computed-async-mobx/built/test/asyncComputedTests.js

Define a computed by returning a Promise

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
Object.defineProperty(exports, "__esModule", { value: true });
var util_1 = require("./util");
var delay_1 = require("./delay");
var mobx_1 = require("mobx");
var index_1 = require("../src/index");
util_1.testStrictness("asyncComputed - can't be used outside of reactive contexts", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var o, r;
    return __generator(this, function (_a) {
        o = mobx_1.observable({ x: 1, y: 2 });
        r = index_1.asyncComputed(undefined, 10, function () { return __awaiter(void 0, void 0, void 0, function () {
            var result;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        result = o.x + o.y;
                        return [4 /*yield*/, delay_1.delay(100)];
                    case 1:
                        _a.sent();
                        return [2 /*return*/, result];
                }
            });
        }); });
        assert.throws(function () { return r.get(); }, /inside reactions/);
        return [2 /*return*/];
    });
}); });
util_1.testStrictness("asyncComputed - transitions to new values", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var o, r, trace, stop;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                o = mobx_1.observable({ x: 1, y: 2 });
                r = index_1.asyncComputed(99, 10, function () { return __awaiter(void 0, void 0, void 0, function () {
                    var result;
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0:
                                result = o.x + o.y;
                                return [4 /*yield*/, delay_1.delay(10)];
                            case 1:
                                _a.sent();
                                return [2 /*return*/, result];
                        }
                    });
                }); });
                trace = [];
                stop = mobx_1.autorun(function () { return trace.push(r.get()); });
                assert.deepEqual(trace, [99], "Init value until promise resolves");
                return [4 /*yield*/, util_1.waitForLength(trace, 2)];
            case 1:
                _a.sent();
                assert.deepEqual(trace, [99, 3], "First real value appears");
                mobx_1.runInAction(function () { return o.x = 5; });
                assert.deepEqual(trace, [99, 3], "No second value until promise resolves [2]");
                return [4 /*yield*/, util_1.waitForLength(trace, 3)];
            case 2:
                _a.sent();
                assert.deepEqual(trace, [99, 3, 7], "Second value appears");
                stop();
                return [2 /*return*/];
        }
    });
}); });
util_1.testStrictness("asyncComputed - can be refreshed", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var counter, r, trace, stop;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                counter = 0;
                r = index_1.asyncComputed(0, 10, function () { return __awaiter(void 0, void 0, void 0, function () {
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0: return [4 /*yield*/, delay_1.delay(10)];
                            case 1:
                                _a.sent();
                                return [2 /*return*/, ++counter];
                        }
                    });
                }); });
                trace = [];
                stop = mobx_1.autorun(function () { return trace.push(r.get()); });
                assert.deepEqual(trace, [0], "No new value until promise resolves");
                return [4 /*yield*/, util_1.waitForLength(trace, 2)];
            case 1:
                _a.sent();
                assert.deepEqual(trace, [0, 1], "First proper value appears");
                r.refresh();
                assert.deepEqual(trace, [0, 1], "No value until promise resolves [2]");
                return [4 /*yield*/, util_1.waitForLength(trace, 3)];
            case 2:
                _a.sent();
                assert.deepEqual(trace, [0, 1, 2], "Second value appears");
                stop();
                return [2 /*return*/];
        }
    });
}); });
util_1.testStrictness("asyncComputed - busy property works by itself", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var o, r, trace, stop;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                o = mobx_1.observable({ x: 1, y: 2 });
                r = index_1.asyncComputed(undefined, 10, function () { return __awaiter(void 0, void 0, void 0, function () {
                    var result;
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0:
                                result = o.x + o.y;
                                return [4 /*yield*/, delay_1.delay(10)];
                            case 1:
                                _a.sent();
                                return [2 /*return*/, result];
                        }
                    });
                }); });
                trace = [];
                stop = mobx_1.autorun(function () { return trace.push(r.busy); });
                assert.deepEqual(trace, [true], "Is initially busy");
                return [4 /*yield*/, util_1.waitForLength(trace, 2)];
            case 1:
                _a.sent();
                assert.deepEqual(trace, [true, false], "Busy transitions to false");
                mobx_1.runInAction(function () { return o.x = 5; });
                assert.deepEqual(trace, [true, false], "Doesn't synchronously transition to true, due to throttling");
                return [4 /*yield*/, util_1.waitForLength(trace, 3)];
            case 2:
                _a.sent();
                assert.deepEqual(trace, [true, false, true], "Eventually transitions to true");
                return [4 /*yield*/, util_1.waitForLength(trace, 4)];
            case 3:
                _a.sent();
