如何用茉莉花测试具有setTimeout的函数？

Question

我需要为内部具有setTimeout()调用的函数编写测试，但是我找不到应该怎么做。

这是功能

// Disables all submit buttons after a submit button is pressed.
var block_all_submit_and_ajax = function( el ) {
    // Clone the clicked button, we need to know what button has been clicked so that we can react accordingly
    var $clone = $( el ).clone();
    // Change the type to hidden
    $clone.attr( 'type', 'hidden' );
    // Put the hidden button in the DOM
    $( el ).after( $clone );
    // Disable all submit button. I use setTimeout otherwise this doesn't work in chrome.
    setTimeout(function() {
         $( '#facebook input[type=submit]' ).prop( 'disabled', true );
     }, 10);
    // unbind all click handler from ajax
    $( '#facebook a.btn' ).unbind( "click" );
    // Disable all AJAX buttons.
    $( '#facebook a.btn' ).click( function( e ) {
        e.preventDefault();
        e.stopImmediatePropagation();
    } );
};

这是我的考验

it( "Disable all submit buttons", function() {
    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );
    // Call the function
    utility_functions.block_all_submit_and_ajax( $button.get(0) );
    // check that all submit are disabled
    $( '#facebook input[type=submit]' ).each( function( i, el ) {
        console.log( 'f' );
        expect( el ).toHaveProp( 'disabled', true );
    } );
} );

我试过使用jasmine.Clock.useMock(); 和jasmine.Clock.tick(11); 但我无法正常工作，测试从未通过

Answer 1

整体方法因您的Jasmine版本而异。

茉莉花1.3

您可以使用waitsFor ：

it( "Disable all submit buttons", function() {
    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );
    // Call the function
    utility_functions.block_all_submit_and_ajax( $button.get(0) );

    // Wait 100ms for all elements to be disabled.
    waitsFor('button to be disabled', function(){
        var found = true;
        // check that all submit are disabled
        $( '#facebook input[type=submit]' ).each( function( i, el ) {
            if (!el.prop('disabled')) found = false;
        });
        return found;
    }, 100);
});

如果您确切知道需要多长时间，也可以使用waits ：

it( "Disable all submit buttons", function() {
    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );
    // Call the function
    utility_functions.block_all_submit_and_ajax( $button.get(0) );

    // Wait 20ms before running 'runs' section.
    waits(20);

    runs(function(){
        // check that all submit are disabled
        $( '#facebook input[type=submit]' ).each( function( i, el ) {
            expect( el ).toHaveProp( 'disabled', true );
        });
    });
});

也有这样做的第三条道路，而无需waits ， waitsFor和runs 。

it( "Disable all submit buttons", function() {
    jasmine.Clock.useMock();

    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );
    // Call the function
    utility_functions.block_all_submit_and_ajax( $button.get(0) );

    jasmine.Clock.tick(10);

    // check that all submit are disabled
    $( '#facebook input[type=submit]' ).each( function( i, el ) {
        expect( el ).toHaveProp( 'disabled', true );
    });
});

茉莉花2.0

您可以使用done ，测试回调：

it( "Disable all submit buttons", function(done) {
    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );

    utility_functions.block_all_submit_and_ajax( $button.get(0) );

    setTimeout(function(){
        // check that all submit are disabled
        $( '#facebook input[type=submit]' ).each( function( i, el ) {
            expect( el ).toHaveProp( 'disabled', true );
        });

        // Let Jasmine know the test is done.
        done();
    }, 20);
});

您可以模拟计时器行为：

it( "Disable all submit buttons", function() {
    jasmine.clock().install();

    // Get a button
    var $button = $( '#ai1ec_subscribe_users' );
    // Call the function
    utility_functions.block_all_submit_and_ajax( $button.get(0) );

    jasmine.clock().tick(10);

    // check that all submit are disabled
    $( '#facebook input[type=submit]' ).each( function( i, el ) {
        expect( el ).toHaveProp( 'disabled', true );
    });

    jasmine.clock().uninstall()
});

