I have this problem all the time and it is pretty anoying. The problem is
in parsing the return value. The javascript is returning null but the
executeJS is returning `()`. The aeson instance for `()` does not parse
null. What I do is something like
someOper :: WD ()
ret <- executeJS [...] "...]
maybe (return ()) return ret -- parse value from executeJS as Maybe ()
On Fri, Dec 11, 2015 at 11:48 AM, Denis Shevchenko
Hi there!
I use `webdriver` package for test automation with PhantomJS. And I need to click some button, but not with a `click` function, but with a native JS. I see a special function for such a task, `executeJS`, in the module `Test.WebDriver.Commands`. So this is my code:
... button <- findElement . ById $ "clearCart" info <- elemInfo button executeJS [JSArg info] "arguments[0].click();" ...
But I got a runtime error:
BadJSON "when expecting a (), encountered Null instead"
How can I fix it?
- Denis
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