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