Bug 20750: Add unit tests

Bug 20750: Add unit tests

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Bug 20750: (follow-up) Remove status_alias test

This test is now redundant.

We can't test the return of $req->status_alias against the value of
$req->{status_alias} any more since we've overloaded the status_alias
method and it won't always return the value of the object's property.

We test the functionality of the status_alias method elsewhere so we're
still covered.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>