Refactor .available spec into a shared_example

- Uses shared_exampels to DRY up duplicated specs

spec/models/clusters/applications/cert_manager_spec.rb

@@ -8,19 +8,6 @@
   include_examples 'cluster application version specs', :clusters_applications_cert_managers
   include_examples 'cluster application initial status specs'
 
-  describe '.available' do
-    subject { described_class.available }
-
-    let!(:installed_cluster) { create(:clusters_applications_cert_managers, :installed) }
-    let!(:updated_cluster) { create(:clusters_applications_cert_managers, :updated) }
-
-    before do
-      create(:clusters_applications_cert_managers, :errored)
-    end
-
-    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
-  end
-
   describe '#install_command' do
     let(:cluster_issuer_file) { { "cluster_issuer.yaml": "---\napiVersion: certmanager.k8s.io/v1alpha1\nkind: ClusterIssuer\nmetadata:\n  name: letsencrypt-prod\nspec:\n  acme:\n    server: https://acme-v02.api.letsencrypt.org/directory\n    email: admin@example.com\n    privateKeySecretRef:\n      name: letsencrypt-prod\n    http01: {}\n" } }
     subject { cert_manager.install_command }

spec/models/clusters/applications/ingress_spec.rb

@@ -16,19 +16,6 @@
     allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
   end
 
-  describe '.available' do
-    subject { described_class.available }
-
-    let!(:installed_cluster) { create(:clusters_applications_ingress, :installed) }
-    let!(:updated_cluster) { create(:clusters_applications_ingress, :updated) }
-
-    before do
-      create(:clusters_applications_ingress, :errored)
-    end
-
-    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
-  end
-
   describe '#make_installed!' do
     before do
       application.make_installed!

spec/models/clusters/applications/knative_spec.rb

@@ -24,19 +24,6 @@
     it { expect(knative_no_rbac).to be_not_installable }
   end
 
-  describe '.installed' do
-    subject { described_class.available }
-
-    let!(:installed_cluster) { create(:clusters_applications_knative, :installed) }
-    let!(:updated_cluster) { create(:clusters_applications_knative, :updated) }
-
-    before do
-      create(:clusters_applications_knative, :errored)
-    end
-
-    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
-  end
-
   describe 'make_installed with external_ip' do
     before do
       application.make_installed!

spec/models/clusters/applications/prometheus_spec.rb

@@ -9,19 +9,6 @@
   include_examples 'cluster application helm specs', :clusters_applications_prometheus
   include_examples 'cluster application initial status specs'
 
-  describe '.available' do
-    subject { described_class.available }
-
-    let!(:installed_cluster) { create(:clusters_applications_prometheus, :installed) }
-    let!(:updated_cluster) { create(:clusters_applications_prometheus, :updated) }
-
-    before do
-      create(:clusters_applications_prometheus, :errored)
-    end
-
-    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
-  end
-
   describe 'transition to installed' do
     let(:project) { create(:project) }
     let(:cluster) { create(:cluster, :with_installed_helm, projects: [project]) }

spec/models/clusters/applications/runner_spec.rb

@@ -11,19 +11,6 @@
 
   it { is_expected.to belong_to(:runner) }
 
-  describe '.available' do
-    subject { described_class.available }
-
-    let!(:installed_cluster) { create(:clusters_applications_runner, :installed) }
-    let!(:updated_cluster) { create(:clusters_applications_runner, :updated) }
-
-    before do
-      create(:clusters_applications_runner, :errored)
-    end
-
-    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
-  end
-
   describe '#install_command' do
     let(:kubeclient) { double('kubernetes client') }
     let(:gitlab_runner) { create(:clusters_applications_runner, runner: ci_runner) }

spec/support/shared_examples/models/cluster_application_status_shared_examples.rb

@@ -9,6 +9,19 @@
     end
   end
 
+  describe '.available' do
+    subject { described_class.available }
+
+    let!(:installed_cluster) { create(application_name, :installed) }
+    let!(:updated_cluster) { create(application_name, :updated) }
+
+    before do
+      create(application_name, :errored)
+    end
+
+    it { is_expected.to contain_exactly(installed_cluster, updated_cluster) }
+  end
+
   describe 'status state machine' do
     describe '#make_installing' do
       subject { create(application_name, :scheduled) }