Add test unit tests.

[brucellino]

There are no unit tests. We have no idea if this package is working, nor whether it does the same thing it should if we eventually refactor.

[brucellino]

Now that we have closed #14 I think we can consider a few tests in the pipeline. We probably need to do this off of the correct state of machine... Ie, an image with the rest of the software necessary already installed.

[gwarf]

Following tests could quite easily be implemented for centos 6 and 7:

• When the CA are not installed and cafile and capath not set it should work (ie. cert validation is disabled)
• When cafile or capath are set the IGTF CA (see EGI_IGTF_Release) should be installed to validate the cert (on CentOS 7 it will fail without the CA and success with them, and CentOS 6 doesn't care about the CA)

The following seems to be sufficient to test:

mkdir -p /var/cache/glite/glite-info-update-endpoints
# Potentially edit conf in etc/glite-info-update-endpoints.conf
./bin/glite-info-update-endpoints  -c etc/glite-info-update-endpoints.conf

On success /var/cache/glite/top-urls.conf will be populated with some URLs.