getValue returns undefined

[a10kiloham]

Hm. Not sure if this is my error or a bug.

Using getValue returns undefined for a valid element.

  // <div class="graph-metric-current">Test</div>
    var alpha = await browser.getValue('.graph-metric-current')
    console.log(alpha)

The returned should be a HTML value of the .graph-metric-current node shouldn't it? Using util.inspect also returns undefined, so I'm not quite sure what the object is meant to be.

Cheers

[a10kiloham]

I'm trying this with evaluate now which I suspect may be a better solution but getting a syntax error:

var test = await browser.evaluate({
    'expression': 'window.location.toString()'
});

returns a syntax error. Looking at the remote interface that seems to be valid syntax? And how do I enable the debug logging?
Cheers

[a10kiloham]

Ah, seems that requires a function input. Not sure how to extract data better, but creating a evaluateElement function removing the .apply gives the desired result. Would it make sense to add a function to evaluate simple non-function expressions? This would allow for extracting page elements more easily.

[LucianoGanga]

Hi @bobbysteel !

Regarding the first comment, I didn't code the .getValue() method thinking on how to get the text between HTML tags; it was made to get HTML Form elements values. I think that for that case, it's better to get it using .evaluate(), which refers also to your second message:

The correct way to use the .evaluate method is this:

const location = await browser.evaluate(function(selector) {
    const selectorHtml = document.querySelector(selector) 
    return selectorHtml.innerText
}, '.graph-metric-current');

About the debugging, you just need to start the app setting an environment variable called DEBUG, to the value "HeadlessChrome:[file]', like this:

DEBUG='HeadlessChrome:actions' npm start

or:

DEBUG='HeadlessChrome:browser' npm start

or, if you want all the logs:

DEBUG='HeadlessChrome:*' npm start

I hope it helps!
Luciano

[a10kiloham]

Thanks Luciano. I'm almost there, but in your sample it throws ReferenceError: selector is not defined. I'm probably being really dumb here but what am I missing?

[LucianoGanga]

My example was wrong! haha, sorry!
I just corrected it, can you check it? Tell me if it doesn't work :)

[a10kiloham]

MAGIC! Thanks!!!