[Fixed] In React.createElement, children can be passed in props

Previously, children could only be passed in as separate arguments to
React.createElement

Signed-off-by: Geoff Pleiss <gpleiss@pivotal.io>

Author: August Toman-Yih

lib/__tests__/index-test.js

@@ -706,3 +706,31 @@ describe('warningPrefix', () => {
     });
   });
 });
+
+describe('testing children', () => {
+  var createElement = React.createElement;
+
+  before(() => {
+    a11y(React, { exclude: ['REDUNDANT_ALT'] });
+  });
+
+  after(() => {
+    React.createElement = createElement;
+  });
+
+  describe('when children is passed down in props', () => {
+    it('calls each test with the children', () => {
+      doNotExpectWarning(assertions.render.NO_LABEL.msg, () => {
+        React.createElement('a', {href: 'google.com', children: 'Google'});
+      });
+    });
+  });
+
+  describe('when children is passed down separately from props', () => {
+    it('calls each test with the children', () => {
+      doNotExpectWarning(assertions.render.NO_LABEL.msg, () => {
+        React.createElement('a', {href: 'google.com'}, 'Google');
+      });
+    });
+  });
+});

lib/index.js

@@ -177,6 +177,11 @@ var reactA11y = (React, options) => {
     var props = _props || {};
     options = options || {};
 
+    if (children.length === 0) {
+      children = props.children;
+      delete props.children;
+    }
+
     props.id = createId(props);
     var reactEl = _createElement.apply(this, [type, props].concat(children));
     var failureCB = handleFailure.bind(undefined, options, reactEl);