Convert tests to use plain rspec-puppet

Tests in the new style produces the following documentation output:

abs
  should not eq nil
  should run abs() and raise an Puppet::ParseError
  should run abs(-34) and return 34
  should run abs("-34") and return 34
  should run abs(34) and return 34
  should run abs("34") and return 34

1 files changed, 19 insertions, 28 deletions

diff --git a/spec/functions/getvar_spec.rb b/spec/functions/getvar_spec.rb
index 87ab9b5..37125d1 100755
--- a/spec/functions/getvar_spec.rb
+++ b/spec/functions/getvar_spec.rb
@@ -1,37 +1,28 @@
-#! /usr/bin/env ruby -S rspec
 require 'spec_helper'
 
-describe Puppet::Parser::Functions.function(:getvar) do
-  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
-  describe 'when calling getvar from puppet' do
+describe 'getvar' do
+  it { is_expected.not_to eq(nil) }
+  it { is_expected.to run.with_params().and_raise_error(Puppet::ParseError, /wrong number of arguments/i) }
+  it { is_expected.to run.with_params('one', 'two').and_raise_error(Puppet::ParseError, /wrong number of arguments/i) }
+  it { is_expected.to run.with_params().and_raise_error(Puppet::ParseError, /wrong number of arguments/i) }
 
-    it "should not compile when no arguments are passed" do
-      skip("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
-      Puppet[:code] = '$foo = getvar()'
-      expect {
-        scope.compiler.compile
-      }.to raise_error(Puppet::ParseError, /wrong number of arguments/)
-    end
+  context 'given variables in namespaces' do
+    let(:pre_condition) {
+      <<-'ENDofPUPPETcode'
+      class site::data { $foo = 'baz' }
+      include site::data
+      ENDofPUPPETcode
+    }
 
-    it "should not compile when too many arguments are passed" do
-      skip("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
-      Puppet[:code] = '$foo = getvar("foo::bar", "baz")'
-      expect {
-        scope.compiler.compile
-      }.to raise_error(Puppet::ParseError, /wrong number of arguments/)
+    it { is_expected.to run.with_params('site::data::foo').and_return('baz') }
+    it { is_expected.to run.with_params('::site::data::foo').and_return('baz') }
+
+    context 'with strict variable checking', :if => RSpec.configuration.strict_variables do
+      it { is_expected.to run.with_params('::site::data::bar').and_raise_error(ArgumentError, /undefined_variable/) }
     end
 
-    it "should lookup variables in other namespaces" do
-      skip("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
-      Puppet[:code] = <<-'ENDofPUPPETcode'
-        class site::data { $foo = 'baz' }
-        include site::data
-        $foo = getvar("site::data::foo")
-        if $foo != 'baz' {
-          fail('getvar did not return what we expect')
-        }
-      ENDofPUPPETcode
-      scope.compiler.compile
+    context 'without strict variable checking', :unless => RSpec.configuration.strict_variables do
+      it { is_expected.to run.with_params('::site::data::bar').and_return(nil) }
     end
   end
 end