feat: support standalone mode (#5565)

Author: sheremet-va

Diff for: docs/guide/cli-table.md

@@ -25,9 +25,9 @@
 | `--coverage.cleanOnRerun` | Clean coverage report on watch rerun (default: true) |
 | `--coverage.reportsDirectory <path>` | Directory to write coverage report to (default: ./coverage) |
 | `--coverage.reporter <name>` | Coverage reporters to use. Visit [`coverage.reporter`](https://vitest.dev/config/#coverage-reporter) for more information (default: `["text", "html", "clover", "json"]`) |
-| `--coverage.reportOnFailure` | Generate coverage report even when tests fail (default: false) |
-| `--coverage.allowExternal` | Collect coverage of files outside the project root (default: false) |
-| `--coverage.skipFull` | Do not show files with 100% statement, branch, and function coverage (default: false) |
+| `--coverage.reportOnFailure` | Generate coverage report even when tests fail (default: `false`) |
+| `--coverage.allowExternal` | Collect coverage of files outside the project root (default: `false`) |
+| `--coverage.skipFull` | Do not show files with 100% statement, branch, and function coverage (default: `false`) |
 | `--coverage.thresholds.100` | Shortcut to set all coverage thresholds to 100 (default: `false`) |
 | `--coverage.thresholds.perFile` | Check thresholds per file. See `--coverage.thresholds.lines`, `--coverage.thresholds.functions`, `--coverage.thresholds.branches` and `--coverage.thresholds.statements` for the actual thresholds (default: `false`) |
 | `--coverage.thresholds.autoUpdate` | Update threshold values: "lines", "functions", "branches" and "statements" to configuration file when current coverage is above the configured thresholds (default: `false`) |
@@ -119,3 +119,4 @@
 | `--segfaultRetry <times>` | Retry the test suite if it crashes due to a segfault (default: `true`) |
 | `--no-color` | Removes colors from the console output |
 | `--clearScreen` | Clear terminal screen when re-running tests during watch mode (default: `true`) |
+| `--standalone` | Start Vitest without running tests. File filters will be ignored, tests will be running only on change (default: `false`) |

Diff for: packages/ui/client/composables/client/index.ts

@@ -3,6 +3,8 @@ import type { WebSocketStatus } from '@vueuse/core'
 import type { ErrorWithDiff, File, ResolvedConfig } from 'vitest'
 import type { Ref } from 'vue'
 import { reactive } from 'vue'
+import { relative } from 'pathe'
+import { generateHash } from '@vitest/runner/utils'
 import type { RunState } from '../../../types'
 import { ENTRY_URL, isReport } from '../../constants'
 import { parseError } from '../error'
@@ -84,7 +86,29 @@ watch(
         client.rpc.getConfig(),
         client.rpc.getUnhandledErrors(),
       ])
-      client.state.collectFiles(files)
+      if (_config.standalone) {
+        const filenames = await client.rpc.getTestFiles()
+        const files = filenames.map<File>(([name, filepath]) => {
+          const path = relative(_config.root, filepath)
+          return {
+            filepath,
+            name: path,
+            id: /* #__PURE__ */ generateHash(`${path}${name || ''}`),
+            mode: 'skip',
+            type: 'suite',
+            result: {
+              state: 'skip',
+            },
+            meta: {},
+            tasks: [],
+            projectName: name,
+          }
+        })
+        client.state.collectFiles(files)
+      }
+      else {
+        client.state.collectFiles(files)
+      }
       unhandledErrors.value = (errors || []).map(parseError)
       config.value = _config
     })

Diff for: packages/vitest/src/api/setup.ts

@@ -164,6 +164,10 @@ export function setup(vitestOrWorkspace: Vitest | WorkspaceProject, _server?: Vi
         getProvidedContext() {
           return 'ctx' in vitestOrWorkspace ? vitestOrWorkspace.getProvidedContext() : ({} as any)
         },
+        async getTestFiles() {
+          const spec = await ctx.globTestFiles()
+          return spec.map(([project, file]) => [project.getName(), file]) as [string, string][]
+        },
       },
       {
         post: msg => ws.send(msg),

Diff for: packages/vitest/src/api/types.ts

@@ -15,6 +15,7 @@ export interface WebSocketHandlers {
   getCountOfFailedTests: () => number
   sendLog: (log: UserConsoleLog) => void
   getFiles: () => File[]
+  getTestFiles: () => Promise<[name: string, file: string][]>
   getPaths: () => string[]
   getConfig: () => ResolvedConfig
   resolveSnapshotPath: (testPath: string) => string

