Fix deployment_platform assignation when multiple clusters & environments

Closes #5347

ee/app/models/concerns/ee/deployment_platform.rb

@@ -6,7 +6,7 @@ module EE
     def deployment_platform(environment: nil)
       return super unless environment && feature_available?(:multiple_clusters)
 
-      @deployment_platform ||= # rubocop:disable Gitlab/ModuleWithInstanceVariables
+      @deployment_platform = # rubocop:disable Gitlab/ModuleWithInstanceVariables
         clusters.enabled.on_environment(environment.name)
           .last&.platform_kubernetes
 

ee/changelogs/unreleased/5347-fix-multiple-clusters-incorrect-details-injected.yml

+---
+title: Fixes incorrect assignation of cluster details
+merge_request: 5047
+author:
+type: fixed

ee/spec/models/concerns/ee/deployment_platform_spec.rb

@@ -4,15 +4,8 @@ describe EE::DeploymentPlatform do
   describe '#deployment_platform' do
     let(:project) { create(:project) }
 
-    context 'when environment is specified' do
-      let(:environment) { create(:environment, project: project, name: 'review/name') }
-      let!(:default_cluster) { create(:cluster, :provided_by_user, projects: [project], environment_scope: '*') }
-      let!(:cluster) { create(:cluster, :provided_by_user, environment_scope: 'review/*', projects: [project]) }
-
-      subject { project.deployment_platform(environment: environment) }
-
     shared_examples 'matching environment scope' do
-        context 'when multiple clusters is available' do
+      context 'when multiple clusters license is available' do
         before do
           stub_licensed_features(multiple_clusters: true)
         end
@@ -22,7 +15,7 @@ describe EE::DeploymentPlatform do
         end
       end
 
-        context 'when multiple clusters is unavailable' do
+      context 'when multiple clusters licence is unavailable' do
         before do
           stub_licensed_features(multiple_clusters: false)
         end
@@ -34,7 +27,7 @@ describe EE::DeploymentPlatform do
     end
 
     shared_examples 'not matching environment scope' do
-        context 'when multiple clusters is available' do
+      context 'when multiple clusters license is available' do
         before do
           stub_licensed_features(multiple_clusters: true)
         end
@@ -44,7 +37,7 @@ describe EE::DeploymentPlatform do
         end
       end
 
-        context 'when multiple clusters is unavailable' do
+      context 'when multiple clusters license is unavailable' do
         before do
           stub_licensed_features(multiple_clusters: false)
         end
@@ -55,6 +48,13 @@ describe EE::DeploymentPlatform do
       end
     end
 
+    context 'when environment is specified' do
+      let!(:default_cluster) { create(:cluster, :provided_by_user, projects: [project], environment_scope: '*') }
+      let!(:cluster) { create(:cluster, :provided_by_user, environment_scope: 'review/*', projects: [project]) }
+      let(:environment) { create(:environment, project: project, name: 'review/name') }
+
+      subject { project.deployment_platform(environment: environment) }
+
       context 'when environment scope is exactly matched' do
         before do
           cluster.update!(environment_scope: 'review/name')
@@ -133,5 +133,21 @@ describe EE::DeploymentPlatform do
         end
       end
     end
+
+    context 'with multiple clusters and multiple environments' do
+      let!(:cluster_1) { create(:cluster, :provided_by_user, projects: [project], environment_scope: 'staging/*') }
+      let!(:cluster_2) { create(:cluster, :provided_by_user, projects: [project], environment_scope: 'test/*') }
+      let(:environment_1) { create(:environment, project: project, name: 'staging/name') }
+      let(:environment_2) { create(:environment, project: project, name: 'test/name') }
+
+      before do
+        stub_licensed_features(multiple_clusters: true)
+      end
+
+      it 'should return the appropriate cluster' do
+        expect(project.deployment_platform(environment: environment_1)).to eq(cluster_1.platform_kubernetes)
+        expect(project.deployment_platform(environment: environment_2)).to eq(cluster_2.platform_kubernetes)
+      end
+    end
   end
 end