wip: code formatting nits continued

test/isArray.spec.js

@@ -0,0 +1,36 @@
+import lodashStable from 'lodash';
+import { falsey, stubFalse, args, slice, symbol, realm } from './utils';
+import isArray from '../src/isArray';
+
+describe('isArray', () => {
+    it('should return `true` for arrays', () => {
+        expect(isArray([1, 2, 3])).toBe(true);
+    });
+
+    it('should return `false` for non-arrays', () => {
+        const expected = lodashStable.map(falsey, stubFalse);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isArray(value) : isArray(),
+        );
+
+        expect(actual).toEqual(expected);
+
+        expect(isArray(args)).toBe(false);
+        expect(isArray(true)).toBe(false);
+        expect(isArray(new Date())).toBe(false);
+        expect(isArray(new Error())).toBe(false);
+        expect(isArray(slice)).toBe(false);
+        expect(isArray({ 0: 1, length: 1 })).toBe(false);
+        expect(isArray(1)).toBe(false);
+        expect(isArray(/x/)).toBe(false);
+        expect(isArray('a')).toBe(false);
+        expect(isArray(symbol)).toBe(false);
+    });
+
+    it('should work with an array from another realm', () => {
+        if (realm.array) {
+            expect(isArray(realm.array)).toBe(true);
+        }
+    });
+});