How to get wget to fail to fetch a password-protected URL after a previous success?

[Omer Zak]

I am writing regression tests to test that a website continues to
behave the same after moving to another host.

Among other things, I want to test that a password-protected area in
the website continues to work as expected, protecting its contents.

I am trying to test as follows.

wget ...other options... URL
            # no passwords - expected to fail
wget --user=wrong --password=wrong ...other options... URL
            # expected to fail
wget --user=correct --password=correct ...other options... URL
            # expected to succeed

However after 1st time the correct user+password are presented,
subsequent wget's to the same URL do not fail.

I Googled but found nothing useful.
My version of wget is: GNU Wget 1.21 built on linux-gnu.
(there is more information, will be provided if relevant)

At the suggestion of:
https://stackoverflow.com/questions/35076334/dd-wrt-wget-returns-a-cached-file
I tried:
wget -p --no-http-keep-alive --no-cache --no-cookies \
        --user=whatever --password=whatever
        --no-host-directories URL
Even this did not fail.

There is no obvious place in the filesystem where wget might cache its
credentials.

How can I get wget to fail to fetch a password-protected web resource
(HTTP 403 Forbidden) after it succeeded in fetching the same resource
previously?

Thanks,
--- Omer Zak


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