feat(jest-message-util): improve detection of error causes (#13912)

brodo · web-flow · commit 267fdbe2eaff · 2023-02-15T10:49:14.000+01:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ### Features
 
-- `[jest-message-util]` Add support for [error causes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause)
+- `[jest-message-util]` Add support for [error causes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause) ([#13868](https://github.com/facebook/jest/pull/13868) & [#13912](https://github.com/facebook/jest/pull/13912))
 
 ### Fixes
 
diff --git a/packages/jest-message-util/src/index.ts b/packages/jest-message-util/src/index.ts
@@ -152,7 +152,15 @@ export const formatExecError = (
       const prefix = '\n\nCause:\n';
       if (typeof error.cause === 'string' || typeof error.cause === 'number') {
         cause += `${prefix}${error.cause}`;
-      } else if (types.isNativeError(error.cause)) {
+      } else if (
+        types.isNativeError(error.cause) ||
+        error.cause instanceof Error
+      ) {
+        /* `isNativeError` is used, because the error might come from another realm.
+         `instanceof Error` is used because `isNativeError` does return `false` for some
+         things that are `instanceof Error` like the errors provided in
+         [verror](https://www.npmjs.com/package/verror) or [axios](https://axios-http.com).
+        */
         const formatted = formatExecError(
           error.cause,
           config,
