Create CustomFileInput based on existing CustomInput.

Fix failing tests due to conversion from a React
functional component to a React Class component.

This fixes reactstrap#1460.

src/CustomFileInput.js

@@ -0,0 +1,112 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
+import { mapToCssModules } from './utils';
+
+const propTypes = {
+  className: PropTypes.string,
+  id: PropTypes.oneOfType([PropTypes.string, PropTypes.number]).isRequired,
+  label: PropTypes.node,
+  valid: PropTypes.bool,
+  invalid: PropTypes.bool,
+  bsSize: PropTypes.string,
+  htmlFor: PropTypes.string,
+  cssModule: PropTypes.object,
+  onChange: PropTypes.func,
+  children: PropTypes.oneOfType([PropTypes.node, PropTypes.array, PropTypes.func]),
+  innerRef: PropTypes.oneOfType([
+    PropTypes.object,
+    PropTypes.string,
+    PropTypes.func,
+  ])
+};
+
+class CustomFileInput extends React.Component {
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            files:null,
+        };
+
+        this.onChange = this.onChange.bind(this);
+    }
+
+    onChange(e) {
+        let input = e.target;
+        let {onChange} = this.props;
+        let files = this.getSelectedFiles(input);
+
+        if (typeof(onChange) === 'function') {
+            onChange(...arguments);
+        }
+
+        this.setState({files})
+    }
+
+    getSelectedFiles(input) {
+        let {multiple} = this.props;
+
+        if (multiple && input.files) {
+            let files = [].slice.call(input.files);
+
+            return files.map(file => file.name).join(', ');
+        }
+
+        if (input.value.indexOf('fakepath') !== -1) {
+            let parts = input.value.split('\\');
+
+            return parts[parts.length - 1];
+        }
+
+        return input.value;
+    }
+
+    render() {
+        const {
+            className,
+            label,
+            valid,
+            invalid,
+            cssModule,
+            children,
+            bsSize,
+            innerRef,
+            htmlFor,
+            type,
+            onChange,
+            ...attributes
+        } = this.props;
+
+        const customClass = mapToCssModules(
+            classNames(
+                className,
+                `custom-file`,
+                bsSize ? `custom-file-${bsSize}` : false,
+            ),
+            cssModule
+        );
+
+        const validationClassNames = mapToCssModules(
+            classNames(
+                invalid && 'is-invalid',
+                valid && 'is-valid',
+            ),
+            cssModule
+        );
+
+        const labelHtmlFor = htmlFor || attributes.id;
+        const {files} = this.state;
+
+        return (
+            <div className={customClass}>
+                <input type="file" {...attributes} ref={innerRef} className={classNames(validationClassNames, mapToCssModules('custom-file-input', cssModule))} onChange={this.onChange}/>
+                <label className={mapToCssModules('custom-file-label', cssModule)} htmlFor={labelHtmlFor}>{files || label || 'Choose file'}</label>
+            </div>
+        );
+    }
+}
+
+CustomFileInput.propTypes = propTypes;
+
+export default CustomFileInput;

src/CustomInput.js

@@ -2,6 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import { mapToCssModules } from './utils';
+import CustomFileInput from './CustomFileInput';
 
 const propTypes = {
   className: PropTypes.string,
@@ -58,10 +59,7 @@ function CustomInput(props) {
 
   if (type === 'file') {
     return (
-      <div className={customClass}>
-        <input {...attributes} ref={innerRef} className={classNames(validationClassNames, mapToCssModules('custom-file-input', cssModule))} />
-        <label className={mapToCssModules('custom-file-label', cssModule)} htmlFor={labelHtmlFor}>{label || 'Choose file'}</label>
-      </div>
+      <CustomFileInput {...props}/>
     );
   }
 

src/__tests__/CustomInput.spec.js

@@ -212,8 +212,8 @@ describe('Custom Inputs', () => {
 
   describe('CustomFile', () => {
     it('should render children in the outer div', () => {
-      const file = shallow(<CustomInput type="file" />);
-      expect(file.type()).toBe('div');
+      const file = mount(<CustomInput type="file" />);
+      expect(file.find('.custom-file').first().type()).toBe('div');
     });
 
     it('should add class is-invalid when invalid is true', () => {

src/index.js

@@ -38,6 +38,7 @@ export CarouselCaption from './CarouselCaption';
 export CardSubtitle from './CardSubtitle';
 export CardText from './CardText';
 export CardTitle from './CardTitle';
+export CustomFileInput from './CustomFileInput';
 export CustomInput from './CustomInput';
 export PopperContent from './PopperContent';
 export PopperTargetHelper from './PopperTargetHelper';