1 files changed, 70 insertions, 0 deletions
diff --git a/spec/support/shared_examples/models/cluster_application_core_shared_examples.rb b/spec/support/shared_examples/models/cluster_application_core_shared_examples.rb
new file mode 100644
index 00000000000..87d12a784ba
--- /dev/null
+++ b/spec/support/shared_examples/models/cluster_application_core_shared_examples.rb
@@ -0,0 +1,70 @@
+shared_examples 'cluster application core specs' do |application_name|
+  it { is_expected.to belong_to(:cluster) }
+  it { is_expected.to validate_presence_of(:cluster) }
+
+  describe '#name' do
+    it 'is .application_name' do
+      expect(subject.name).to eq(described_class.application_name)
+    end
+
+    it 'is recorded in Clusters::Cluster::APPLICATIONS' do
+      expect(Clusters::Cluster::APPLICATIONS[subject.name]).to eq(described_class)
+    end
+  end
+
+  describe 'status state machine' do
+    describe '#make_installing' do
+      subject { create(application_name, :scheduled) }
+
+      it 'is installing' do
+        subject.make_installing!
+
+        expect(subject).to be_installing
+      end
+    end
+
+    describe '#make_installed' do
+      subject { create(application_name, :installing) }
+
+      it 'is installed' do
+        subject.make_installed
+
+        expect(subject).to be_installed
+      end
+    end
+
+    describe '#make_errored' do
+      subject { create(application_name, :installing) }
+      let(:reason) { 'some errors' }
+
+      it 'is errored' do
+        subject.make_errored(reason)
+
+        expect(subject).to be_errored
+        expect(subject.status_reason).to eq(reason)
+      end
+    end
+
+    describe '#make_scheduled' do
+      subject { create(application_name, :installable) }
+
+      it 'is scheduled' do
+        subject.make_scheduled
+
+        expect(subject).to be_scheduled
+      end
+
+      describe 'when was errored' do
+        subject { create(application_name, :errored) }
+
+        it 'clears #status_reason' do
+          expect(subject.status_reason).not_to be_nil
+
+          subject.make_scheduled!
+
+          expect(subject.status_reason).to be_nil
+        end
+      end
+    end
+  end
+end