(#16498) Added unit test for loadyaml function.

spec/unit/puppet/parser/functions/loadyaml_spec.rb

@@ -0,0 +1,25 @@
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the loadyaml function" do
+  include PuppetlabsSpec::Files
+
+  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+  it "should exist" do
+    Puppet::Parser::Functions.function("loadyaml").should == "function_loadyaml"
+  end
+
+  it "should raise a ParseError if there is less than 1 arguments" do
+    expect { scope.function_loadyaml([]) }.to raise_error(Puppet::ParseError)
+  end
+
+  it "should convert YAML file to a data structure" do
+    yaml_file = tmpfilename ('yamlfile')
+    File.open(yaml_file, 'w') do |fh|
+      fh.write("---\n aaa: 1\n bbb: 2\n ccc: 3\n ddd: 4\n")
+    end
+    result = scope.function_loadyaml([yaml_file])
+    result.should == {"aaa" => 1, "bbb" => 2, "ccc" => 3, "ddd" => 4 }
+  end
+end