Add ClusterPresenter. Fix Static Analysys.

app/controllers/projects/clusters_controller.rb

@@ -81,7 +81,7 @@ class Projects::ClustersController < Projects::ApplicationController
   private
 
   def cluster
-    @cluster ||= project.cluster
+    @cluster ||= project.cluster.present(current_user: current_user)
   end
 
   def create_params

app/models/gcp/cluster.rb

 module Gcp
   class Cluster < ActiveRecord::Base
     extend Gitlab::Gcp::Model
+    include Presentable
 
     belongs_to :project, inverse_of: :cluster
     belongs_to :user

app/presenters/gcp/cluster_presenter.rb

+module Gcp
+  class ClusterPresenter < Gitlab::View::Presenter::Delegated
+    presents :cluster
+
+    def gke_cluster_url
+      "https://console.cloud.google.com/kubernetes/clusters/details/#{gcp_cluster_zone}/#{gcp_cluster_name}"
+    end
+  end
+end

app/views/projects/clusters/show.html.haml

@@ -37,7 +37,7 @@
       %label
         = s_('ClusterIntegration|Google container engine')
       %p
-        - link_gke = link_to(s_('ClusterIntegration|Google Container Engine'), '', target: '_blank', rel: 'noopener noreferrer')
+        - link_gke = link_to(s_('ClusterIntegration|Google Container Engine'), @cluster.gke_cluster_url, target: '_blank', rel: 'noopener noreferrer')
         = s_('ClusterIntegration|Manage your cluster by visiting %{link_gke}').html_safe % { link_gke: link_gke }
 
       .hidden.js-cluster-error.alert.alert-danger{ role: 'alert' }

spec/controllers/projects/clusters_controller_spec.rb

@@ -100,8 +100,7 @@ describe Projects::ClustersController do
 
   describe 'POST create' do
     subject do
-      post :create, params.merge(
-                      namespace_id: project.namespace,
+      post :create, params.merge(namespace_id: project.namespace,
                                  project_id: project)
     end
 
@@ -121,7 +120,7 @@ describe Projects::ClustersController do
           {
             cluster: {
               gcp_cluster_name: 'new-cluster',
-              gcp_project_id: '111',
+              gcp_project_id: '111'
             }
           }
         end
@@ -221,8 +220,7 @@ describe Projects::ClustersController do
     let(:params) { {} }
 
     subject do
-      put :update, params.merge(
-                     namespace_id: project.namespace,
+      put :update, params.merge(namespace_id: project.namespace,
                                 project_id: project,
                                 id: cluster)
     end

spec/presenters/gcp/cluster_presenter_spec.rb

+require 'spec_helper'
+
+describe Gcp::ClusterPresenter do
+  let(:project) { create(:project) }
+  let(:cluster) { create(:gcp_cluster, project: project) }
+
+  subject(:presenter) do
+    described_class.new(cluster)
+  end
+
+  it 'inherits from Gitlab::View::Presenter::Delegated' do
+    expect(described_class.superclass).to eq(Gitlab::View::Presenter::Delegated)
+  end
+
+  describe '#initialize' do
+    it 'takes a cluster and optional params' do
+      expect { presenter }.not_to raise_error
+    end
+
+    it 'exposes cluster' do
+      expect(presenter.cluster).to eq(cluster)
+    end
+
+    it 'forwards missing methods to cluster' do
+      expect(presenter.gcp_cluster_zone).to eq(cluster.gcp_cluster_zone)
+    end
+  end
+
+  describe '#gke_cluster_url' do
+    subject { described_class.new(cluster).gke_cluster_url }
+
+    it { is_expected.to include(cluster.gcp_cluster_zone) }
+    it { is_expected.to include(cluster.gcp_cluster_name) }
+  end
+end