checkPropTypes: add flag to throw the error instead of logging

Adds a `checkPropTypeWithErrors` convenience function, which calls
`checkPropTypes` with `throwErrors` set to true

Fixes #34

__tests__/PropTypesDevelopmentStandalone-test.js

@@ -146,6 +146,31 @@ describe('PropTypesDevelopmentStandalone', () => {
       expect(console.error.calls.argsFor(0)[0]).toContain('some error');
       expect(returnValue).toBe(undefined);
     });
+
+    it('throws an error if `throwError` is set', () => {
+      const error = 'some error';
+      const propTypes = {
+        foo(props, propName, componentName) {
+          throw new Error(error);
+        },
+      };
+      const props = {foo: 'foo'};
+
+      let returnValue;
+      const checkFn = () => {
+        returnValue = PropTypes.checkPropTypes(
+          propTypes,
+          props,
+          'prop',
+          'testComponent',
+          null,
+          true,
+        );
+      };
+
+      expect(checkFn).toThrow(error);
+      expect(returnValue).toBe(undefined);
+    });
   });
 
   describe('Primitive Types', () => {

checkPropTypes.js

@@ -27,7 +27,7 @@ if (process.env.NODE_ENV !== 'production') {
  * @param {?Function} getStack Returns the component stack.
  * @private
  */
-function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
+function checkPropTypes(typeSpecs, values, location, componentName, getStack, throwError) {
   if (process.env.NODE_ENV !== 'production') {
     for (var typeSpecName in typeSpecs) {
       if (typeSpecs.hasOwnProperty(typeSpecName)) {
@@ -51,7 +51,11 @@ function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
 
           var stack = getStack ? getStack() : '';
 
-          warning(false, 'Failed %s type: %s%s', location, error.message, stack != null ? stack : '');
+          if (throwError) {
+            throw error;
+          } else {
+            warning(false, 'Failed %s type: %s%s', location, error.message, stack != null ? stack : '');
+          }
         }
       }
     }

checkPropTypesWithErrors.js

@@ -0,0 +1,11 @@
+'use strict';
+
+if (process.env.NODE_ENV !== 'production') {
+  var checkPropTypes = require('./checkPropTypes');
+}
+
+function checkPropTypesWithErrors(typeSpecs, values, location, componentName, getStack) {
+  checkPropTypes(typeSpecs, values, location, componentName, getStack, true);
+}
+
+module.exports = checkPropTypesWithErrors;

factoryWithThrowingShims.js

@@ -53,6 +53,7 @@ module.exports = function() {
   };
 
   ReactPropTypes.checkPropTypes = emptyFunction;
+  ReactPropTypes.checkPropTypesWithErrors = emptyFunction;
   ReactPropTypes.PropTypes = ReactPropTypes;
 
   return ReactPropTypes;

factoryWithTypeCheckers.js

@@ -15,6 +15,7 @@ var warning = require('fbjs/lib/warning');
 
 var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');
 var checkPropTypes = require('./checkPropTypes');
+var checkPropTypesWithErrors = require('./checkPropTypesWithErrors');
 
 module.exports = function(isValidElement, throwOnDirectAccess) {
   /* global Symbol */
@@ -506,6 +507,7 @@ module.exports = function(isValidElement, throwOnDirectAccess) {
   }
 
   ReactPropTypes.checkPropTypes = checkPropTypes;
+  ReactPropTypes.checkPropTypesWithErrors = checkPropTypesWithErrors;
   ReactPropTypes.PropTypes = ReactPropTypes;
 
   return ReactPropTypes;