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38 lines
1.3 KiB
JavaScript

"use strict";
/* eslint-disable no-empty-function */
var assert = require("@sinonjs/referee").assert;
var className = require("./class-name");
describe("className", function () {
it("returns the class name of an instance", function () {
// Because eslint-config-sinon disables es6, we can't
// use a class definition here
// https://github.com/sinonjs/eslint-config-sinon/blob/master/index.js
// var instance = new (class TestClass {})();
var instance = new (function TestClass() {})();
var name = className(instance);
assert.equals(name, "TestClass");
});
it("returns 'Object' for {}", function () {
var name = className({});
assert.equals(name, "Object");
});
it("returns null for an object that has no prototype", function () {
var obj = Object.create(null);
var name = className(obj);
assert.equals(name, null);
});
it("returns null for an object whose prototype was mangled", function () {
// This is what Node v6 and v7 do for objects returned by querystring.parse()
function MangledObject() {}
MangledObject.prototype = Object.create(null);
var obj = new MangledObject();
var name = className(obj);
assert.equals(name, null);
});
});