When using CasperJS to capture multiple screenshots, the most recent screenshot will replace all previous ones

Exploring CasperJS has been a great experience for me. Despite my enjoyment, I've encountered an issue with casper.capture() that has me stumped. I've set it up to capture screenshots whenever a test fails and placed it in a separate setup module as shown below:

function captureFailure(filename){
    casper.test.on("fail", function(failure){
        casper.viewport(1280, 1024);
        casper.capture("failedScreenshots/Failure-"+filename+".jpg", {
            top: 0,
            left: 0,
            width: 1280,
            height: 1024
        });
    });
}

exports.captureFailure = captureFailure;

Then, in my tests, I incorporate it like this:

. . .
// execute setup
setup.login();

// perform test
casper.test.begin("Complete new social campaign flow with image as a signed in user.", 16, function suite(test) {
// initialize captureFailure
    setup.captureFailure("SocialFlowImage");

    casper.start(data.baseURL+'/campaigns/', function(){
        console.log("Campaign page loaded");
        this.click(campaignCreate);
        casper.waitForSelector(socialCampaignCreateModal, function(){
            test.assertExists(socialCampaignCreateModal, 'Modal pops up');
            test.assertTextExists('Deal', 'Deal button exists');
            test.assertTextExists('Marketing Email', 'Marketing Email button exists');
            test.assertTextExists('Facebook', 'Facebook button exists');
        });
    });
. . .

Initially, everything was functioning properly. However, when testing multiple failures simultaneously, the screenshots were being overwritten sequentially. The sequence looked something like this:

test 1 -> test 1 failure -> Capture screenshot 1 -> test 2 -> test 2 failure -> Capture screenshot 2 and subsequently overwrite screenshot 1

This resulted in having duplicate screenshots with different names.

Any suggestions on how to resolve this issue?

Answer №1

Realized I was dealing with overlapping event handlers for the "fail" event. To solve this issue, I adjusted the style of my casperjs test by incorporating the test object with setUp and tearDown functions. I then eliminated the event handlers using the following code:

casper.test.removeListener("fail", casper.test.listeners("fail")[0]);

Although somewhat unconventional, my custom event handler includes a filename argument for unique screenshot names and improved debugging. This led me to find a workaround since my setUp consists of an anonymous function that attaches it.

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