test(deno): add example of parseAsync behavior (yargs#1902)

moimikey · Apr 7, 2021 · 6d115fc · 6d115fc
1 parent 11a9aac
commit 6d115fc
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Showing 2 changed files with 18 additions and 5 deletions.
diff --git a/deno.ts b/deno.ts
@@ -2,10 +2,6 @@
 import denoPlatformShim from './lib/platform-shims/deno.ts';
 import {YargsFactory} from './build/lib/yargs-factory.js';
 
-const WrappedYargs = YargsFactory(denoPlatformShim);
-
-function Yargs(args?: string[]) {
-  return WrappedYargs(args);
-}
+const Yargs = YargsFactory(denoPlatformShim);
 
 export default Yargs;
diff --git a/test/deno/yargs.test.ts b/test/deno/yargs.test.ts
@@ -53,3 +53,20 @@ Deno.test('hierarchy of commands', async () => {
   yargs().command(commands).parse('a c 10 5', context);
   assertEquals(context.output.value, 15);
 });
+
+Deno.test('parseAsync()', async () => {
+  const err: Error | null = null;
+  const argvPromise = yargs()
+    .middleware([
+      async (argv: Arguments) => {
+        await new Promise(resolve => {
+          setTimeout(resolve, 10);
+        });
+        argv.foo *= 2;
+      },
+    ])
+    .parseAsync('--foo 33');
+  assertEquals(typeof argvPromise.then, 'function');
+  const argv = (await argvPromise) as Arguments;
+  assertEquals(argv.foo, 66);
+});