fix(jest-haste-map): don't throw on missing mapper in Node crawler (#8558)

* fix(jest-haste-map): don't pass mapper to Node crawler

* add changelog

* get rid of throwing when mapper passed to node crawler

Author: thymikee

CHANGELOG.md

@@ -12,6 +12,7 @@
 - `[babel-plugin-jest-hoist]` Expand list of whitelisted globals in global mocks ([#8429](https://github.com/facebook/jest/pull/8429)
 - `[jest-core]` Make watch plugin initialization errors look nice ([#8422](https://github.com/facebook/jest/pull/8422))
 - `[jest-snapshot]` Prevent inline snapshots from drifting when inline snapshots are updated ([#8492](https://github.com/facebook/jest/pull/8492))
+- `[jest-haste-map]` Don't throw on missing mapper in Node crawler ([#8558](https://github.com/facebook/jest/pull/8558))
 
 ### Chore & Maintenance
 

packages/jest-haste-map/src/__tests__/index.test.js

@@ -426,6 +426,7 @@ describe('HasteMap', () => {
         const hasteMap = new HasteMap({
           ...defaultConfig,
           computeSha1: true,
+          mapper: file => [file],
           maxWorkers: 1,
           useWatchman,
         });

packages/jest-haste-map/src/crawlers/node.ts

@@ -139,10 +139,6 @@ export = function nodeCrawl(
   removedFiles: FileData;
   hasteMap: InternalHasteMap;
 }> {
-  if (options.mapper) {
-    throw new Error(`Option 'mapper' isn't supported by the Node crawler`);
-  }
-
   const {
     data,
     extensions,