1 files changed, 45 insertions, 0 deletions
diff --git a/spec/models/analytics/instance_statistics/measurement_spec.rb b/spec/models/analytics/instance_statistics/measurement_spec.rb
new file mode 100644
index 00000000000..4df847ea524
--- /dev/null
+++ b/spec/models/analytics/instance_statistics/measurement_spec.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Analytics::InstanceStatistics::Measurement, type: :model do
+  describe 'validation' do
+    let!(:measurement) { create(:instance_statistics_measurement) }
+
+    it { is_expected.to validate_presence_of(:recorded_at) }
+    it { is_expected.to validate_presence_of(:identifier) }
+    it { is_expected.to validate_presence_of(:count) }
+    it { is_expected.to validate_uniqueness_of(:recorded_at).scoped_to(:identifier) }
+  end
+
+  describe 'identifiers enum' do
+    it 'maps to the correct values' do
+      expect(described_class.identifiers).to eq({
+        projects: 1,
+        users: 2,
+        issues: 3,
+        merge_requests: 4,
+        groups: 5,
+        pipelines: 6
+      }.with_indifferent_access)
+    end
+  end
+
+  describe 'scopes' do
+    let_it_be(:measurement_1) { create(:instance_statistics_measurement, :project_count, recorded_at: 10.days.ago) }
+    let_it_be(:measurement_2) { create(:instance_statistics_measurement, :project_count, recorded_at: 2.days.ago) }
+    let_it_be(:measurement_3) { create(:instance_statistics_measurement, :group_count, recorded_at: 5.days.ago) }
+
+    describe '.order_by_latest' do
+      subject { described_class.order_by_latest }
+
+      it { is_expected.to eq([measurement_2, measurement_3, measurement_1]) }
+    end
+
+    describe '.with_identifier' do
+      subject { described_class.with_identifier(:projects) }
+
+      it { is_expected.to match_array([measurement_1, measurement_2]) }
+    end
+  end
+end