                assert.deepEqual(trace, [true, false, true, false], "Second transition to false");
                stop();
                return [2 /*return*/];
        }
    });
}); });
util_1.testStrictness("asyncComputed - busy property interleaves with value changes", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var o, r, trace, stop;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                o = mobx_1.observable({ x: 1, y: 2 });
                r = index_1.asyncComputed(99, 10, function () { return __awaiter(void 0, void 0, void 0, function () {
                    var result;
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0:
                                result = o.x + o.y;
                                return [4 /*yield*/, delay_1.delay(10)];
                            case 1:
                                _a.sent();
                                return [2 /*return*/, result];
                        }
                    });
                }); });
                trace = [];
                stop = mobx_1.autorun(function () { return trace.push({ value: r.get(), busy: r.busy }); });
                assert.deepEqual(trace, [
                    { value: 99, busy: true }
                ], "No value until promise resolves");
                return [4 /*yield*/, util_1.waitForLength(trace, 2)];
            case 1:
                _a.sent();
                assert.deepEqual(trace, [
                    { value: 99, busy: true },
                    { value: 3, busy: false }
                ], "Initial value appears");
                mobx_1.runInAction(function () { return o.x = 5; });
                assert.deepEqual(trace, [
                    { value: 99, busy: true },
                    { value: 3, busy: false }
                ], "No synchronous change in busy");
                return [4 /*yield*/, util_1.waitForLength(trace, 3)];
            case 2:
                _a.sent();
                assert.deepEqual(trace, [
                    { value: 99, busy: true },
                    { value: 3, busy: false },
                    { value: 3, busy: true }
                ], "Eventually turns busy");
                return [4 /*yield*/, util_1.waitForLength(trace, 4)];
            case 3:
                _a.sent();
                assert.deepEqual(trace, [
                    { value: 99, busy: true },
                    { value: 3, busy: false },
                    { value: 3, busy: true },
                    { value: 7, busy: false }
                ], "Second value appears");
                stop();
                return [2 /*return*/];
        }
    });
}); });
util_1.testStrictness("asyncComputed - propagates exceptions", function (assert) { return __awaiter(void 0, void 0, void 0, function () {
    var o, r, trace, stop;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                o = new util_1.Obs(false);
                r = index_1.asyncComputed("Init", 10, function () { return __awaiter(void 0, void 0, void 0, function () {
                    var shouldThrow;
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0:
                                shouldThrow = o.get();
                                return [4 /*yield*/, delay_1.delay(10)];
                            case 1:
                                _a.sent();
                                if (shouldThrow) {
                                    throw new Error("Badness");
                                }
                                return [2 /*return*/, "Goodness"];
                        }
                    });
                }); });
                trace = [];
                stop = mobx_1.autorun(function () {
                    try {
                        trace.push(r.get());
                    }
                    catch (x) {
                        trace.push(x.message);
                    }
                });
                assert.deepEqual(trace, ["Init"]);
                return [4 /*yield*/, util_1.waitForLength(trace, 2)];
            case 1:
                _a.sent();
                assert.deepEqual(trace, ["Init", "Goodness"]);
                mobx_1.runInAction(function () { return o.set(true); });
                assert.deepEqual(trace, ["Init", "Goodness"], "Reactive contexts don't seem immediate changes");
                return [4 /*yield*/, util_1.waitForLength(trace, 3)];
            case 2:
                _a.sent();
                assert.deepEqual(trace, ["Init", "Goodness", "Badness"], "But do see delayed changes");
                mobx_1.runInAction(function () { return o.set(false); });
                mobx_1.runInAction(function () { return o.set(true); });
                mobx_1.runInAction(function () { return o.set(false); });
                return [4 /*yield*/, util_1.waitForLength(trace, 4)];
            case 3:
                _a.sent();
                assert.deepEqual(trace, ["Init", "Goodness", "Badness", "Badness"], "Change to busy makes us see another exception");
                return [4 /*yield*/, util_1.waitForLength(trace, 5)];
            case 4:
                _a.sent();
                assert.deepEqual(trace, ["Init", "Goodness", "Badness", "Badness", "Goodness"], "Changes are batched by throttling");
                mobx_1.runInAction(function () { return o.set(true); });
                return [4 /*yield*/, delay_1.delay(1)];
            case 5:
                _a.sent();
                mobx_1.runInAction(function () { return o.set(false); });
                mobx_1.runInAction(function () { return o.set(true); });
                return [4 /*yield*/, util_1.waitForLength(trace, 6)];
            case 6:
                _a.sent();
                assert.deepEqual(trace, ["Init", "Goodness", "Badness", "Badness", "Goodness", "Badness"], "Changes are batched again");
                stop();
                return [2 /*return*/];
        }
    });
}); });
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