Add gem_install_options test

Also changed .fixtures.yml to use https not git protocol.
This helps people behind firewalls run the tests.

.fixtures.yml

@@ -2,5 +2,5 @@ fixtures:
   symlinks:
     "hiera": "#{source_dir}"
   repositories:
-    "stdlib": "git://github.com/puppetlabs/puppetlabs-stdlib.git"
-    "inifile": "git://github.com/puppetlabs/puppetlabs-inifile.git"
+    "stdlib": "https://github.com/puppetlabs/puppetlabs-stdlib.git"
+    "inifile": "https://github.com/puppetlabs/puppetlabs-inifile.git"

spec/defines/install_spec.rb

@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+describe 'hiera::install' do
+  let :pre_condition do
+    [
+      'include ::hiera'
+    ]
+  end
+  describe 'installing hiera-eyaml' do
+    let :title do
+      'hiera-eyaml'
+    end
+    let(:params) { {
+      'gem_name' => 'hiera-eyaml',
+      'provider' => 'puppetserver_gem'
+    } }
+    it { is_expected.to contain_package('hiera-eyaml').with(
+      'name' => 'hiera-eyaml'
+    )}
+    it { is_expected.to contain_package('hiera-eyaml').without_install_options }
+
+    context 'with gem_install_options' do
+      let :pre_condition do
+        [
+          'class { "hiera": gem_install_options => ["--http_proxy","http://proxy.example.com:3128"]}'
+        ]
+      end
+      it { is_expected.to contain_package('hiera-eyaml').with(
+        'name'            => 'hiera-eyaml',
+        'install_options' => ['--http_proxy', 'http://proxy.example.com:3128'],
+      )}
+    end
+  end
+end