wait-for-expect
Version:
Wait for expectation to be true, useful for integration and end to end testing
122 lines (119 loc) • 8.19 kB
JavaScript
;
require("./toBeInRangeMatcher");
var _index = _interopRequireDefault(require("./index"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function _regenerator() { /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE */ var e, t, r = "function" == typeof Symbol ? Symbol : {}, n = r.iterator || "@@iterator", o = r.toStringTag || "@@toStringTag"; function i(r, n, o, i) { var c = n && n.prototype instanceof Generator ? n : Generator, u = Object.create(c.prototype); return _regeneratorDefine2(u, "_invoke", function (r, n, o) { var i, c, u, f = 0, p = o || [], y = !1, G = { p: 0, n: 0, v: e, a: d, f: d.bind(e, 4), d: function d(t, r) { return i = t, c = 0, u = e, G.n = r, a; } }; function d(r, n) { for (c = r, u = n, t = 0; !y && f && !o && t < p.length; t++) { var o, i = p[t], d = G.p, l = i[2]; r > 3 ? (o = l === n) && (u = i[(c = i[4]) ? 5 : (c = 3, 3)], i[4] = i[5] = e) : i[0] <= d && ((o = r < 2 && d < i[1]) ? (c = 0, G.v = n, G.n = i[1]) : d < l && (o = r < 3 || i[0] > n || n > l) && (i[4] = r, i[5] = n, G.n = l, c = 0)); } if (o || r > 1) return a; throw y = !0, n; } return function (o, p, l) { if (f > 1) throw TypeError("Generator is already running"); for (y && 1 === p && d(p, l), c = p, u = l; (t = c < 2 ? e : u) || !y;) { i || (c ? c < 3 ? (c > 1 && (G.n = -1), d(c, u)) : G.n = u : G.v = u); try { if (f = 2, i) { if (c || (o = "next"), t = i[o]) { if (!(t = t.call(i, u))) throw TypeError("iterator result is not an object"); if (!t.done) return t; u = t.value, c < 2 && (c = 0); } else 1 === c && (t = i["return"]) && t.call(i), c < 2 && (u = TypeError("The iterator does not provide a '" + o + "' method"), c = 1); i = e; } else if ((t = (y = G.n < 0) ? u : r.call(n, G)) !== a) break; } catch (t) { i = e, c = 1, u = t; } finally { f = 1; } } return { value: t, done: y }; }; }(r, o, i), !0), u; } var a = {}; function Generator() {} function GeneratorFunction() {} function GeneratorFunctionPrototype() {} t = Object.getPrototypeOf; var c = [][n] ? t(t([][n]())) : (_regeneratorDefine2(t = {}, n, function () { return this; }), t), u = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(c); function f(e) { return Object.setPrototypeOf ? Object.setPrototypeOf(e, GeneratorFunctionPrototype) : (e.__proto__ = GeneratorFunctionPrototype, _regeneratorDefine2(e, o, "GeneratorFunction")), e.prototype = Object.create(u), e; } return GeneratorFunction.prototype = GeneratorFunctionPrototype, _regeneratorDefine2(u, "constructor", GeneratorFunctionPrototype), _regeneratorDefine2(GeneratorFunctionPrototype, "constructor", GeneratorFunction), GeneratorFunction.displayName = "GeneratorFunction", _regeneratorDefine2(GeneratorFunctionPrototype, o, "GeneratorFunction"), _regeneratorDefine2(u), _regeneratorDefine2(u, o, "Generator"), _regeneratorDefine2(u, n, function () { return this; }), _regeneratorDefine2(u, "toString", function () { return "[object Generator]"; }), (_regenerator = function _regenerator() { return { w: i, m: f }; })(); }
function _regeneratorDefine2(e, r, n, t) { var i = Object.defineProperty; try { i({}, "", {}); } catch (e) { i = 0; } _regeneratorDefine2 = function _regeneratorDefine(e, r, n, t) { function o(r, n) { _regeneratorDefine2(e, r, function (e) { return this._invoke(r, n, e); }); } r ? i ? i(e, r, { value: n, enumerable: !t, configurable: !t, writable: !t }) : e[r] = n : (o("next", 0), o("throw", 1), o("return", 2)); }, _regeneratorDefine2(e, r, n, t); }
