Forbid Haste in Jest (#11647)

Author: gaearon

scripts/jest/config.source.js

@@ -1,6 +1,9 @@
 'use strict';
 
 module.exports = {
+  haste: {
+    hasteImplModulePath: require.resolve('./noHaste.js'),
+  },
   modulePathIgnorePatterns: [
     '<rootDir>/scripts/rollup/shims/',
     '<rootDir>/scripts/bench/',

scripts/jest/noHaste.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = {
+  getHasteName() {
+    // We never want Haste.
+    return null;
+  },
+};