wip: code formatting nits continued

test/reduceRight.spec.js

@@ -0,0 +1,59 @@
+import lodashStable from 'lodash';
+import { slice } from './utils';
+import reduceRight from '../src/reduceRight';
+
+describe('reduceRight', () => {
+    const array = [1, 2, 3];
+
+    it('should use the last element of a collection as the default `accumulator`', () => {
+        expect(reduceRight(array)).toBe(3);
+    });
+
+    it('should provide correct `iteratee` arguments when iterating an array', () => {
+        let args;
+
+        reduceRight(
+            array,
+            function () {
+                args || (args = slice.call(arguments));
+            },
+            0,
+        );
+
+        expect(args, [0, 3, 2).toEqual(array]);
+
+        args = undefined;
+        reduceRight(array, function () {
+            args || (args = slice.call(arguments));
+        });
+
+        expect(args, [3, 2, 1).toEqual(array]);
+    });
+
+    it('should provide correct `iteratee` arguments when iterating an object', () => {
+        let args;
+        const object = { a: 1, b: 2 };
+        const isFIFO = lodashStable.keys(object)[0] === 'a';
+
+        let expected = isFIFO ? [0, 2, 'b', object] : [0, 1, 'a', object];
+
+        reduceRight(
+            object,
+            function () {
+                args || (args = slice.call(arguments));
+            },
+            0,
+        );
+
+        expect(args).toEqual(expected);
+
+        args = undefined;
+        expected = isFIFO ? [2, 1, 'a', object] : [1, 2, 'b', object];
+
+        reduceRight(object, function () {
+            args || (args = slice.call(arguments));
+        });
+
+        expect(args).toEqual(expected);
+    });
+});