1 files changed, 48 insertions, 0 deletions
diff --git a/spec/lib/gitlab/alert_management/fingerprint_spec.rb b/spec/lib/gitlab/alert_management/fingerprint_spec.rb
new file mode 100644
index 00000000000..7865d667f71
--- /dev/null
+++ b/spec/lib/gitlab/alert_management/fingerprint_spec.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::AlertManagement::Fingerprint do
+  using RSpec::Parameterized::TableSyntax
+
+  let_it_be(:alert) { create(:alert_management_alert) }
+
+  describe '.generate' do
+    subject { described_class.generate(data) }
+
+    context 'when data is an array' do
+      let(:data) { [1, 'fingerprint', 'given'] }
+
+      it 'flattens the array' do
+        expect_next_instance_of(described_class) do |obj|
+          expect(obj).to receive(:flatten_array)
+        end
+
+        subject
+      end
+
+      it 'returns the hashed fingerprint' do
+        expected_fingerprint = Digest::SHA1.hexdigest(data.flatten.map!(&:to_s).join)
+        expect(subject).to eq(expected_fingerprint)
+      end
+    end
+
+    context 'when data is a non-array type' do
+      where(:data) do
+        [
+          111,
+          'fingerprint',
+          :fingerprint,
+          true,
+          { test: true }
+        ]
+      end
+
+      with_them do
+        it 'performs like a hashed fingerprint' do
+          expect(subject).to eq(Digest::SHA1.hexdigest(data.to_s))
+        end
+      end
+    end
+  end
+end