test: improve coverage for util.promisify

mithunsasidharan · MylesBorins · commit 98cc1fef94b0 · 2018-01-22T03:54:37.000-05:00
Add a test that confirms that non-function arguments passed to util.promisify throw an ERR_INVALID_ARG_TYPE error. PR-URL: #17591 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Jon Moss <me@jonathanmoss.me> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
diff --git a/test/parallel/test-util-promisify.js b/test/parallel/test-util-promisify.js
@@ -185,3 +185,13 @@ const stat = promisify(fs.stat);
     })
   ]);
 }
+
+[undefined, null, true, 0, 'str', {}, [], Symbol()].forEach((input) => {
+  common.expectsError(
+    () => promisify(input),
+    {
+      code: 'ERR_INVALID_ARG_TYPE',
+      type: TypeError,
+      message: 'The "original" argument must be of type function'
+    });
+});
