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, 34 insertions, 56 deletions

diff --git a/spec/functions/validate_ipv4_address_spec.rb b/spec/functions/validate_ipv4_address_spec.rb
index 27ea4fe..b6170d4 100755
--- a/spec/functions/validate_ipv4_address_spec.rb
+++ b/spec/functions/validate_ipv4_address_spec.rb
@@ -1,62 +1,40 @@
-#! /usr/bin/env ruby -S rspec
-
-require "spec_helper"
-
-describe Puppet::Parser::Functions.function(:validate_ipv4_address) do
-  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
-
-  describe "when calling validate_ipv4_address from puppet" do
-    describe "when given IPv4 address strings" do
-      it "should compile with one argument" do
-        Puppet[:code] = "validate_ipv4_address('1.2.3.4')"
-        scope.compiler.compile
-      end
-
-      it "should compile with multiple arguments" do
-        Puppet[:code] = "validate_ipv4_address('1.2.3.4', '5.6.7.8')"
-        scope.compiler.compile
-      end
-    end
-
-    describe "when given an IPv6 address" do
-      it "should not compile" do
-        Puppet[:code] = "validate_ipv4_address('3ffe:505')"
-        expect {
-          scope.compiler.compile
-        }.to raise_error(Puppet::ParseError, /not a valid IPv4 address/)
-      end
-    end
-
-    describe "when given other strings" do
-      it "should not compile" do
-        Puppet[:code] = "validate_ipv4_address('hello', 'world')"
-        expect {
-          scope.compiler.compile
-        }.to raise_error(Puppet::ParseError, /not a valid IPv4 address/)
-      end
-    end
-
-    describe "when given numbers" do
-      it "should not compile" do
-        Puppet[:code] = "validate_ipv4_address(1, 2)"
-        expect { scope.compiler.compile }.to raise_error
-      end
-    end
-
-    describe "when given booleans" do
-      it "should not compile" do
-        Puppet[:code] = "validate_ipv4_address(true, false)"
-        expect {
-          scope.compiler.compile
-        }.to raise_error(Puppet::ParseError, /is not a string/)
+require 'spec_helper'
+
+describe 'validate_ipv4_address' do
+  describe 'signature validation' 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) }
+
+    describe 'valid inputs' do
+      it { is_expected.to run.with_params('0.0.0.0') }
+      it { is_expected.to run.with_params('8.8.8.8') }
+      it { is_expected.to run.with_params('127.0.0.1') }
+      it { is_expected.to run.with_params('10.10.10.10') }
+      it { is_expected.to run.with_params('194.232.104.150') }
+      it { is_expected.to run.with_params('244.24.24.24') }
+      it { is_expected.to run.with_params('255.255.255.255') }
+      it { is_expected.to run.with_params('1.2.3.4', '5.6.7.8') }
+      context 'with netmasks' do
+        it { is_expected.to run.with_params('8.8.8.8/0') }
+        it { is_expected.to run.with_params('8.8.8.8/16') }
+        it { is_expected.to run.with_params('8.8.8.8/32') }
+        it { is_expected.to run.with_params('8.8.8.8/255.255.0.0') }
       end
     end
 
-    it "should not compile when no arguments are passed" do
-      Puppet[:code] = "validate_ipv4_address()"
-      expect {
-        scope.compiler.compile
-      }.to raise_error(Puppet::ParseError, /wrong number of arguments/)
+    describe 'invalid inputs' do
+      it { is_expected.to run.with_params({}).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params(1).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params(true).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params('one').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
+      it { is_expected.to run.with_params('0.0.0').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
+      it { is_expected.to run.with_params('0.0.0.256').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
+      it { is_expected.to run.with_params('0.0.0.0.0').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
+      it { is_expected.to run.with_params('affe::beef').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
+      it { is_expected.to run.with_params('1.2.3.4', {}).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params('1.2.3.4', 1).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params('1.2.3.4', true).and_raise_error(Puppet::ParseError, /is not a string/) }
+      it { is_expected.to run.with_params('1.2.3.4', 'one').and_raise_error(Puppet::ParseError, /is not a valid IPv4/) }
     end
   end
 end