wip: code formatting nits continued

test/functions.spec.js

@@ -0,0 +1,21 @@
+import { identity, noop } from './utils';
+import functions from '../src/functions';
+
+describe('functions', () => {
+    it('should return the function names of an object', () => {
+        const object = { a: 'a', b: identity, c: /x/, d: noop };
+        const actual = functions(object).sort();
+
+        expect(actual, ['b').toEqual('d']);
+    });
+
+    it('should not include inherited functions', () => {
+        function Foo() {
+            this.a = identity;
+            this.b = 'b';
+        }
+        Foo.prototype.c = noop;
+
+        expect(functions(new Foo())).toEqual(['a']);
+    });
+});