@qntm-code/utils/dist/mjs/type-predicates/isRegExp.spec.js

A collection of useful utility functions with associated TypeScript types. All functions have been unit tested.

import { isRegExp } from './isRegExp';
describe(`isRegExp`, () => {
    it(`should return true if value is a RegExp`, () => {
        const value = /x/;
        expect(isRegExp(value)).toBe(true);
    });
    it(`should return true if value is a RegExp (constructor)`, () => {
        const value = new RegExp('x');
        expect(isRegExp(value)).toBe(true);
    });
    it(`should return false if value is not a RegExp`, () => {
        const value = RegExp;
        expect(isRegExp(value)).toBe(false);
    });
    it(`should return false if value is a string`, () => {
        const value = '/x/';
        expect(isRegExp(value)).toBe(false);
    });
});