Diff for: packages/vitest/src/node/cli/cli-api.ts

@@ -88,11 +88,17 @@ export async function startVitest(
   })
 
   ctx.onAfterSetServer(() => {
-    ctx.start(cliFilters)
+    if (ctx.config.standalone)
+      ctx.init()
+    else
+      ctx.start(cliFilters)
   })
 
   try {
-    await ctx.start(cliFilters)
+    if (ctx.config.standalone)
+      await ctx.init()
+    else
+      await ctx.start(cliFilters)
   }
   catch (e) {
     process.exitCode = 1

Diff for: packages/vitest/src/node/cli/cli-config.ts

@@ -202,13 +202,13 @@ export const cliOptionsConfig: VitestCLIOptions = {
         array: true,
       },
       reportOnFailure: {
-        description: 'Generate coverage report even when tests fail (default: false)',
+        description: 'Generate coverage report even when tests fail (default: `false`)',
       },
       allowExternal: {
-        description: 'Collect coverage of files outside the project root (default: false)',
+        description: 'Collect coverage of files outside the project root (default: `false`)',
       },
       skipFull: {
-        description: 'Do not show files with 100% statement, branch, and function coverage (default: false)',
+        description: 'Do not show files with 100% statement, branch, and function coverage (default: `false`)',
       },
       thresholds: {
         description: null,
@@ -601,6 +601,9 @@ export const cliOptionsConfig: VitestCLIOptions = {
   clearScreen: {
     description: 'Clear terminal screen when re-running tests during watch mode (default: `true`)',
   },
+  standalone: {
+    description: 'Start Vitest without running tests. File filters will be ignored, tests will be running only on change (default: `false`)',
+  },
 
   // disable CLI options
   cliExclude: null,

Diff for: packages/vitest/src/node/config.ts

@@ -136,6 +136,9 @@ export function resolveConfig(
     resolved.shard = { index, count }
   }
 
+  if (resolved.standalone && !resolved.watch)
+    throw new Error(`Vitest standalone mode requires --watch`)
+
   if (resolved.maxWorkers)
     resolved.maxWorkers = Number(resolved.maxWorkers)
 

Diff for: packages/vitest/src/node/core.ts

@@ -13,7 +13,7 @@ import type { CancelReason, File } from '@vitest/runner'
 import { ViteNodeServer } from 'vite-node/server'
 import type { defineWorkspace } from 'vitest/config'
 import type { ArgumentsType, CoverageProvider, OnServerRestartHandler, Reporter, ResolvedConfig, UserConfig, UserWorkspaceConfig, VitestRunMode } from '../types'
-import { hasFailed, noop, slash, toArray, wildcardPatternToRegExp } from '../utils'
+import { getTasks, hasFailed, noop, slash, toArray, wildcardPatternToRegExp } from '../utils'
 import { getCoverageProvider } from '../integrations/coverage'
 import { CONFIG_NAMES, configFiles, workspacesFiles as workspaceFiles } from '../constants'
 import { rootDir } from '../paths'
@@ -418,6 +418,25 @@ export class Vitest {
       await this.report('onWatcherStart')
   }
 
+  async init() {
+    this._onClose = []
+
+    try {
+      await this.initCoverageProvider()
+      await this.coverageProvider?.clean(this.config.coverage.clean)
+      await this.initBrowserProviders()
+    }
+    finally {
+      await this.report('onInit', this)
+    }
+
+    // populate test files cache so watch mode can trigger a file rerun
+    await this.globTestFiles()
+
+    if (this.config.watch)
+      await this.report('onWatcherStart')
+  }
+
   private async getTestDependencies(filepath: WorkspaceSpec, deps = new Set<string>()) {
     const addImports = async ([project, filepath]: WorkspaceSpec) => {
       if (deps.has(filepath))
@@ -607,14 +626,24 @@ export class Vitest {
     if (pattern === '')
       this.filenamePattern = undefined
 
-    this.configOverride.testNamePattern = pattern ? new RegExp(pattern) : undefined
+    const testNamePattern = pattern ? new RegExp(pattern) : undefined
+    this.configOverride.testNamePattern = testNamePattern
+    // filter only test files that have tests matching the pattern
+    if (testNamePattern) {
+      files = files.filter((filepath) => {
+        const files = this.state.getFiles([filepath])
+        return !files.length || files.some((file) => {
+          const tasks = getTasks(file)
+          return !tasks.length || tasks.some(task => testNamePattern.test(task.name))
+        })
+      })
+    }
     await this.rerunFiles(files, trigger)
   }
 
-  async changeFilenamePattern(pattern: string) {
+  async changeFilenamePattern(pattern: string, files: string[] = this.state.getFilepaths()) {
     this.filenamePattern = pattern
 
