Add support for TypeScript

.all-contributorsrc

@@ -24,6 +24,15 @@
         "test",
         "tool"
       ]
+    },
+    {
+      "login": "otofu-square",
+      "name": "otofu-square",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/10118235?v=4",
+      "profile": "https://github.com/otofu-square",
+      "contributions": [
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -9,7 +9,7 @@ Simple component wrapper and utilities for testing React hooks.
 [![downloads](https://img.shields.io/npm/dm/react-hooks-testing-library.svg?style=flat-square)](http://www.npmtrends.com/react-hooks-testing-library)
 [![MIT License](https://img.shields.io/npm/l/react-hooks-testing-library.svg?style=flat-square)](https://github.com/mpeyper/react-hooks-testing-library/blob/master/LICENSE.md)
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com)
 [![Code of Conduct](https://img.shields.io/badge/code%20of-conduct-ff69b4.svg?style=flat-square)](https://github.com/mpeyper/react-hooks-testing-library/blob/master/CODE_OF_CONDUCT.md)
 
@@ -156,8 +156,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars0.githubusercontent.com/u/23029903?v=4" width="100px;"/><br /><sub><b>Michael Peyper</b></sub>](https://github.com/mpeyper)<br />[💻](https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper "Code") [🎨](#design-mpeyper "Design") [📖](https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper "Documentation") [🤔](#ideas-mpeyper "Ideas, Planning, & Feedback") [🚇](#infra-mpeyper "Infrastructure (Hosting, Build-Tools, etc)") [📦](#platform-mpeyper "Packaging/porting to new platform") [⚠️](https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper "Tests") [🔧](#tool-mpeyper "Tools") |
-| :---: |
+<table><tr><td align="center"><a href="https://github.com/mpeyper"><img src="https://avatars0.githubusercontent.com/u/23029903?v=4" width="100px;" alt="Michael Peyper"/><br /><sub><b>Michael Peyper</b></sub></a><br /><a href="https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper" title="Code">💻</a> <a href="#design-mpeyper" title="Design">🎨</a> <a href="https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper" title="Documentation">📖</a> <a href="#ideas-mpeyper" title="Ideas, Planning, & Feedback">🤔</a> <a href="#infra-mpeyper" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#platform-mpeyper" title="Packaging/porting to new platform">📦</a> <a href="https://github.com/mpeyper/react-hooks-testing-library/commits?author=mpeyper" title="Tests">⚠️</a> <a href="#tool-mpeyper" title="Tools">🔧</a></td><td align="center"><a href="https://github.com/otofu-square"><img src="https://avatars0.githubusercontent.com/u/10118235?v=4" width="100px;" alt="otofu-square"/><br /><sub><b>otofu-square</b></sub></a><br /><a href="https://github.com/mpeyper/react-hooks-testing-library/commits?author=otofu-square" title="Code">💻</a></td></tr></table>
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 

index.d.ts

@@ -0,0 +1,18 @@
+import { cleanup, act, RenderOptions, RenderResult } from 'react-testing-library'
+
+export function renderHook<P, R>(
+  callback: (...args: [P]) => R,
+  options?: {
+    initialProps?: P
+  } & RenderOptions
+): {
+  readonly result: {
+    current: R
+  }
+  readonly unmount: RenderResult['unmount']
+  readonly rerender: (hookProps?: P) => void
+}
+
+export const testHook: typeof renderHook
+
+export { cleanup, act }

package.json

@@ -3,6 +3,7 @@
   "version": "0.3.4",
   "description": "Simple component wrapper for testing React hooks",
   "main": "lib/index.js",
+  "typings": "./index.d.ts",
   "author": "Michael Peyper",
   "repository": {
     "type": "git",
@@ -26,6 +27,7 @@
     "@babel/plugin-transform-modules-commonjs": "^7.2.0",
     "@babel/preset-env": "^7.3.4",
     "@babel/preset-react": "^7.0.0",
+    "@types/react": "^16.8.5",
     "all-contributors-cli": "^6.1.2",
     "babel-eslint": "^10.0.1",
     "babel-plugin-module-resolver": "^3.2.0",
@@ -39,7 +41,9 @@
     "prettier-eslint": "^8.8.2",
     "prettier-eslint-cli": "^4.7.1",
     "react": "^16.8.3",
-    "react-dom": "^16.8.3"
+    "react-dom": "^16.8.3",
+    "typescript": "^3.3.3333",
+    "typings-tester": "^0.3.2"
   },
   "peerDependencies": {
     "react": "^16.8.0",

test/typescript.test.js

@@ -0,0 +1,7 @@
+import { checkDirectory } from 'typings-tester'
+
+describe('TypeScript definitions', function() {
+  it('should compile against index.d.ts', () => {
+    checkDirectory(__dirname + '/typescript')
+  })
+})

test/typescript/renderHook.ts

@@ -0,0 +1,66 @@
+import { useState, useCallback, useEffect } from 'react'
+import { renderHook } from 'react-hooks-testing-library'
+
+const useCounter = (initialCount: number = 0) => {
+  const [count, setCount] = useState(initialCount)
+  const incrementBy = useCallback(
+    (n: number) => {
+      setCount(count + n)
+    },
+    [count]
+  )
+  const decrementBy = useCallback(
+    (n: number) => {
+      setCount(count - n)
+    },
+    [count]
+  )
+  return {
+    count,
+    incrementBy,
+    decrementBy
+  }
+}
+
+function checkTypesWithNoInitialProps() {
+  const { result, unmount, rerender } = renderHook(() => useCounter())
+
+  // check types
+  const _result: {
+    current: {
+      count: number
+      incrementBy: (_: number) => void
+      decrementBy: (_: number) => void
+    }
+  } = result
+  const _unmount: () => boolean = unmount
+  const _rerender: () => void = rerender
+}
+
+function checkTypesWithInitialProps() {
+  const { result, unmount, rerender } = renderHook(({ count }) => useCounter(count), {
+    initialProps: { count: 10 }
+  })
+
+  // check types
+  const _result: {
+    current: {
+      count: number
+      incrementBy: (_: number) => void
+      decrementBy: (_: number) => void
+    }
+  } = result
+  const _unmount: () => boolean = unmount
+  const _rerender: (_?: { count: number }) => void = rerender
+}
+
+function checkTypesWhenHookReturnsVoid() {
+  const { result, unmount, rerender } = renderHook(() => useEffect(() => {}))
+
+  // check types
+  const _result: {
+    current: void
+  } = result
+  const _unmount: () => boolean = unmount
+  const _rerender: () => void = rerender
+}

test/typescript/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "lib": ["es2015", "dom"],
+    "strict": true,
+    "baseUrl": "../../",
+    "paths": {
+      "react-hooks-testing-library": ["index.d.ts"]
+    }
+  }
+}