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Contents
"use strict";
var assert = require("chai").assert
, isThenable = require("../../thenable/is");
describe("thenable/is", function () {
it("Should return true on object with `then` method", function () {
assert.equal(isThenable({ then: function () { return true; } }), true);
});
if (typeof Promise === "function") {
it("Should return true on promise", function () {
assert.equal(isThenable(Promise.resolve()), true);
});
}
it("Should return false on object with `then` non callable property", function () {
assert.equal(isThenable({ then: {} }), false);
});
it("Should return false on plain object", function () { assert.equal(isThenable({}), false); });
it("Should return false on function", function () {
assert.equal(isThenable(function () { return true; }), false);
});
it("Should return false on array", function () { assert.equal(isThenable([]), false); });
if (typeof Object.create === "function") {
it("Should return false on object with no prototype", function () {
assert.equal(isThenable(Object.create(null)), false);
});
}
it("Should return false on string", function () { assert.equal(isThenable("foo"), false); });
it("Should return false on empty string", function () { assert.equal(isThenable(""), false); });
it("Should return false on number", function () { assert.equal(isThenable(123), false); });
it("Should return false on NaN", function () { assert.equal(isThenable(NaN), false); });
it("Should return false on boolean", function () { assert.equal(isThenable(true), false); });
if (typeof Symbol === "function") {
it("Should return false on symbol", function () {
assert.equal(isThenable(Symbol("foo")), false);
});
}
it("Should return false on null", function () { assert.equal(isThenable(null), false); });
it("Should return false on undefined", function () {
assert.equal(isThenable(void 0), false);
});
});
Version data entries
30 entries across 29 versions & 2 rubygems