-    const files = this.state.getFilepaths()
     const trigger = this.filenamePattern ? 'change filename pattern' : 'reset filename pattern'
 
     await this.rerunFiles(files, trigger)
@@ -758,8 +787,10 @@ export class Vitest {
 
       const matchingProjects: WorkspaceProject[] = []
       await Promise.all(this.projects.map(async (project) => {
-        if (await project.isTargetFile(id))
+        if (await project.isTargetFile(id)) {
           matchingProjects.push(project)
+          project.testFilesList?.push(id)
+        }
       }))
 
       if (matchingProjects.length > 0) {
@@ -940,6 +971,10 @@ export class Vitest {
     )))
   }
 
+  public async getTestFilepaths() {
+    return this.globTestFiles().then(files => files.map(([, file]) => file))
+  }
+
   public async globTestFiles(filters: string[] = []) {
     const files: WorkspaceSpec[] = []
     await Promise.all(this.projects.map(async (project) => {

Diff for: packages/vitest/src/node/logger.ts

@@ -189,7 +189,10 @@ export class Logger {
     if (this.ctx.coverageProvider)
       this.log(c.dim('      Coverage enabled with ') + c.yellow(this.ctx.coverageProvider.name))
 
-    this.log()
+    if (this.ctx.config.standalone)
+      this.log(c.yellow(`\nVitest is running in standalone mode. Edit a test file to rerun tests.`))
+    else
+      this.log()
   }
 
   async printUnhandledErrors(errors: unknown[]) {

Diff for: packages/vitest/src/node/stdin.ts

@@ -2,7 +2,7 @@ import readline from 'node:readline'
 import type { Writable } from 'node:stream'
 import c from 'picocolors'
 import prompt from 'prompts'
-import { relative } from 'pathe'
+import { relative, resolve } from 'pathe'
 import { getTests, isWindows, stdout } from '../utils'
 import { toArray } from '../utils/base'
 import type { Vitest } from './core'
@@ -73,8 +73,10 @@ export function registerConsoleShortcuts(ctx: Vitest, stdin: NodeJS.ReadStream =
     if (name === 'u')
       return ctx.updateSnapshot()
     // rerun all tests
-    if (name === 'a' || name === 'return')
-      return ctx.changeNamePattern('')
+    if (name === 'a' || name === 'return') {
+      const files = await ctx.getTestFilepaths()
+      return ctx.changeNamePattern('', files, 'rerun all tests')
+    }
     // rerun current pattern tests
     if (name === 'r')
       return ctx.rerunFiles()
@@ -113,7 +115,13 @@ export function registerConsoleShortcuts(ctx: Vitest, stdin: NodeJS.ReadStream =
     })
 
     on()
-    await ctx.changeNamePattern(filter?.trim() || '', undefined, 'change pattern')
+    const files = ctx.state.getFilepaths()
+    // if running in standalone mode, Vitest instance doesn't know about any test file
+    const cliFiles = ctx.config.standalone && !files.length
+      ? await ctx.getTestFilepaths()
+      : undefined
+
+    await ctx.changeNamePattern(filter?.trim() || '', cliFiles, 'change pattern')
   }
 
   async function inputProjectName() {
@@ -143,8 +151,12 @@ export function registerConsoleShortcuts(ctx: Vitest, stdin: NodeJS.ReadStream =
     on()
 
     latestFilename = filter?.trim() || ''
+    const lastResults = watchFilter.getLastResults()
 
-    await ctx.changeFilenamePattern(latestFilename)
+    await ctx.changeFilenamePattern(
+      latestFilename,
+      filter && lastResults.length ? lastResults.map(i => resolve(ctx.config.root, i)) : undefined,
+    )
   }
 
   let rl: readline.Interface | undefined

Diff for: packages/vitest/src/node/watch-filter.ts

@@ -179,4 +179,8 @@ export class WatchFilter {
     // @ts-expect-error -- write() method has different signature on the union type
     this.stdout.write(data)
   }
+
+  public getLastResults() {
+    return this.results
+  }
 }

Diff for: packages/vitest/src/types/config.ts

@@ -801,6 +801,15 @@ export interface UserConfig extends InlineConfig {
    */
   config?: string | false | undefined
 
+  /**
+   * Do not run tests when Vitest starts.
+   *
+   * Vitest will only run tests if it's called programmatically or the test file changes.
+   *
+   * CLI file filters will be ignored.
+   */
+  standalone?: boolean
+
   /**
    * Use happy-dom
    */

Diff for: test/reporters/tests/default.test.ts

@@ -38,7 +38,9 @@ describe('default reporter', async () => {
     // one file
     vitest.write('p')
     await vitest.waitForStdout('Input filename pattern')
-    vitest.write('a\n')
+    vitest.write('a')
+    await vitest.waitForStdout('a.test.ts')
+    vitest.write('\n')
     await vitest.waitForStdout('Filename pattern: a')
     await vitest.waitForStdout('Waiting for file changes...')
     expect(vitest.stdout).contain('✓ a1 test')