Commit With Frontend and Backend in MERN

backend/node_modules/mongoose/lib/helpers/printJestWarning.js

@@ -0,0 +1,21 @@
+'use strict';
+
+const utils = require('../utils');
+
+if (typeof jest !== 'undefined' && !process.env.SUPPRESS_JEST_WARNINGS) {
+  if (typeof window !== 'undefined') {
+    utils.warn('Mongoose: looks like you\'re trying to test a Mongoose app ' +
+      'with Jest\'s default jsdom test environment. Please make sure you read ' +
+      'Mongoose\'s docs on configuring Jest to test Node.js apps: ' +
+      'https://mongoosejs.com/docs/jest.html. Set the SUPPRESS_JEST_WARNINGS to true ' +
+      'to hide this warning.');
+  }
+
+  if (setTimeout.clock != null && typeof setTimeout.clock.Date === 'function') {
+    utils.warn('Mongoose: looks like you\'re trying to test a Mongoose app ' +
+      'with Jest\'s mock timers enabled. Please make sure you read ' +
+      'Mongoose\'s docs on configuring Jest to test Node.js apps: ' +
+      'https://mongoosejs.com/docs/jest.html. Set the SUPPRESS_JEST_WARNINGS to true ' +
+      'to hide this warning.');
+  }
+}