Is there a difference between callback() and return callback() in coffeescript. I've gotten different answers from different people. If there is a block of code after just a callback, the callback function gets called but does the rest of the script continues to run or just it does stops there?
if something
callback null, 'yes'
else
callback null, 'no'
// DOES THIS RUN?
if something else
callback null, 'yes'
Normally, the rest continues to run, but with a return, you can prevent that.
Related
I am new to protractor-cucumber. I am trying to execute below step definition from protractor conf.js.
this.Given(/^I go to sparqHomePage$/, function (callback) {
homepage.goToHomePage()
homepage.login(data[0].UserName,data[0].Password).then(callback);
});
this.Then(/^I create a process$/, function () {
homepage.clickDesign();
homepage.clickFlowDesigner();
console.log(params.flow.procName + ' '+ params.flow.procDesc);
designPage.createNewProc(params.flow.procName, params.flow.procDesc);
});
this.Then(/^I should see process is saved in db$/, function (callback) {
var sql = "select * from process where name = ?";
sql = mysql.format(sql, params.flow.procName);
console.log(sql);
dbConn.query(sql, function(err, rows, fields){
if(!err) {
procDbObj = rows;
console.log(rows);
expect(procDbObj[0].name).to.eventually.equal( params.flow.procName);
expect(procDbObj[0].description).to.eventually.equal(params.flow.procDesc).and.notify(callback);
}
});
});
As soon as I start the execution, the console log shows, feature file execution was completed, but the actual execution is not yet completed.
In my 3rd step I am doing some db validation based on the step 1 and step 2 actions. As cucumber trying to execute all the steps before the completion of real execution with browser, my 3rd test is always failing.
How can I make cucumber to wait for step execution is completed before moving to the next step.
You are calling
homepage.goToHomePage() and homepage.login(data[0].UserName,data[0].Password).then(callback);. Are both methods correct promises that are correctly handled? It now looks like it is calling both methods but giving a direct callback before resolving the promise.
As Ross stated, you can also chain the promises, but first be sure the promises are correctly handled
Edit:
As Ross stated, you can also chain the promises, but first be sure the promises are correctly handled.
You can also return the promise in stead of the callback, just use it as this
this.Given(/^I go to sparqHomePage$/, function () {
homepage.goToHomePage();
return homepage.login(data[0].UserName,data[0].Password);
});
homepage.goToHomePage()
homepage.login(data[0].UserName,data[0].Password).then(callback);
I'm not sure exactly what is happening in the first line but I assume thats going to be doing a click, you will need to make that return a promise and re-write it like
homepage.goToHomePage().then(()=>{
homepage.login(data[0].UserName,data[0].Password).then(callback);
})
And then follow this pattern for the rest of your code as I can see this same issue throughout
The below portion of my code caused recursive call on onEditorExit method. If I remove setData call, then no recursion occur.
What can be the workaround?
myGrid.addEditorExitHandler(new EditorExitHandler() {
public void onEditorExit(EditorExitEvent event) {
GWT.log("Hello");
myGrid.setData(new ListGridRecord());
}
});
Now check the console output -
Console Screenshot
It won't work because each time you call setData() the editor will fire an editorExit event in an infinite loop (not recursively). By the way, calling setData() in the way you are doing will replace all your records in the ListGrid with one new empty record. This seems like a disconcerting user experience.
It looks like you want to create and start editing a new record when you tab out of the last one. In order to do that in a ListGrid, you use:
grid.setListEndEditAction(RowEndEditAction.NEXT);
That's all you need to do in order to get it working.
As documentation says IEnumerator methods are executed like thread, but I'm confused why
AssetBundleCreateRequest assetBundleCreateRequest = AssetBundle.CreateFromMemory(ByteArray);
yield return assetBundleCreateRequest;
freezes my game for 2 seconds. Can anybody explain?
Well it freezes for 2 seconds because that is what you are actually requesting with your yield return assetBundleCreateRequest
Asynchronous operation coroutine.
You can yield until asynchronous operation continues, or manually check whether it's done (isDone) or progress (progress). AsyncOperation
So right now you are requesting your coroutine to wait till your assetbundlecreaterequest is done.
For manually checking wheter the function is done, without having to freeze your application would be using the isdone or progress command instead
If you need further clarification feel free to comment.
Edit
Sample of using isdone
AssetBundleCreateRequest acr = AssetBundle.CreateFromMemory(decryptedData);
while (!acr.isDone)
{
yield;
}
AssetBundle bundle = acr.assetBundle;
I have a GXT 3 TextArea on which I catch copy-paste events. On this event, I would like to get the text that is inside the textarea.
Problem : the textarea still has the focus so the value is not updated. Hence, getValue() returns an empty string...
I tried to call getValue() getCurrentValue() flush() validate().
I also tried to extend TextArea to have access to blur() method and call it before getting the value : it makes no difference.
Any solution? (even solution with GWT components would be appreciated).
Without seeing the code you have, it is difficult to say for sure. But at a guess, you are listening to the event, and invoking getCurrentValue() (the correct call in this case) right away.
This is wrong - it is possible for the event handler to call preventDefault(), to cancel the default behavior of that event for most events that can take place. After the event handler returns, only then does the browser actually perform the action (paste or drawing the key that was pressed). The solution to this is to wait a moment before trying to read, to wait until after the action has been completed. The simplest way to achieve this is to schedule a deferred command after the event has occurred, and read the field's value then.
//in the event handler of your choice...
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
#Override
public void execute() {
String pastedValue = field.getCurrentValue();
//do something with the value now
}
});
Before getting the value you can call
yourTextField.finishEditing();
After it method getValue() should return the value of the field. If you would like to keep this field focused after getting the value you can always call
yourTexField.focus();
I've tried:
console.log(element('.users').html());
but the only thing I get is
LOG: { name: 'element \'.users\' html', fulfilled: false }
I assume you are using Angular scenario runner.
The element().html() dsl returns a future (see wikipedia). You are logging the future that will eventually contain the element, but at the point when you are calling console.log, the future is not resolved yet - there is no value in there.
Try this:
element('.users').query(function(elm, done) {
console.log(elm.html());
done();
});
The whole scenario runner works as a queue. The test code is executed (synchronously) and each command (eg. element().html in your case) adds some action into this queue. Then, these actions are executed asynchronously - once first action finishes (by calling done()), the second action is executed, etc... Therefore the individual actions can be asynchronous, but the test code is synchronous, which is more readable.