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4 years ago
"use strict";
var assert = require("chai").assert
, random = require("../../string/random");
var isValidFormat = RegExp.prototype.test.bind(/^[a-z0-9]+$/);
describe("string/random", function () {
it("Should return string", function () { assert.equal(typeof random(), "string"); });
it("Should return by default string of length 10", function () {
assert.equal(random().length, 10);
});
it("Should support custom charset", function () {
var charset = "abc";
var result = random({ charset: charset });
assert.equal(result.length, 10);
for (var i = 0; i < result.length; ++i) {
assert.isAtLeast(charset.indexOf(result.charAt(i)), 0);
}
});
it("Should ensure unique string with `isUnique` option", function () {
assert.notEqual(random({ isUnique: true }), random({ isUnique: true }));
});
it("Should contain only ascii chars", function () { assert(isValidFormat(random())); });
it("Should support `length` option", function () {
assert.equal(random({ length: 4 }).length, 4);
assert.equal(random({ length: 100 }).length, 100);
assert.equal(random({ length: 0 }).length, 0);
});
it("Should crash if unable to generate unique string with `isUnique` optin", function () {
random({ length: 0, isUnique: true });
assert["throws"](function () {
random({ length: 0, isUnique: true });
}, "Cannot generate random string");
});
});