Use puppet4 functions-api

Depends-On: https://review.openstack.org/#/c/614782/
Change-Id: I7bb50c4e591585b80661fe0d41c7cc2dfec5fdf8

lib/puppet/functions/validate_yum_hash.rb

@@ -0,0 +1,58 @@
+Puppet::Functions.create_function(:validate_yum_hash) do
+  def validate_yum_hash(*args)
+    yumrepo_arguments = [
+      'name',
+      'ensure',
+      'baseurl',
+      'cost',
+      'descr',
+      'enabled',
+      'enablegroups',
+      'exclude',
+      'failovermethod',
+      'gpgcheck',
+      'gpgkey',
+      'http_caching',
+      'include',
+      'includepkgs',
+      'keepalive',
+      'metadata_expire',
+      'metalink',
+      'mirrorlist',
+      'priority',
+      'protect',
+      'provider',
+      'proxy',
+      'proxy_password',
+      'proxy_username',
+      'repo_gpgcheck',
+      's3_enabled',
+      'skip_if_unavailable',
+      'sslcacert',
+      'sslclientcert',
+      'sslclientkey',
+      'sslverify',
+      'target',
+      'timeout'
+    ]
+
+    if args.size > 1
+      raise Puppet::Error, "validate_yum_hash takes only a single argument, #{args.size} provided"
+    end
+    arg = args[0]
+
+    if not arg.kind_of?(Hash)
+      raise Puppet::Error, "non-hash argument provided to validate_yum_hash"
+    end
+
+    if arg.size > 0
+      arg.each do |title, params|
+        params.each do |param, value|
+          if ! yumrepo_arguments.include?(param)
+            raise Puppet::Error, "Parameter #{param} is not valid for the yumrepo type"
+          end
+        end
+      end
+    end
+  end
+end

lib/puppet/parser/functions/validate_yum_hash.rb

@@ -1,59 +0,0 @@
-module Puppet::Parser::Functions
-
-  yumrepo_arguments = [
-    'name',
-    'ensure',
-    'baseurl',
-    'cost',
-    'descr',
-    'enabled',
-    'enablegroups',
-    'exclude',
-    'failovermethod',
-    'gpgcheck',
-    'gpgkey',
-    'http_caching',
-    'include',
-    'includepkgs',
-    'keepalive',
-    'metadata_expire',
-    'metalink',
-    'mirrorlist',
-    'priority',
-    'protect',
-    'provider',
-    'proxy',
-    'proxy_password',
-    'proxy_username',
-    'repo_gpgcheck',
-    's3_enabled',
-    'skip_if_unavailable',
-    'sslcacert',
-    'sslclientcert',
-    'sslclientkey',
-    'sslverify',
-    'target',
-    'timeout'
-  ]
-
-  newfunction(:validate_yum_hash) do |args|
-    if args.size > 1
-      raise Puppet::Error, "validate_yum_hash takes only a single argument, #{args.size} provided"
-    end
-    arg = args[0]
-
-    if not arg.kind_of?(Hash)
-      raise Puppet::Error, "non-hash argument provided to validate_yum_hash"
-    end
-
-    if arg.size > 0
-      arg.each do |title, params|
-        params.each do |param, value|
-          if ! yumrepo_arguments.include?(param)
-            raise Puppet::Error, "Parameter #{param} is not valid for the yumrepo type"
-          end
-        end
-      end
-    end
-  end
-end

spec/functions/validate_yum_hash_spec.rb

@@ -0,0 +1,31 @@
+require 'spec_helper'
+
+describe 'validate_yum_hash' do
+  it 'exists' do
+    is_expected.not_to eq(nil)
+  end
+
+  it 'throws error with more than one argument' do
+    is_expected.to run.with_params({'title' => {'key1' => 'value1'}, 'title2' => {'key2' => 'value2'}}).and_raise_error(Puppet::Error)
+  end
+
+  it 'fails with no arguments' do
+    is_expected.to run.with_params.and_raise_error(Puppet::Error)
+  end
+
+  it 'fails with invalid hash' do
+    is_expected.to run.with_params({'title' => {'invalid' => 'val'}}).and_raise_error(Puppet::Error)
+  end
+
+  it 'fails with invalid hash with multiple entries' do
+    is_expected.to run.with_params({'title' => {'baseurl' => 'placeholder', 'invalid' => 'val'}}).and_raise_error(Puppet::Error)
+  end
+
+  it 'works with valid entry' do
+    is_expected.to run.with_params({'title' => {'baseurl' => 'placeholder'}})
+  end
+
+  it 'works with multiple valid entries' do
+    is_expected.to run.with_params({'title' => {'baseurl' => 'placeholder', 'timeout' => 30}})
+  end
+end