@ars9/decay
Version:
A library for numeric values decaying with time
196 lines (195 loc) • 8.46 kB
JavaScript
;
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 });
exports.wait = void 0;
var index_1 = require("./index");
function wait(ms) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2, new Promise(function (resolve) { return setTimeout(resolve, ms); })];
});
});
}
exports.wait = wait;
describe('Decay', function () {
it("should initialize with empty config", function () {
var decay = new index_1.Decay();
expect(decay).toBeInstanceOf(index_1.Decay);
});
it("should work with default config", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay();
decay.start();
return [4, wait(1010)];
case 1:
_a.sent();
expect(decay.value).toBe(0);
decay.stop();
return [2];
}
});
}); });
it("should trigger wait on min value", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, value;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay({ interval: 10 });
decay.start();
return [4, decay.wait()];
case 1:
value = _a.sent();
expect(value).toBe(0);
decay.stop();
return [2];
}
});
}); });
it("should trigger wait on max value", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, promise, value;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay({ interval: 10, maxValue: 10, decayValue: 0.0001 });
decay.start();
promise = decay.wait();
decay.value = 1000;
return [4, promise];
case 1:
value = _a.sent();
expect(value).toBe(10);
decay.stop();
return [2];
}
});
}); });
it("should trigger wait on stop", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, promise, value;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay();
decay.start();
promise = decay.wait();
decay.stop();
return [4, promise];
case 1:
value = _a.sent();
expect(value).toBe(1);
return [2];
}
});
}); });
it("should emit on min", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, triggerValue;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay({ interval: 10 });
decay.on('min', function (v) { return (triggerValue = v); });
decay.start();
return [4, decay.wait()];
case 1:
_a.sent();
decay.stop();
expect(triggerValue).toBe(0);
return [2];
}
});
}); });
it("should emit on max", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, triggerValue;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay({ interval: 10, maxValue: 10 });
decay.on('max', function (v) { return (triggerValue = v); });
decay.start();
decay.increment(1000);
return [4, decay.wait()];
case 1:
_a.sent();
decay.stop();
expect(triggerValue).toBe(10);
return [2];
}
});
}); });
it("should emit on stop", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, triggerValue;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay();
decay.on('stop', function (v) { return (triggerValue = v); });
decay.start();
decay.stop();
return [4, wait(10)];
case 1:
_a.sent();
expect(triggerValue).toBe(1);
return [2];
}
});
}); });
it("should decay exponentially", function () { return __awaiter(void 0, void 0, void 0, function () {
var decay, t0, dt;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
decay = new index_1.Decay({
interval: 10,
decayValue: 0.1,
type: index_1.DecayType.Exponential,
});
t0 = Date.now();
decay.start();
return [4, decay.wait()];
case 1:
_a.sent();
decay.stop();
dt = Date.now() - t0;
expect(dt).toBeLessThan(40);
return [2];
}
});
}); });
});