feat: add concurrent option to sequence config (#3604)

Co-authored-by: Vladimir <sleuths.slews0s@icloud.com>

Author: fenghan34

docs/config/index.md

@@ -1308,6 +1308,15 @@ If you want tests to run randomly, you can enable it with this option, or CLI ar
 
 Vitest usually uses cache to sort tests, so long running tests start earlier - this makes tests run faster. If your tests will run in random order you will lose this performance improvement, but it may be useful to track tests that accidentally depend on another run previously.
 
+#### sequence.concurrent
+
+- **Type**: `boolean`
+- **Default**: `false`
+- **CLI**: `--sequence.concurrent`, `--sequence.concurrent=false`
+- **Version**: Since Vitest 0.32.2
+
+If you want tests to run in parallel, you can enable it with this option, or CLI argument [`--sequence.concurrent`](/guide/cli).
+
 #### sequence.seed<NonProjectOption />
 
 - **Type**: `number`

packages/runner/src/suite.ts

@@ -31,7 +31,7 @@ export function getRunner() {
 
 export function clearCollectorContext(currentRunner: VitestRunner) {
   if (!defaultSuite)
-    defaultSuite = currentRunner.config.sequence.shuffle ? suite.shuffle('') : suite('')
+    defaultSuite = currentRunner.config.sequence.shuffle ? suite.shuffle('') : currentRunner.config.sequence.concurrent ? suite.concurrent('') : suite('')
   runner = currentRunner
   collectorContext.tasks.length = 0
   defaultSuite.clear()
@@ -83,7 +83,7 @@ function createSuiteCollector(name: string, factory: SuiteFactory = () => { }, m
       meta: Object.create(null),
     } as Omit<Test, 'context'> as Test
 
-    if (this.concurrent || concurrent)
+    if (this.concurrent || concurrent || runner.config.sequence.concurrent)
       test.concurrent = true
     if (shuffle)
       test.shuffle = true

packages/runner/src/types/runner.ts

@@ -9,6 +9,7 @@ export interface VitestRunnerConfig {
   allowOnly?: boolean
   sequence: {
     shuffle?: boolean
+    concurrent?: boolean
     seed: number
     hooks: SequenceHooks
     setupFiles: SequenceSetupFiles

packages/vitest/src/node/cli.ts

@@ -41,7 +41,7 @@ cli
   .option('--dangerouslyIgnoreUnhandledErrors', 'Ignore any unhandled errors that occur')
   .option('--shard <shard>', 'Test suite shard to execute in a format of <index>/<count>')
   .option('--changed [since]', 'Run tests that are affected by the changed files (default: false)')
-  .option('--sequence <options>', 'Define in what order to run tests (use --sequence.shuffle to run tests in random order)')
+  .option('--sequence <options>', 'Define in what order to run tests (use --sequence.shuffle to run tests in random order, use --sequence.concurrent to run tests in parallel)')
   .option('--segfaultRetry <times>', 'Return tests on segment fault (default: 0)', { default: 0 })
   .option('--no-color', 'Removes colors from the console output')
   .option('--inspect', 'Enable Node.js inspector')

packages/vitest/src/types/config.ts

@@ -48,6 +48,11 @@ interface SequenceOptions {
    * @default false
    */
   shuffle?: boolean
+  /**
+   * Should tests run in parallel.
+   * @default false
+   */
+  concurrent?: boolean
   /**
    * Defines how setup files should be ordered
    * - 'parallel' will run all setup files in parallel
@@ -703,6 +708,7 @@ export interface ResolvedConfig extends Omit<Required<UserConfig>, 'config' | 'f
     hooks: SequenceHooks
     setupFiles: SequenceSetupFiles
     shuffle?: boolean
+    concurrent?: boolean
     seed: number
   }