wip: code formatting nits continued

test/meanBy.spec.js

@@ -0,0 +1,28 @@
+import { slice } from './utils';
+import meanBy from '../src/meanBy';
+
+describe('meanBy', () => {
+    const objects = [{ a: 2 }, { a: 3 }, { a: 1 }];
+
+    it('should work with an `iteratee`', () => {
+        const actual = meanBy(objects, (object) => object.a);
+
+        expect(actual).toEqual(2);
+    });
+
+    it('should provide correct `iteratee` arguments', () => {
+        let args;
+
+        meanBy(objects, function () {
+            args || (args = slice.call(arguments));
+        });
+
+        expect(args).toEqual([{ a: 2 }]);
+    });
+
+    it('should work with `_.property` shorthands', () => {
+        const arrays = [[2], [3], [1]];
+        expect(meanBy(arrays, 0)).toBe(2);
+        expect(meanBy(objects, 'a')).toBe(2);
+    });
+});