DRYing ButtonInput

src/ButtonInput.js

@@ -2,13 +2,7 @@ import React from 'react';
 import Button from './Button';
 import FormGroup from './FormGroup';
 import InputBase from './InputBase';
-
-function valueValidation({children, value}, propName, componentName) {
-  if (children && value) {
-    return new Error('Both value and children cannot be passed to ButtonInput');
-  }
-  return React.PropTypes.oneOfType([React.PropTypes.string, React.PropTypes.number]).call(null, {children, value}, propName, componentName);
-}
+import childrenValueValidation from './utils/childrenValueInputValidation';
 
 class ButtonInput extends InputBase {
   renderFormGroup(children) {
@@ -23,18 +17,20 @@ class ButtonInput extends InputBase {
   }
 }
 
+ButtonInput.types = ['button', 'reset', 'submit'];
+
 ButtonInput.defaultProps = {
   type: 'button'
 };
 
 ButtonInput.propTypes = {
-  type: React.PropTypes.oneOf(['button', 'reset', 'submit']),
+  type: React.PropTypes.oneOf(ButtonInput.types),
   bsStyle(props) {
     //defer to Button propTypes of bsStyle
     return null;
   },
-  children: valueValidation,
-  value: valueValidation
+  children: childrenValueValidation,
+  value: childrenValueValidation
 };
 
 export default ButtonInput;

src/Input.js

@@ -3,11 +3,9 @@ import InputBase from './InputBase';
 import ButtonInput from './ButtonInput';
 import deprecationWarning from './utils/deprecationWarning';
 
-const buttonTypes = ['button', 'reset', 'submit'];
-
 class Input extends InputBase {
   render() {
-    if (buttonTypes.indexOf(this.props.type) > -1) {
+    if (ButtonInput.types.indexOf(this.props.type) > -1) {
       deprecationWarning(`Input type=${this.props.type}`, 'ButtonInput');
       return <ButtonInput {...this.props} />;
     }

src/utils/childrenValueInputValidation.js

@@ -0,0 +1,14 @@
+import React from 'react';
+import { singlePropFrom } from './CustomPropTypes';
+
+const propList = ['children', 'value'];
+const typeList = [React.PropTypes.number, React.PropTypes.string];
+
+export default function valueValidation(props, propName, componentName) {
+  let error = singlePropFrom(propList)(props, propName, componentName);
+  if (!error) {
+    const oneOfType = React.PropTypes.oneOfType(typeList);
+    error = oneOfType(props, propName, componentName);
+  }
+  return error;
+}

test/ButtonInputSpec.js

@@ -55,11 +55,11 @@ describe('ButtonInput', () =>{
   });
 
   it('throws a warning if given both children and a value property', function () {
-    ReactTestUtils.renderIntoDocument(
-      <ButtonInput value="button">button</ButtonInput>
-    );
+    const testData = { value: 5, children: 'button' };
+    const result = ButtonInput.propTypes.value(testData, 'value', 'ButtonInput');
 
-    shouldWarn('Both value and children');
+    result.should.be.instanceOf(Error);
+    result.message.should.have.string('value and children');
   });
 
   it('does not throw an error for strings and numbers', function () {