javascript - 如何使用 jasmine 测试具有 setTimeout 的函数？

Question

我需要为内部调用了 setTimeout() 的函数编写测试，但我找不到我应该怎么做。

这是函数

// 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();
    } );
};

这是我的测试

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。

Jasmine 1.3

你可以使用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 );
        });
    });
});

还有第三种方法，不需要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 );
    });
});

Jasmine 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()
});