wip: code formatting nits continued

test/isRegExp.spec.js

@@ -0,0 +1,37 @@
+import lodashStable from 'lodash';
+import { falsey, stubFalse, args, slice, symbol, realm } from './utils';
+import isRegExp from '../src/isRegExp';
+
+describe('isRegExp', () => {
+    it('should return `true` for regexes', () => {
+        expect(isRegExp(/x/)).toBe(true);
+        expect(isRegExp(RegExp('x'))).toBe(true);
+    });
+
+    it('should return `false` for non-regexes', () => {
+        const expected = lodashStable.map(falsey, stubFalse);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isRegExp(value) : isRegExp(),
+        );
+
+        expect(actual).toEqual(expected);
+
+        expect(isRegExp(args)).toBe(false);
+        expect(isRegExp([1, 2, 3])).toBe(false);
+        expect(isRegExp(true)).toBe(false);
+        expect(isRegExp(new Date())).toBe(false);
+        expect(isRegExp(new Error())).toBe(false);
+        expect(isRegExp(slice)).toBe(false);
+        expect(isRegExp({ a: 1 })).toBe(false);
+        expect(isRegExp(1)).toBe(false);
+        expect(isRegExp('a')).toBe(false);
+        expect(isRegExp(symbol)).toBe(false);
+    });
+
+    it('should work with regexes from another realm', () => {
+        if (realm.regexp) {
+            expect(isRegExp(realm.regexp)).toBe(true);
+        }
+    });
+});