Use NODE_ENV check instead of __DEV__

Author: philipp-spiess

__tests__/ReComponent-test.js

@@ -134,8 +134,9 @@ describe("ReComponent", () => {
   });
 
   it("does not throw errors in production", () => {
+    let originalNodeEnv = process.env.NODE_ENV;
     try {
-      global.__DEV__ = false;
+      process.env.NODE_ENV = "production";
 
       let click;
       class Example extends ReComponent {
@@ -156,7 +157,7 @@ describe("ReComponent", () => {
       ReactDOM.render(<Example />, container);
       expect(() => click()).not.toThrowError();
     } finally {
-      global.__DEV__ = true;
+      process.env.NODE_ENV = originalNodeEnv;
     }
   });
 });

__tests__/helpers.js

@@ -1,7 +1,3 @@
-// This is necessary to simulate the development environment where errors should
-// be reported.
-global.__DEV__ = true;
-
 export function click(element) {
   element.dispatchEvent(new Event("click", { bubbles: true }));
 }

src/re.js

@@ -11,7 +11,7 @@ export function Re(Component) {
     constructor(props) {
       super(props);
 
-      if (__DEV__) {
+      if (process.env.NODE_ENV !== "production") {
         if (typeof this.reducer !== "function") {
           const name = this.displayName || this.constructor.name;
           throw new Error(
@@ -27,7 +27,7 @@ export function Re(Component) {
       const originalSetState = this.setState;
       let setState = this.setState;
 
-      if (__DEV__) {
+      if (process.env.NODE_ENV !== "production") {
         this.setState = () => {
           const name = this.displayName || this.constructor.name;
           throw new Error(
@@ -86,7 +86,7 @@ export function Re(Component) {
         const updater = state => {
           const reduced = this.reducer(action, state);
 
-          if (__DEV__) {
+          if (process.env.NODE_ENV !== "production") {
             if (typeof reduced === "undefined") {
               const name = this.displayName || this.constructor.name;
               throw new Error(
@@ -113,7 +113,7 @@ export function Re(Component) {
               sideEffects = reduced.sideEffects;
               break;
             default: {
-              if (__DEV__) {
+              if (process.env.NODE_ENV !== "production") {
                 const name = this.displayName || this.constructor.name;
                 throw new Error(
                   name +