Dependencies order question

Hi all,

After a bit of googling, I have a question regarding dependencies
solving by yum: Are dependencies always installed in the order they
are defined in the RPM .spec file ?

For instance, I have a package with:
Requires: foo, bar
or
Requires: foo
Requires: bar

Is it guaranteed that 'foo' will always be installed before 'bar' ?
(Assuming that 'bar' is not itself a dependency of 'foo' or that my
current package is not itself a dependency of another package that
would requires 'bar' at first).

Thanks,
Manuel