zurvan/tests/ImmediateCancellingTests.js

A library for simulating time in Node.js

'use strict';
var assert = require('assert');
var TimeUnit = require('../TimeUnit');
var zurvan = require('../zurvan');

describe('zurvan', function() {
  describe('while manages immediates with strict configuration', function() {
    it('throws on clearing of non-existent immediate', function() {
      var immediate;
      var called;
      return zurvan
        .interceptTimers({ throwOnInvalidClearTimer: true })
        .then(function() {
          immediate = setImmediate(function() {
            called = true;
          });
          clearImmediate(immediate);
          return zurvan.waitForEmptyQueue();
        })
        .then(function() {
          assert(!called);
        })
        .then(function() {
          return zurvan.releaseTimers();
        })
        .then(function() {
          return zurvan.interceptTimers({ throwOnInvalidClearTimer: true });
        })
        .then(function() {
          clearImmediate(immediate);
        })
        .then(
          function() {
            return zurvan.releaseTimers().then(
              function() {
                throw new Error(
                  'Should not be able to clear unexistent immediate'
                );
              },
              function() {
                throw new Error(
                  'Should not be able to clear unexistent immediate'
                );
              }
            );
          },
          function(err) {
            assert(err instanceof Error);
            assert(
              new RegExp('Invalid UID during clearing immediate').test(
                err.message
              )
            );
            return zurvan.releaseTimers();
          }
        );
    });
  });
  describe('while manages immediates without strict configuration', function() {
    it('ignores clearing of non-existent immediate', function() {
      var immediate;
      var called;
      return zurvan
        .interceptTimers()
        .then(function() {
          immediate = setImmediate(function() {
            called = true;
          });
          clearImmediate(immediate);
          return zurvan.waitForEmptyQueue();
        })
        .then(function() {
          assert(!called);
        })
        .then(function() {
          return zurvan.releaseTimers();
        })
        .then(function() {
          return zurvan.interceptTimers();
        })
        .then(function() {
          clearImmediate(immediate);
        })
        .then(function() {
          return zurvan.releaseTimers();
        });
    });
  });
});