Is it more efficient to declare a variable or directly return the variable from the Element's getText() promise in Protractor?

Question

Is it more efficient to declare a variable or directly return the variable from the Element's getText() promise in Protractor?

I am facing a scenario where I need to retrieve the text of a web element using a promise and then extract a specific part of the string for further processing.

Which example, the one at the top or the bottom, should I use?

var id = element(by.binding('smsDetails.message')).getText().then(function(message){
    var messageArray = msg.split("\n");
    var indexPosition = messageArray[0].indexOf("ID");
    id = messageArray[0].substr(indexPosition + 5, 10); 
    return id;
});

var id;
element(by.binding('smsDetails.message')).getText().then(function(message){
    var messageArray = msg.split("\n");
    var indexPosition = messageArray[0].indexOf("ID");
    id = messageArray[0].substr(indexPosition + 5, 10); 
});

javascript angularjs selenium promise protractor

Answer 1

Answer №1

When using the getText() function, be sure to capture the string value it returns. The second method outlined is suitable for this purpose.

However, a potential issue with this approach is that Protractor's return of the string value is asynchronous. Therefore, it is important to wait until the text value is received before proceeding with any necessary operations.

Here is a suggested implementation:

var id;
element(by.binding('smsDetails.message')).getText().then(function(message){
    var messageArray = msg.split("\n");
    var indexPosition = messageArray[0].indexOf("ID");
    id = messageArray[0].substr(indexPosition + 5, 10);

    //Operation on text value - id can be performed here

}).then(function(){

    //Additional operation on text value - id can be performed here

});
//Avoid performing operations on text value - id outside of promises

If there is a need to utilize the value outside of the promise (.then()), ensure that you wait for the text to be returned before continuing with your operation:

var id = '';
browser.wait(function(){
    return element(by.binding('smsDetails.message')).getText().then(function(message){
        //Other operations
        id = messageArray[0].substr(indexPosition + 5, 10);
        return !!message;
    });
}).then(function(){
    //Continue with the operation on text value - id
});

I hope this explanation proves helpful in your implementation.

Answer 2

When using the getText() function, be sure to capture the string value it returns. The second method outlined is suitable for this purpose.

However, a potential issue with this approach is that Protractor's return of the string value is asynchronous. Therefore, it is important to wait until the text value is received before proceeding with any necessary operations.

Here is a suggested implementation:

var id;
element(by.binding('smsDetails.message')).getText().then(function(message){
    var messageArray = msg.split("\n");
    var indexPosition = messageArray[0].indexOf("ID");
    id = messageArray[0].substr(indexPosition + 5, 10);

    //Operation on text value - id can be performed here

}).then(function(){

    //Additional operation on text value - id can be performed here

});
//Avoid performing operations on text value - id outside of promises

If there is a need to utilize the value outside of the promise (.then()), ensure that you wait for the text to be returned before continuing with your operation:

var id = '';
browser.wait(function(){
    return element(by.binding('smsDetails.message')).getText().then(function(message){
        //Other operations
        id = messageArray[0].substr(indexPosition + 5, 10);
        return !!message;
    });
}).then(function(){
    //Continue with the operation on text value - id
});

I hope this explanation proves helpful in your implementation.

Is it more efficient to declare a variable or directly return the variable from the Element's getText() promise in Protractor?

Answer №1

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