1 files changed, 41 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/runner/metrics_spec.rb b/spec/lib/gitlab/ci/runner/metrics_spec.rb
new file mode 100644
index 00000000000..3c459271092
--- /dev/null
+++ b/spec/lib/gitlab/ci/runner/metrics_spec.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Ci::Runner::Metrics, :prometheus do
+  subject { described_class.new }
+
+  describe '#increment_runner_authentication_success_counter' do
+    it 'increments count for same type' do
+      expect { subject.increment_runner_authentication_success_counter(runner_type: 'instance_type') }
+        .to change { described_class.runner_authentication_success_counter.get(runner_type: 'instance_type') }.by(1)
+    end
+
+    it 'does not increment count for different type' do
+      expect { subject.increment_runner_authentication_success_counter(runner_type: 'group_type') }
+        .to not_change { described_class.runner_authentication_success_counter.get(runner_type: 'project_type') }
+    end
+
+    it 'does not increment failure count' do
+      expect { subject.increment_runner_authentication_success_counter(runner_type: 'project_type') }
+        .to not_change { described_class.runner_authentication_failure_counter.get }
+    end
+
+    it 'throws ArgumentError for invalid runner type' do
+      expect { subject.increment_runner_authentication_success_counter(runner_type: 'unknown_type') }
+        .to raise_error(ArgumentError, 'unknown runner type: unknown_type')
+    end
+  end
+
+  describe '#increment_runner_authentication_failure_counter' do
+    it 'increments count' do
+      expect { subject.increment_runner_authentication_failure_counter }
+        .to change { described_class.runner_authentication_failure_counter.get }.by(1)
+    end
+
+    it 'does not increment success count' do
+      expect { subject.increment_runner_authentication_failure_counter }
+        .to not_change { described_class.runner_authentication_success_counter.get(runner_type: 'instance_type') }
+    end
+  end
+end