go-types/test/isThenableTest.js

Type-checking utilities for JavaScript

"use strict";

var assert = require("chai").assert;
var isThenable = require("../src/isThenable");

suite("#isThenable", function () {

    test("true", function () {
        assert.equal(isThenable({then: function () {}}), true);

        if (typeof Promise !== "undefined") {
            assert.equal(isThenable(Promise.resolve(1)), true);
        }
    });

    test("false", function () {
        assert.equal(isThenable(), false);
        assert.equal(isThenable({ catch : function () {}}), false);
        assert.equal(isThenable({then: true}), false);
    });
});