ruby execute_script for custom function leads to no results

Question

I have custom JS function about some of page performance details Doing automation via ruby-rspec-capybara Having next code:

    visit page
    execute_async_script("function getPagePerformance(){if (window.performance && window.performance.timing) {
    let timing = window.performance.timing;
    let timing_obj = {};
    /*timing*/
    timing_obj.pageLoadingTime = timing.loadEventEnd - timing.navigationStart;
    timing_obj.dnsHandshake = timing.domainLookupEnd - timing.domainLookupStart;
    timing_obj.tcpConnect = timing.connectEnd - timing.connectStart;
    timing_obj.timeToReachServer = timing.responseStart - timing.requestStart;
    timing_obj.serverResponseTime = timing.responseEnd - timing.responseStart;
    timing_obj.totalNetworkLatency = timing.responseEnd - timing.fetchStart;
    timing_obj.domInteractive = performance.timing.domInteractive - performance.timing.navigationStart;return timing_obj;}}
getPagePerformance()")

I've tried it with all methods that ruby actually has:

execute_async_script
execute_script
evaluate_script

And there is no results in console But they are if im doing it manually In additional i've tried to set alerts or console.log inside function just to check if all lines are executed at all - all alerts are being displayed during test running

I've added waiting to make sure that page is loaded (just to exclude questions about this case)

my question is about why this function doesn't return values when test is run

what happens when you do `evaluate_script`? Any errors anywhere? — Sergio Tulentsev, Sep 11 '17 at 12:39
check if the standard output and standard error are redirected — Snake Sanders, Sep 11 '17 at 12:39
"And there is no results in console" - I'm not seeing any code that writes to console. — Sergio Tulentsev, Sep 11 '17 at 12:40
Actually there was nothing in console, no errors - nothing. Answer below helped — z4elovek, Sep 14 '17 at 10:08

score 0 · Answer 1 · answered Sep 12 '17 at 17:28

The call doesn't return anything because your script doesn't return anything.

Here's an example:

timing = execute_script(%{
  var t = window.performance.timing;
  return {
    pageLoadingTime: t.loadEventEnd - t.navigationStart,
    dnsHandshake: t.domainLookupEnd - t.domainLookupStart,
    tcpConnect: t.connectEnd - t.connectStart,
    timeToReachServer: t.responseStart - t.requestStart,
    serverResponseTime: t.responseEnd - t.responseStart,
    totalNetworkLatency: t.responseEnd - t.fetchStart,
    domInteractive: t.domInteractive - t.navigationStart
  };
})

Yep, thanks a lot. it helped and it works if use without wrapping in function: 'if (window.performance && window.performance.timing) { let timing = window.performance.timing; let timing_obj = {}; ... return timing_obj; }' — z4elovek, Sep 14 '17 at 10:42

ruby execute_script for custom function leads to no results

1 Answers1