Answer 2

我从未用茉莉花做过任何测试，但我想我理解您的问题。 我将对代码进行一些重组，以允许您将正在调用的函数包装在这样的代理函数中：

修改正在测试的代码以将setTimeout代码提取到另一个函数中：

原始代码：

// Disables all submit buttons after a submit button is pressed. 
var block_all_submit_and_ajax = function( el ) { 
    // Clone the clicked button, we need to know what button has been clicked so that we can react accordingly 
    var $clone = $( el ).clone(); 
    // Change the type to hidden 
    $clone.attr( 'type', 'hidden' ); 
    // Put the hidden button in the DOM 
    $( el ).after( $clone ); 
    // Disable all submit button. I use setTimeout otherwise this doesn't work in chrome. 
    setTimeout(function() { 
        $( '#facebook input[type=submit]' ).prop( 'disabled', true ); 
    }, 10); 
    // unbind all click handler from ajax 
    $( '#facebook a.btn' ).unbind( "click" ); 
    // Disable all AJAX buttons. 
    $( '#facebook a.btn' ).click( function( e ) { 
        e.preventDefault(); 
        e.stopImmediatePropagation(); 
    } ); 
};

修改后的代码：

// Disables all submit buttons after a submit button is pressed. 
var block_all_submit_and_ajax = function( el ) { 
    // Clone the clicked button, we need to know what button has been clicked so that we can react accordingly 
    var $clone = $( el ).clone(); 
    // Change the type to hidden 
    $clone.attr( 'type', 'hidden' ); 
    // Put the hidden button in the DOM 
    $( el ).after( $clone ); 
    // Disable all submit button. I use setTimeout otherwise this doesn't work in chrome. 
    setTimeout(disableSubmitButtons, 10); 
    // unbind all click handler from ajax 
    $( '#facebook a.btn' ).unbind( "click" ); 
    // Disable all AJAX buttons. 
    $( '#facebook a.btn' ).click( function( e ) { 
        e.preventDefault(); 
        e.stopImmediatePropagation(); 
    } ); 
};

var utilityFunctions =
{
  disableSubmitButtons : function()
  {
    $( '#facebook input[type=submit]' ).prop( 'disabled', true ); 

  }
}

接下来，我将像这样修改测试代码：

it( "Disable all submit buttons", function() { 
    // Get a button 
    var $button = $( '#ai1ec_subscribe_users' ); 

    var originalFunction = utilityFunctions.disableSubmitButtons;
    utilityFunctions.disableSubmitButtons = function()
    {
        // call the original code, and follow it up with the test
        originalFunction();

        // check that all submit are disabled 
        $( '#facebook input[type=submit]' ).each( function( i, el ) { 
            console.log( 'f' ); 
            expect( el ).toHaveProp( 'disabled', true ); 
        }); 

        // set things back the way they were
        utilityFunctions.disableSubmitButtons = originalFunction;
    }

    // Call the function 
    utility_functions.block_all_submit_and_ajax( $button.get(0) ); 
}); 

Answer 3

从Jasmine 2开始，语法已更改： http : //jasmine.github.io/2.0/introduction.html#section-Asynchronous_Support

现在，您可以简单地将done回调传递给beforeEach ， it和afterEach ：

it('tests something async', function(done) {
    setTimeout(function() {
        expect(somethingSlow).toBe(true);
        done();
    }, 400);
});

更新：自编写此async/await以来，现在还可以使用async/await ，这将是我的首选方法。

Answer 4

对于使用谷歌搜索的任何人，可以找到更好的答案计时器测试

import { fakeAsync, tick, discardPeriodicTasks } from '@angular/core/testing';

it('polls statusStore.refreshStatus on an interval', fakeAsync(() => {
  spyOn(mockStatusStore, 'refreshStatus').and.callThrough();
  component.ngOnInit();
  expect(mockStatusStore.refreshStatus).not.toHaveBeenCalled();
  tick(3001);
  expect(mockStatusStore.refreshStatus).toHaveBeenCalled();
  tick(3001);
  expect(mockStatusStore.refreshStatus).toHaveBeenCalledTimes(2);
  discardPeriodicTasks();
 }));