[Tests] ensure that this function remains anonymous, despite ES6 name inference.

Author: ljharb

index.js

@@ -150,7 +150,7 @@ function toStr (obj) {
 
 function nameOf (f) {
     if (f.name) return f.name;
-    var m = f.toString().match(/^function\s*([\w$]+)/);
+    var m = String(f).match(/^function\s*([\w$]+)/);
     if (m) return m[1];
 }
 

test/fn.js

@@ -9,7 +9,9 @@ test('function', function (t) {
 
 test('function name', function (t) {
     t.plan(1);
-    var f = function () {};
+    var f = (function () {
+      return function () {};
+    }());
     f.toString = function () { return 'function xxx () {}' };
     var obj = [ 1, 2, f, 4 ];
     t.equal(inspect(obj), '[ 1, 2, [Function: xxx], 4 ]');