Fix linux-2.6 in download URL for RPMs

Starting with 9.0.5 Splunk changed the filename of the RPM. It no longer includes
"linux-2.6", thus we need to adapt to this change.

manifests/params.pp

@@ -302,6 +302,13 @@
     default:   { $package_provider = undef } # Don't define a $package_provider
   }
 
+  # Download URLs changed starting from 9.0.5 for RPMs.
+  # Splunk no longer includes "-linux-2.6-".
+  $linux_prefix = versioncmp($version, '9.0.5') ? {
+    default  => '.',
+    -1 => '-linux-2.6-',
+  }
+
   # Settings specific to an architecture as well as an OS family
   case "${facts['os']['family']} ${facts['os']['architecture']}" {
     'RedHat i386': {
@@ -310,12 +317,12 @@
       $enterprise_package_name = 'splunk'
     }
     'RedHat x86_64': {
-      $package_suffix          = "${version}-${build}-linux-2.6-x86_64.rpm"
+      $package_suffix          = "${version}-${build}${linux_prefix}x86_64.rpm"
       $forwarder_package_name  = 'splunkforwarder'
       $enterprise_package_name = 'splunk'
     }
     'RedHat ppc64le': {
-      $package_suffix          = "${version}-${build}-linux-2.6-ppc64le.rpm"
+      $package_suffix          = "${version}-${build}${linux_prefix}ppc64le.rpm"
       $forwarder_package_name  = 'splunkforwarder'
       $enterprise_package_name = 'splunk'
     }
@@ -350,7 +357,7 @@
       $enterprise_package_name = 'splunk'
     }
     'Suse x86_64': {
-      $package_suffix          = "${version}-${build}-linux-2.6-x86_64.rpm"
+      $package_suffix          = "${version}-${build}${linux_prefix}x86_64.rpm"
       $forwarder_package_name  = 'splunkforwarder'
       $enterprise_package_name = 'splunk'
     }

spec/classes/enterprise_spec.rb

@@ -39,7 +39,55 @@
 end
 
 describe 'splunk::enterprise' do
-  context 'supported operating systems' do
+  context 'correct download URL' do
+    test_on = {
+      hardwaremodels: ['x86_64'],
+      supported_os: [
+        {
+          'operatingsystem'        => 'RedHat',
+          'operatingsystemrelease' => ['9'],
+        },
+      ],
+    }
+    on_supported_os(test_on).each do |os, facts|
+      context "on #{os}" do
+        let(:facts) { facts }
+
+        context 'when version is lower than 9.0.5' do
+          let(:pre_condition) do
+            "class { 'splunk::params': version => '9.0.0', build => 'build' }"
+          end
+
+          it {
+            is_expected.to compile.with_all_deps
+            is_expected.to contain_class('splunk::enterprise').with(enterprise_package_src: 'https://download.splunk.com/products/splunk/releases/9.0.0/linux/splunk-9.0.0-build-linux-2.6-x86_64.rpm')
+          }
+        end
+
+        context 'when version is 9.0.5' do
+          let(:pre_condition) do
+            "class { 'splunk::params': version => '9.0.5', build => 'build' }"
+          end
+
+          it {
+            is_expected.to compile.with_all_deps
+            is_expected.to contain_class('splunk::enterprise').with(enterprise_package_src: 'https://download.splunk.com/products/splunk/releases/9.0.5/linux/splunk-9.0.5-build.x86_64.rpm')
+          }
+        end
+
+        context 'when version is higher than 9.0.5' do
+          let(:pre_condition) do
+            "class { 'splunk::params': version => '9.1.0', build => 'build' }"
+          end
+
+          it {
+            is_expected.to compile.with_all_deps
+            is_expected.to contain_class('splunk::enterprise').with(enterprise_package_src: 'https://download.splunk.com/products/splunk/releases/9.1.0/linux/splunk-9.1.0-build.x86_64.rpm')
+          }
+        end
+      end
+    end
+
     on_supported_os.each do |os, facts|
       next if facts[:os]['name'] == 'windows' # Splunk Server not used supported on windows