OpenEuphoria

2. Re: Exception handling

• Posted by katsmeow Jan 31, 2023
• 993 views

I think there is a law to the effect that no language or computer motherboard can have all the good stuff in/on it.

Kat

4. Re: Exception handling

• Posted by petelomax Feb 01, 2023
• 885 views

Of course Phix has already got try/catch.

6. Re: Exception handling

• Posted by katsmeow Feb 01, 2023
• 813 views

This is one reason i added task.e features into http.e. And why i wrote a layer over memshare.ew to make transparent global shared vars. Between the two of them, your program(s) can be aware of what various parts of itself are (not) doing.

Kat

8. Re: Exception handling

• Posted by ghaberek (admin) Feb 03, 2023
• 576 views

function isHeDead(driver) { 
  try { 
    var url = driver.Url; 
    return false; 
  catch (E) { 
    return true; 
  } 
} 

In your example, you're fetching the URL property of the driver in order to determine the connection status, correct? If I were writing a Selenium library for Euphoria, I would do the same thing:

function isHeDead( atom driver ) 
 
    -- Selenium_GetUrl() would return a sequence (the URL) 
    -- or an atom (an error code, like ERR_TIMEDOUT). 
 
    object url = Selenium_GetUrl( driver ) 
 
    if atom( url ) then 
        -- we received ERR_TIMEDOUT 
        return FALSE 
    end if 
 
    -- we received "https://..." 
    return TRUE 
end function 

Now I'm not saying try/catch isn't a good thing, but in this example I don't see how the two methods are any different.

You could also try the Go approach, which also doesn't have exceptions and instead returns a value and error code from every function:

function isHeDead( atom driver ) 
 
    -- Selenium_GetUrl() would always return a sequence containing two items: 
    -- [1] a sequence: the URL (on success) or an empty sequence (on error) 
    -- [2] an atom: the error code (on error) or zero (on success) 
 
    atom err 
    sequence url 
 
    {url,err} = Selenium_GetUrl( driver ) 
 
    if err then 
        -- we received {"",ERR_TIMEDOUT} 
        return FALSE 
    end if 
 
    -- we received {"https://...",ERR_OK} 
    return TRUE 
end function 

This approach is more strictly enforced in Go than it would be in Euphoria, but it provides good error handling without exceptions. The multiple assignment feature was added in Euphoria 4.1.

What are you talking about, Bruce? It's your baby! You'll need to raise maintain it yourself.

-Greg

10. Re: Exception handling

• Posted by axtens_bruce Feb 03, 2023
• 523 views

Thus why I keep poking my nose in to see how 8th and COBOL are getting on.

But thanks for all your examples. Finding out how to detect that Selenium has somehow died in the background without the test crashing the program would be great as there are a large number of instances in the program where Selenium is used.

-Bruce