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

e2e-tests/cypress/tests/integration/channels/performance/channel_switch_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.
+// ***************************************************************
+
+// Group: @channels @channel
+
+import {measurePerformance} from './utils.js';
+
+describe('Channel switch performance test', () => {
+    let teamName;
+
+    before(() => {
+        cy.apiInitSetup({loginAfter: true}).then(({team}) => {
+            teamName = team;
+
+            // # Go to town square
+            cy.visit(`/${team.name}/channels/town-square`);
+            cy.get('#sidebarItem_off-topic').should('be.visible');
+        });
+    });
+
+    it('measures switching between two channels from LHS', () => {
+        measurePerformance(
+            'channelLoad',
+            800,
+            () => {
+                // # Switch channel to Off-topic
+
+                cy.get('#sidebarItem_off-topic').click({force: true});
+
+                // * Expect that the user is now in Off-Topic
+                return expectActiveChannelToBe('Off-Topic', '/off-topic');
+            },
+
+            // # Reset test run so we can start on the initially specified channel
+            () => {
+                cy.visit(`/${teamName.name}/channels/town-square`);
+                cy.get('#sidebarItem_off-topic').should('be.visible');
+            },
+        );
+    });
+});
+
+const expectActiveChannelToBe = (title, url) => {
+    // * Expect channel title to match title passed in argument
+    cy.get('#channelHeaderTitle').
+        should('be.visible').
+        and('contain.text', title);
+
+    // * Expect that center channel is visible and page has loaded
+    cy.get('#app-content').should('be.visible');
+
+    // * Expect url to match url passed in argument
+    return cy.url().should('contain', url);
+};

e2e-tests/cypress/tests/integration/channels/performance/team_switch_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.
+// ***************************************************************
+
+import {measurePerformance} from './utils.js';
+
+describe('Team switch performance test', () => {
+    let testTeam1;
+    let testTeam2;
+
+    before(() => {
+        cy.apiInitSetup({loginAfter: true}).then(({team}) => {
+            testTeam1 = team;
+
+            cy.apiCreateTeam('team-b', 'Team B').then(({team: team2}) => {
+                testTeam2 = team2;
+
+                // # Go to town square
+                cy.visit(`/${testTeam1.name}/channels/town-square`);
+                cy.get('#teamSidebarWrapper').should('be.visible');
+                cy.get(`#${testTeam2.name}TeamButton`).should('be.visible');
+            });
+        });
+    });
+
+    it('measures switching between two teams from LHS', () => {
+        // # Invoke window object
+        measurePerformance(
+            'teamLoad',
+            1900,
+            () => {
+                // # Switch to Team 2
+                cy.get('#teamSidebarWrapper').within(() => {
+                    cy.get(`#${testTeam2.name}TeamButton`).should('be.visible').click();
+                });
+
+                // * Expect that the user has switched teams
+                return expectActiveTeamToBe(testTeam2.display_name, testTeam2.name);
+            },
+
+            // # Reset test run so we can start on the initially specified team
+            () => {
+                cy.visit(`/${testTeam1.name}/channels/town-square`);
+                cy.get('#teamSidebarWrapper').should('be.visible');
+                cy.get(`#${testTeam2.name}TeamButton`).should('be.visible');
+            },
+        );
+    });
+});
+
+const expectActiveTeamToBe = (title, url) => {
+    // * Expect channel title to match title passed in argument
+    cy.get('#sidebar-header-container').
+        should('be.visible').
+        and('contain.text', title);
+
+    // * Expect that center channel is visible and page has loaded
+    cy.get('#app-content').should('be.visible');
+
+    // * Expect url to match url passed in argument
+    return cy.url().should('contain', url);
+};

e2e-tests/cypress/tests/integration/channels/performance/utils.js

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+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+export const measurePerformance = (name, upperLimit, callback, reset, runs = 6) => {
+    return cy.window().its('performance').then((performance) => {
+        const durations = [];
+
+        Cypress._.times(runs, (i) => {
+            const markerNameA = `${name}_start_${i}`;
+            const markerNameB = `${name}_end_${i}`;
+
+            cy.wrap({mark: () => performance.mark(markerNameA)}).invoke('mark');
+            callback().then(() => {
+                performance.mark(markerNameB);
+
+                performance.measure(`${name}_${i}`, markerNameA, markerNameB);
+                const measure = performance.getEntriesByName(`${name}_${i}`)[0];
+                durations.push(measure.duration);
+            });
+
+            reset();
+        });
+
+        const currentTime = Date.now();
+
+        cy.log('loop finish').then(() => {
+            const avgDuration = Math.round(durations.reduce((a, b) => a + b) / runs);
+            cy.log(`[PERFORMANCE] ${name}: ${avgDuration}ms ${avgDuration <= upperLimit ? ' within upper limit' : ' outside upper limit'} of ${upperLimit}ms`);
+            cy.writeFile(`./tests/integration/performance/logs/${name}_${currentTime}.json`, {name, date: currentTime, duration: avgDuration});
+            assert.isAtMost(avgDuration, upperLimit);
+
+            // Clean the marks
+            performance.clearMarks();
+            performance.clearMeasures();
+        });
+    });
+};