From 575982b96dfd959f72ce8f44bc7d3f3c5e102597 Mon Sep 17 00:00:00 2001
From: Dan Abramov <dan.abramov@gmail.com>
Date: Thu, 23 Nov 2017 18:02:47 +0000
Subject: [PATCH] Forbid Haste in Jest (#11647)

---
 scripts/jest/config.source.js | 3 +++
 scripts/jest/noHaste.js       | 8 ++++++++
 2 files changed, 11 insertions(+)
 create mode 100644 scripts/jest/noHaste.js

diff --git a/scripts/jest/config.source.js b/scripts/jest/config.source.js
index 7aa6243d82..d3436e1ea4 100644
--- a/scripts/jest/config.source.js
+++ b/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/',
diff --git a/scripts/jest/noHaste.js b/scripts/jest/noHaste.js
new file mode 100644
index 0000000000..bf0e315b22
--- /dev/null
+++ b/scripts/jest/noHaste.js
@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = {
+  getHasteName() {
+    // We never want Haste.
+    return null;
+  },
+};