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<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
// Complete TaskManager Class to pass tests

// List of "tasks" to execute, includes invalid tasks
'use strict';

var TASKS_POOL = ['new Error("wrong item in tasks pool")', function (resolve) {
  setTimeout(function () {
    resolve(1);
  }, 0);
}, function (resolve) {
  setTimeout(function () {
    resolve(2);
  }, 100);
}, null, function () {
  return 3;
}];

// Class Task Manager
function TaskManager(tasks) {
  this.tasks = tasks;
  /* your code */
}

// Method to execute all tasks asynchronously
TaskManager.prototype.async = function (logger) {/* your code */};

// Method to execute all tasks synchronously
TaskManager.prototype.sync = function (logger) {/* your code */};

var taskManager = new TaskManager(TASKS_POOL);

// Tests
taskManager.sync(function (result) {
  console.log('Sync test is %s', result === '123' ? 'passed' : 'not passed');
});

var taskManager2 = new TaskManager(TASKS_POOL);

taskManager2.async(function (result) {
  console.log('Async test is %s', result === '312' ? 'passed' : 'not passed');
});
</script>


<script id="jsbin-source-javascript" type="text/javascript">// Complete TaskManager Class to pass tests

// List of "tasks" to execute, includes invalid tasks
const TASKS_POOL = [
  'new Error("wrong item in tasks pool")',
  function(resolve) {
    setTimeout(function() {
      resolve(1);
    }, 0);
  },
  function(resolve) {
    setTimeout(function() {
       resolve(2);
    }, 100);
  },
  null,
  function() {
    return 3;
  }
];

// Class Task Manager
function TaskManager(tasks) {
  this.tasks = tasks;
  /* your code */
}

// Method to execute all tasks asynchronously
TaskManager.prototype.async = function(logger) {/* your code */};

// Method to execute all tasks synchronously
TaskManager.prototype.sync = function(logger) {/* your code */};

const taskManager = new TaskManager(TASKS_POOL);

// Tests
taskManager.sync(function(result) {
  console.log('Sync test is %s', result === '123' ? 'passed' : 'not passed');
});

const taskManager2 = new TaskManager(TASKS_POOL);

taskManager2.async(function(result) {
  console.log('Async test is %s', result === '312' ? 'passed' : 'not passed');
});

</script></body>
</html>