fix(arrows): handle async arrow functions

* add case for async arrow functions when wrapping

Fixes #61.

* add missing `done()` to test case

Author: TooTallNate

src/index.js

@@ -105,10 +105,12 @@ export default function parseFunction (opts) {
 
       const isFunction = result.value.startsWith('function')
       const isAsyncFn = result.value.startsWith('async function')
+      const isAsyncArrow = result.value.startsWith('async')
+        && result.value.includes('=>')
       // eslint-disable-next-line no-useless-escape
       const isMethod = /^\*?.+\([\s\S\w\W]*\)\s*\{/i.test(result.value)
 
-      if (!(isFunction || isAsyncFn) && isMethod) {
+      if (!(isFunction || isAsyncFn || isAsyncArrow) && isMethod) {
         result.value = `{ ${result.value} }`
       }
 

test.js

@@ -403,3 +403,16 @@ test('should call fn returned from plugin only when `parse` is called', (done) =
   test.strictEqual(res.params, 'a, b')
   done()
 })
+
+// https://github.com/tunnckoCore/parse-function/issues/61
+test('should work with an async arrow function with an `if` statement', (done) => {
+  const app = parseFunction()
+  const parsed = app.parse('async (v) => { if (v) {} }')
+  test.deepEqual(parsed, {
+    name: null,
+    body: ' if (v) {} ',
+    args: [ 'v' ],
+    params: 'v'
+  })
+  done()
+})