Work around inconsistent loader behaviour between versions

Author: rodjek

lib/rspec-puppet/example/function_example_group.rb

@@ -94,7 +94,8 @@ def find_function(function_name = self.class.top_level_description)
               File.join(File.dirname(r), 'lib')
             }
             dir = env_libdirs.find { |r| File.directory?(r) }
-            loader = Puppet::Pops::Loader::ModuleLoaders::FileBased.new(loaders.private_environment_loader, loaders, Puppet::Pops::Loader::ENVIRONMENT, dir, 'environment functions', [:func_4x])
+            loader_dir = loader_needs_lib? ? dir : File.dirname(dir)
+            loader = Puppet::Pops::Loader::ModuleLoaders::FileBased.new(loaders.private_environment_loader, loaders, Puppet::Pops::Loader::ENVIRONMENT, loader_dir, 'environment functions', [:func_4x])
             func = V4FunctionWrapper.new(function_name, loader.load(:function, function_name), context_overrides)
             @scope = context_overrides[:global_scope]
           end
@@ -138,6 +139,10 @@ def rspec_puppet_cleanup
 
     private
 
+    def loader_needs_lib?
+      !Puppet::Pops::Loader::LoaderPaths::FunctionPath4x::FUNCTION_PATH_4X.start_with?('lib')
+    end
+
     def compiler
       @compiler ||= build_compiler
     end