--- /dev/null
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the join function" do
+ let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+ it "should exist" do
+ expect(Puppet::Parser::Functions.function("join")).to eq("function_join")
+ end
+
+ it "should raise a ParseError if there is less than 1 arguments" do
+ expect { scope.function_join([]) }.to( raise_error(Puppet::ParseError))
+ end
+
+ it "should join an array into a string" do
+ result = scope.function_join([["a","b","c"], ":"])
+ expect(result).to(eq("a:b:c"))
+ end
+end