1 files changed, 51 insertions, 0 deletions
diff --git a/spec/support/shared_examples/models/commit_signature_shared_examples.rb b/spec/support/shared_examples/models/commit_signature_shared_examples.rb
new file mode 100644
index 00000000000..56d5c1da3af
--- /dev/null
+++ b/spec/support/shared_examples/models/commit_signature_shared_examples.rb
@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'commit signature' do
+  describe 'associations' do
+    it { is_expected.to belong_to(:project).required }
+  end
+
+  describe 'validation' do
+    subject { described_class.new }
+
+    it { is_expected.to validate_presence_of(:commit_sha) }
+    it { is_expected.to validate_presence_of(:project_id) }
+  end
+
+  describe '.safe_create!' do
+    it 'finds a signature by commit sha if it existed' do
+      signature
+
+      expect(described_class.safe_create!(commit_sha: commit_sha)).to eq(signature)
+    end
+
+    it 'creates a new signature if it was not found' do
+      expect { described_class.safe_create!(attributes) }.to change { described_class.count }.by(1)
+    end
+
+    it 'assigns the correct attributes when creating' do
+      signature = described_class.safe_create!(attributes)
+
+      expect(signature).to have_attributes(attributes)
+    end
+
+    it 'does not raise an error in case of a race condition' do
+      expect(described_class).to receive(:find_by).and_return(nil, instance_double(described_class, persisted?: true))
+
+      expect(described_class).to receive(:create).and_raise(ActiveRecord::RecordNotUnique)
+      allow(described_class).to receive(:create).and_call_original
+
+      described_class.safe_create!(attributes)
+    end
+  end
+
+  describe '#commit' do
+    it 'fetches the commit through the project' do
+      expect_next_instance_of(Project) do |instance|
+        expect(instance).to receive(:commit).with(commit_sha).and_return(commit)
+      end
+
+      signature.commit
+    end
+  end
+end