fix: form type (ant-design#7245)

.eslintignore

@@ -1,5 +1,6 @@
 components/**/*.js
 components/**/*.jsx
+components/*/__tests__/type.tsx
 !.eslintrc.js
-!components/*/__tests__/*
+!components/*/__tests__/**/*.js
 !components/*/demo/*

.jest.js

@@ -36,6 +36,7 @@ module.exports = {
     '!components/*/style/index.tsx',
     '!components/style/index.tsx',
     '!components/*/locale/index.tsx',
+    '!components/*/__tests__/**/type.tsx',
   ],
   transformIgnorePatterns,
   snapshotSerializers: [

components/form/Form.tsx

@@ -110,9 +110,14 @@ export interface FormComponentProps {
   form: WrappedFormUtils;
 }
 
-// https://github.com/DefinitelyTyped/DefinitelyTyped/issues/9951
+export type Diff<T extends string, U extends string> =
+  ({ [P in T]: P } & { [P in U]: never } & { [x: string]: never })[T];
+export type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
+
 export interface ComponentDecorator<TOwnProps> {
-  (component: React.ComponentClass<FormComponentProps & TOwnProps>): React.ComponentClass<TOwnProps>;
+  <P extends FormComponentProps>(
+    component: React.ComponentClass<P>,
+  ): React.ComponentClass<Omit<P, keyof FormComponentProps> & TOwnProps>;
 }
 
 export default class Form extends React.Component<FormProps, any> {

components/form/__tests__/type.tsx

@@ -0,0 +1,36 @@
+/* tslint:disable */
+import React from 'react';
+import Form, { FormComponentProps } from '../Form';
+
+// test Form.create on component without own props
+class WithoutOwnProps extends React.Component<any, any> {
+  state = {
+    foo: 'bar',
+  };
+  render() {
+    return <div>foo</div>;
+  }
+}
+
+const WithoutOwnPropsForm = Form.create()(WithoutOwnProps);
+
+<WithoutOwnPropsForm />;
+
+// test Form.create on component with own props
+interface WithOwnPropsProps extends FormComponentProps {
+  name: string;
+}
+
+class WithOwnProps extends React.Component<WithOwnPropsProps, any> {
+  state = {
+    foo: 'bar',
+  };
+
+  render() {
+    return <div>foo</div>;
+  }
+}
+
+const WithOwnPropsForm = Form.create()(WithOwnProps);
+
+<WithOwnPropsForm name="foo" />;