add tests

Author: mununki

jscomp/syntax/tests/ppx/react/asyncAwait.res

@@ -0,0 +1,7 @@
+let f = a => Js.Promise.resolve(a + a)
+
+@react.component
+let make = async (~a) => {
+  let a = await f(a)
+  <div> {React.int(a)} </div>
+}

jscomp/syntax/tests/ppx/react/expected/asyncAwait.res.txt

@@ -0,0 +1,12 @@
+let f = a => Js.Promise.resolve(a + a)
+type props<'a> = {a: 'a}
+
+let make = ({a, _}: props<_>) => {
+  let a = await f(a)
+  ReactDOM.jsx("div", {children: ?ReactDOM.someElement({React.int(a)})})
+}
+let make = {
+  let \"AsyncAwait" = (props: props<_>) => make(props)
+
+  \"AsyncAwait"
+}