).should('exist');
+
+        return removeMeFromCurrentChannel();
+    }).then(() => {
+        verifyRHS(teamName, sidebarItemClass, postId);
+    });
+}

e2e-tests/cypress/tests/integration/channels/websocket/handle_removed_user/new_sidebar_spec.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+// ***************************************************************
+// - [#] indicates a test step (e.g. # Go to a page)
+// - [*] indicates an assertion (e.g. * Check the title)
+// - Use element ID when selecting an element. Create one if none.
+// ***************************************************************
+
+// Stage: @prod
+// Group: @channels @websocket
+
+import {
+    createNewTeamAndMoveToOffTopic,
+    removeMeFromCurrentChannel,
+    shouldRemoveSavedPostsInRHS,
+    shouldRemoveMentionsInRHS,
+} from './helpers';
+
+import {getRandomId} from '@/utils';
+
+describe('Handle removed user - new sidebar', () => {
+    const sidebarItemClass = '.SidebarChannel';
+
+    before(() => {
+        cy.apiInitSetup({loginAfter: true}).then(({team, channel}) => {
+            cy.visit(`/${team.name}/channels/${channel.name}`);
+        });
+    });
+
+    it('should be redirected to last channel when a user is removed from their current channel', () => {
+        const teamName = `team-${getRandomId()}`;
+        createNewTeamAndMoveToOffTopic(teamName, sidebarItemClass);
+
+        removeMeFromCurrentChannel().then(() => {
+            // * Verify that the channel changed back to Town Square
+            cy.url().should('include', `/${teamName}/channels/town-square`);
+            cy.get('#channelHeaderTitle').should('be.visible').should('contain', 'Town Square');
+        });
+    });
+
+    it('should remove mentions from RHS', () => {
+        const teamName = `team-${getRandomId()}`;
+        createNewTeamAndMoveToOffTopic(teamName, sidebarItemClass);
+        shouldRemoveMentionsInRHS(teamName, sidebarItemClass);
+    });
+
+    it('should remove saved posts from RHS', () => {
+        const teamName = `team-${getRandomId()}`;
+        createNewTeamAndMoveToOffTopic(teamName, sidebarItemClass);
+        shouldRemoveSavedPostsInRHS(teamName, sidebarItemClass);
+    });
+});