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'use strict';
describe('$defer', function() {
var scope, $browser, $defer, $exceptionHandler;
beforeEach(function() {
scope = angular.scope(angular.service,
{'$exceptionHandler': jasmine.createSpy('$exceptionHandler')});
$browser = scope.$service('$browser');
$defer = scope.$service('$defer');
$exceptionHandler = scope.$service('$exceptionHandler');
});
afterEach(function() {
dealoc(scope);
});
it('should delegate functions to $browser.defer', function() {
var counter = 0;
$defer(function() { counter++; });
expect(counter).toBe(0);
$browser.defer.flush();
expect(counter).toBe(1);
$browser.defer.flush(); //does nothing
expect(counter).toBe(1);
expect($exceptionHandler).not.toHaveBeenCalled();
});
it('should delegate exception to the $exceptionHandler service', function() {
$defer(function() {throw "Test Error";});
expect($exceptionHandler).not.toHaveBeenCalled();
$browser.defer.flush();
expect($exceptionHandler).toHaveBeenCalledWith("Test Error");
});
it('should call $apply after each callback is executed', function() {
var applySpy = this.spyOn(scope, '$apply').andCallThrough();
$defer(function() {});
expect(applySpy).not.toHaveBeenCalled();
$browser.defer.flush();
expect(applySpy).toHaveBeenCalled();
applySpy.reset(); //reset the spy;
$defer(function() {});
$defer(function() {});
$browser.defer.flush();
expect(applySpy.callCount).toBe(2);
});
it('should call $apply even if an exception is thrown in callback', function() {
var applySpy = this.spyOn(scope, '$apply').andCallThrough();
$defer(function() {throw "Test Error";});
expect(applySpy).not.toHaveBeenCalled();
$browser.defer.flush();
expect(applySpy).toHaveBeenCalled();
});
it('should allow you to specify the delay time', function() {
var defer = this.spyOn($browser, 'defer');
$defer(noop, 123);
expect(defer.callCount).toEqual(1);
expect(defer.mostRecentCall.args[1]).toEqual(123);
});
it('should return a cancelation token', function() {
var defer = this.spyOn($browser, 'defer').andReturn('xxx');
expect($defer(noop)).toEqual('xxx');
});
describe('cancel', function() {
it('should cancel tasks', function() {
var task1 = jasmine.createSpy('task1'),
task2 = jasmine.createSpy('task2'),
task3 = jasmine.createSpy('task3'),
token1, token3;
token1 = $defer(task1);
$defer(task2);
token3 = $defer(task3, 333);
$defer.cancel(token3);
$defer.cancel(token1);
$browser.defer.flush();
expect(task1).not.toHaveBeenCalled();
expect(task2).toHaveBeenCalledOnce();
expect(task3).not.toHaveBeenCalled();
});
it('should return true if a task was succesffuly canceled', function() {
var task1 = jasmine.createSpy('task1'),
task2 = jasmine.createSpy('task2'),
token1, token2;
token1 = $defer(task1);
$browser.defer.flush();
token2 = $defer(task2);
expect($defer.cancel(token1)).toBe(false);
expect($defer.cancel(token2)).toBe(true);
});
});
});
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