1 files changed, 24 insertions, 0 deletions
diff --git a/spec/models/deployment_spec.rb b/spec/models/deployment_spec.rb
index 7df3df4bb9e..bfff639ad78 100644
--- a/spec/models/deployment_spec.rb
+++ b/spec/models/deployment_spec.rb
@@ -15,4 +15,28 @@ describe Deployment, models: true do
 
   it { is_expected.to validate_presence_of(:ref) }
   it { is_expected.to validate_presence_of(:sha) }
+
+  describe '#includes_commit?' do
+    let(:project)     { create(:project) }
+    let(:environment) { create(:environment, project: project) }
+    let(:deployment) do
+      create(:deployment, environment: environment, sha: project.commit.id)
+    end
+
+    context 'when there is no project commit' do
+      it 'returns false' do
+        commit = project.commit('feature')
+
+        expect(deployment.includes_commit?(commit)).to be false
+      end
+    end
+
+    context 'when they share the same tree branch' do
+      it 'returns true' do
+        commit = project.commit
+
+        expect(deployment.includes_commit?(commit)).to be true
+      end
+    end
+  end
 end