@netdata/charts/dist/helpers/makeExecuteLatest/index.test.js

Netdata frontend SDK and chart utilities

"use strict";

var _ = _interopRequireDefault(require("."));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
describe("makeExecuteLatest", function () {
  var executeLatest;
  beforeEach(function () {
    executeLatest = (0, _["default"])();
    jest.useFakeTimers();
  });
  afterEach(function () {
    jest.useRealTimers();
  });
  it("executes callback after timeout", function () {
    var callback = jest.fn();
    var execute = executeLatest.add(callback);
    execute("arg1", "arg2");
    expect(callback).not.toBeCalled();
    jest.runAllTimers();
    expect(callback).toBeCalledWith("arg1", "arg2");
  });
  it("cancels previous timeout when called again", function () {
    var callback = jest.fn();
    var execute = executeLatest.add(callback);
    execute("first");
    execute("second");
    jest.runAllTimers();
    expect(callback).toBeCalledTimes(1);
    expect(callback).toBeCalledWith("second");
  });
  it("handles multiple execute functions", function () {
    var callback1 = jest.fn();
    var callback2 = jest.fn();
    var execute1 = executeLatest.add(callback1);
    var execute2 = executeLatest.add(callback2);
    execute1("first");
    execute2("second");
    jest.runAllTimers();
    expect(callback1).toBeCalledWith("first");
    expect(callback2).toBeCalledWith("second");
  });
  it("clears all pending timeouts", function () {
    var callback1 = jest.fn();
    var callback2 = jest.fn();
    var execute1 = executeLatest.add(callback1);
    var execute2 = executeLatest.add(callback2);
    execute1("first");
    execute2("second");
    executeLatest.clear();
    jest.runAllTimers();
    expect(callback1).not.toBeCalled();
    expect(callback2).not.toBeCalled();
  });
  it("clears previous timeout before setting new one", function () {
    var callback = jest.fn();
    var execute = executeLatest.add(callback);
    execute("first");
    var firstTimeoutId = setTimeout(function () {}, 0);
    execute("second");
    jest.runAllTimers();
    expect(callback).toBeCalledTimes(1);
    expect(callback).toBeCalledWith("second");
  });
});