optimize WechatAPI error hint

Author: Cap32

package.json

@@ -42,7 +42,8 @@
   "dependencies": {
     "create-react-context": "^0.2.3",
     "emit-lite": "^2.0.0",
-    "prop-types": "^15.5.7"
+    "prop-types": "^15.5.7",
+    "tiny-invariant": "^1.0.3"
   },
   "devDependencies": {
     "@babel/cli": "^7.1.2",

src/withWechatAPI.js

@@ -1,9 +1,14 @@
 import React, { PureComponent } from 'react';
 import WechatAPIContext from './WechatAPIContext';
+import invariant from 'tiny-invariant';
 
 export default function withWechatAPI(WrappedComponent) {
 	return class WechatAPIConsumer extends PureComponent {
 		renderChildren = (wechatAPI) => {
+			invariant(
+				wechatAPI,
+				'You should not use <AppTitle> outside <WechatAPIProvider>',
+			);
 			return <WrappedComponent {...this.props} wechatAPI={wechatAPI} />;
 		};
 

yarn.lock

@@ -8591,6 +8591,10 @@ timers-browserify@^2.0.4:
   dependencies:
     setimmediate "^1.0.4"
 
+tiny-invariant@^1.0.3:
+  version "1.0.3"
+  resolved "http://registry.npm.taobao.org/tiny-invariant/download/tiny-invariant-1.0.3.tgz#91efaaa0269ccb6271f0296aeedb05fc3e067b7a"
+
 tmp@^0.0.29:
   version "0.0.29"
   resolved "http://registry.npm.taobao.org/tmp/download/tmp-0.0.29.tgz#f25125ff0dd9da3ccb0c2dd371ee1288bb9128c0"