Numil
Numil
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NNuxt
Created by Numil on 1/10/2025 in #❓・help
Vitest slow tests compared to jest
Hey, I can't really share more than the config i got right after this message, but we switched from Jest to Vitest for our tests (vitests with nuxt environment ofc) and the speed for the tests really increased, i wanted to know if it a slower execution was to be expected or not ? (it more that quadrupled so i guess we have other problems, and running with --pool=forks didn't change anything) 
// vitest.config.ts
import { defineVitestConfig } from '@nuxt/test-utils/config'
import { configDefaults } from 'vitest/config'

export default defineVitestConfig({
    test: {
        fakeTimers: {
            ...configDefaults.fakeTimers,
            toFake: [...configDefaults.fakeTimers.toFake, 'performance']
        },

        reporters: process.env.GITHUB_ACTIONS
            ? ['basic', 'github-actions']
            : ['default'],
        environment: 'nuxt',
        environmentOptions: {
            nuxt: {
                overrides: {
                    imports: {
                        dirs: ['~/composables/**']
                    }
                }
            }
        },
        include: ['./tests/**/*.spec.ts'],
        globals: true,
        globalSetup: './tests/vitest.global.setup.ts',
        setupFiles: ['./tests/vitest.setup.ts'],
        server: {
            deps: {
                inline: ['vitest-canvas-mock']
            }
        },
        coverage: {
            reporter: ['lcov', 'text-summary'],
            include: [
                'composables/**/*.ts',
                'components/**/*.vue',
                'pages/**/*.vue'
            ],
            reportsDirectory: './coverage'
        }
    }
})
// vitest.config.ts
import { defineVitestConfig } from '@nuxt/test-utils/config'
import { configDefaults } from 'vitest/config'

export default defineVitestConfig({
    test: {
        fakeTimers: {
            ...configDefaults.fakeTimers,
            toFake: [...configDefaults.fakeTimers.toFake, 'performance']
        },

        reporters: process.env.GITHUB_ACTIONS
            ? ['basic', 'github-actions']
            : ['default'],
        environment: 'nuxt',
        environmentOptions: {
            nuxt: {
                overrides: {
                    imports: {
                        dirs: ['~/composables/**']
                    }
                }
            }
        },
        include: ['./tests/**/*.spec.ts'],
        globals: true,
        globalSetup: './tests/vitest.global.setup.ts',
        setupFiles: ['./tests/vitest.setup.ts'],
        server: {
            deps: {
                inline: ['vitest-canvas-mock']
            }
        },
        coverage: {
            reporter: ['lcov', 'text-summary'],
            include: [
                'composables/**/*.ts',
                'components/**/*.vue',
                'pages/**/*.vue'
            ],
            reportsDirectory: './coverage'
        }
    }
})
I'll try to provide a repro really soon
15 replies