feat: show stack trace for aggregated errors, show full stack trace

packages/vitest/src/node/state.ts

@@ -1,10 +1,19 @@
 import type { ErrorWithDiff, File, Task, TaskResultPack, UserConsoleLog } from '../types'
+// can't import actual functions from utils, because it's incompatible with @vitest/browsers
+import type { AggregateError as AggregateErrorPonyfill } from '../utils'
 
 interface CollectingPromise {
   promise: Promise<void>
   resolve: () => void
 }
 
+export const isAggregateError = (err: unknown): err is AggregateErrorPonyfill => {
+  if (typeof AggregateError !== 'undefined' && err instanceof AggregateError)
+    return true
+
+  return err instanceof Error && 'errors' in err
+}
+
 // Note this file is shared for both node and browser, be aware to avoid node specific logic
 export class StateManager {
   filesMap = new Map<string, File>()
@@ -14,7 +23,10 @@ export class StateManager {
   taskFileMap = new WeakMap<Task, File>()
   errorsSet = new Set<unknown>()
 
-  catchError(err: unknown, type: string) {
+  catchError(err: unknown, type: string): void {
+    if (isAggregateError(err))
+      return err.errors.forEach(error => this.catchError(error, type));
+
     (err as ErrorWithDiff).type = type
     this.errorsSet.add(err)
   }

packages/vitest/src/runtime/setup.ts

@@ -15,6 +15,9 @@ export async function setupGlobalEnv(config: ResolvedConfig) {
     enumerable: false,
   })
 
+  // it's useful to see the full stack trace in the console by default
+  Error.stackTraceLimit = 100
+
   // should be re-declared for each test
   // if run with "threads: false"
   setupDefines(config.defines)