This patch is the same approach as the one that want into 2.2.x. It
covers the functions in 2.3.x that do not exist in 2.2.x.
Without this patch all of the spec tests for parser functions in stdlib
would instantiate their own scope instances. This is a problem because
the standard library is tightly coupled with the internal behavior of
Puppet. Tight coupling like this creates failures when we change the
internal behavior of Puppet. This is exactly what happened recently
when we changed the method signature for the initializer of
Puppet::Parser::Scope instances.
This patch fixes the problem by creating scope instances using the
puppet labs spec helper. The specific method that provides scope
instances in Puppet-version-independent way is something like this:
let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
This patch simply implements this across the board.
This function is used to validate a string is less than a maximum length. The
string, or array of strings, is passed as the first argument to the function.
The maximum length of the string is passed as the second argument.
It is useful to validate, for example, that Puppet is not sending a username
to a downstream system that the system cannot cope with, but that might not
cause an error message - for example, MySQL will not accept a username of
more than 16 characters. This enables a Puppet administrator to validate
the data that it may have been passed from upstream through, for example,
Hiera.