function asyncGeneratorStep(n, t, e, r, o, a, c) { try { var i = n[a](c), u = i.value; } catch (n) { return void e(n); } i.done ? t(u) : Promise.resolve(u).then(r, o); }
function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; } /* eslint-env jest */
// this is a copy of "it waits for expectation to pass" modified to use jestFakeTimers and two ways of Date.now mocking
// This breakes when we remove the const { setTimeout, Date: { now } } = typeof window !== "undefined" ? window : global;
// line from the index.ts
beforeEach(function () {
jest.resetModules();
jest.restoreAllMocks();
jest.useRealTimers();
});
test("it always uses real timers even if they were set to fake before importing the module", /*#__PURE__*/_asyncToGenerator(/*#__PURE__*/_regenerator().m(function _callee() {
var importedWaitForExpect, numberToChange, randomTimeout;
return _regenerator().w(function (_context) {
while (1) switch (_context.n) {
case 0:
jest.useFakeTimers();
/* eslint-disable global-require */
importedWaitForExpect = require("./index");
jest.useRealTimers();
numberToChange = 10; // we are using random timeout here to simulate a real-time example
// of an async operation calling a callback at a non-deterministic time
randomTimeout = Math.floor(Math.random() * 300);
setTimeout(function () {
numberToChange = 100;
}, randomTimeout);
jest.useFakeTimers();
_context.n = 1;
return importedWaitForExpect(function () {
expect(numberToChange).toEqual(100);
});
case 1:
return _context.a(2);
}
}, _callee);
})));
// Date.now might be mocked with two main ways:
// via mocking whole Date, or by mocking just Date.now
// hence two test cases covered both ways
test("it works even if the Date was mocked", /*#__PURE__*/_asyncToGenerator(/*#__PURE__*/_regenerator().m(function _callee2() {
var numberToChange, expectFailingMessage, _t;
return _regenerator().w(function (_context2) {
while (1) switch (_context2.p = _context2.n) {
case 0:
/* eslint-disable no-global-assign */
// @ts-ignore: Cannot reassign to const Date
Date = jest.fn(function () {
return {
now: function now() {
return 1482363367071;
}
};
});
/* eslint-enable */
numberToChange = 10;
setTimeout(function () {
numberToChange = 100;
}, 100);
_context2.p = 1;
_context2.n = 2;
return (0, _index["default"])(function () {
expect(numberToChange).toEqual(101);
}, 1000);
case 2:
_context2.n = 4;
break;
case 3:
_context2.p = 3;
_t = _context2.v;
expectFailingMessage = _t.message;
case 4:
expect(expectFailingMessage).toMatch(/toEqual/);
expect(expectFailingMessage).toMatch("101");
expect(expectFailingMessage).toMatch("Received:");
expect(expectFailingMessage).toMatch("100");
case 5:
return _context2.a(2);
}
}, _callee2, null, [[1, 3]]);
})));
test("it works even if the Date.now was mocked", /*#__PURE__*/_asyncToGenerator(/*#__PURE__*/_regenerator().m(function _callee3() {
var numberToChange, expectFailingMessage, _t2;
return _regenerator().w(function (_context3) {
while (1) switch (_context3.p = _context3.n) {
case 0:
Date.now = jest.fn(function () {
return 1482363367071;
});
numberToChange = 10;
setTimeout(function () {
numberToChange = 100;
}, 100);
_context3.p = 1;
_context3.n = 2;
return (0, _index["default"])(function () {
expect(numberToChange).toEqual(101);
}, 1000);
case 2:
_context3.n = 4;
break;
case 3:
_context3.p = 3;
_t2 = _context3.v;
expectFailingMessage = _t2.message;
case 4:
expect(expectFailingMessage).toMatch(/toEqual/);
expect(expectFailingMessage).toMatch("101");
expect(expectFailingMessage).toMatch("Received:");
expect(expectFailingMessage).toMatch("100");
case 5:
return _context3.a(2);
}
}, _callee3, null, [[1, 3]]);
})));