--- /dev/null
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper_acceptance'
+
+if get_puppet_version =~ /^4/
+ describe 'is_a function' do
+ it 'should match a string' do
+ pp = <<-EOS
+ if 'hello world'.is_a(String) {
+ notify { 'output correct': }
+ }
+ EOS
+
+ apply_manifest(pp, :catch_failures => true) do |r|
+ expect(r.stdout).to match(/Notice: output correct/)
+ end
+ end
+
+ it 'should not match a integer as string' do
+ pp = <<-EOS
+ if 5.is_a(String) {
+ notify { 'output wrong': }
+ }
+ EOS
+
+ apply_manifest(pp, :catch_failures => true) do |r|
+ expect(r.stdout).not_to match(/Notice: output wrong/)
+ end
+ end
+ end
+end