我在我的Rails应用程序中使用Websocket Rails gem发送一个触发刷新部分页面的事件。一切正常,但在我的测试中(我正在使用Rspec + Capybara + Selenium)我似乎找不到等待页面响应Websocket事件的方法。我在测试中触发了这个事件:
WebsocketRails[@michael.id].trigger "refresh_task", {task: @michaels_task, modified_by: @archer}
该事件受以下约束。 ajax调用返回一个实际上是另一个ajax调用的脚本。
channel.bind('refresh_task', function(task_user) {
var task = task_user["task"];
var modified_by = task_user["modified_by"];
if ($('span[data-mahi-task-id="' + task.id +'"]').length > 0) {//if the task is currently visible
if ($('span[data-mahi-task-id="' + task.id +'"] div.modal').length > 0 ) { //the edit is open, so prompt the user
refresh_task = confirm(modified_by.name + " has modified this task, do you want to re-load? (if you don't re-load you risk overwriting their changes)");
} else {
refresh_task = true;
}
if (refresh_task == true) {
//hide the modal if it exists
$('span[data-mahi-task-id="' + task.id +'"] div.modal').modal('hide');
//grey out the task while we load => this will get removed in ready.js
$('span[data-mahi-task-id="' + task.id +'"]').addClass('ajax-disabled');
// fake a "cancel" button on the update user task which will trigger a re-load of the task
$.ajax({
url: "/users/" + task.created_by_id + "/tasks/" + task.id,
data: {task: task, update_details_cancel_button: "", _method:'put'}, //need to teel rails this is a put - not all browsers support put
dataType: 'script', //what format we expect the response to be - i.e. we want to execupte the resulting script
complete : ajaxComplete(task,modified_by),
method: 'POST' //not all browsers support put so send a POST with the data _method:'put' as above
});
}
}
});
一旦ajax启动,我可以告诉它正在运行并等待它完成,但我需要我的测试在触发事件和以某种方式启动ajax之间等待?
答案 0 :(得分:0)
我通过编写一个接受代码块的辅助方法来解决这个问题。辅助方法记录当前时间,然后向ajax start事件添加一个函数,该事件记录ajax在sessionStorage变量中启动的时间。然后我可以运行传递给方法的代码块并等待ajax如下所示:
def wait_for_ajax_to_start
start_time = Time.now.to_f * 1000 #number of milliseconds
#attach a hander on ajaxstart to store the time ajax started in a sessionStorage variable called 'ajaxStarted'
page.evaluate_script('$(document).ajaxStart(function() {sessionStorage.ajaxStarted = $.now()})')
#run the code block passed to this method
yield
#wait until the ajax has started or timeout
Timeout.timeout(Capybara.default_wait_time) do #timeout after the default wait time
loop until (page.evaluate_script('sessionStorage.ajaxStarted') != nil) && (page.evaluate_script('sessionStorage.ajaxStarted').to_i >= start_time)
end
end
我像这样调用辅助方法:
wait_for_ajax_to_start {
WebsocketRails[@michael.id].trigger "refresh_task", {task: @michaels_task, modified_by: @archer}
}
到目前为止,这似乎对我有用....
答案 1 :(得分:0)
您的测试应该等待刷新导致的页面上的可见更改