Setting NODE_ENV to test instead because setting it to prod will supress error messaging

Author: coryhouse

tools/testSetup.js

@@ -1,13 +1,15 @@
 // Tests are placed alongside files under test.
 // This file does the following:
-// 1. Sets the environment to 'production' so that
+// 1. Sets the environment to 'test' so that
 //    dev-specific babel config in .babelrc doesn't run.
 // 2. Disables Webpack-specific features that Mocha doesn't understand.
 // 3. Registers babel for transpiling our code for testing.
 
 // This assures the .babelrc dev config (which includes
 // hot module reloading code) doesn't apply for tests.
-process.env.NODE_ENV = 'production';
+// Setting NODE_ENV to test instead of production because setting it to production will suppress error messaging
+// and propType validation warnings.
+process.env.NODE_ENV = 'test';
 
 // Disable webpack-specific features for tests since
 // Mocha doesn't know what to do with them.