Add specs for active record peek view

spec/lib/peek/views/active_record_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Peek::Views::ActiveRecord, :request_store do
+  context 'when a class defines thresholds' do
+    let(:threshold_view) do
+      Class.new(described_class) do
+        def self.thresholds
+          {
+            calls: 1,
+            cached_calls: 1,
+            duration: 10,
+            individual_call: 5
+          }
+        end
+
+        def key
+          'threshold-view'
+        end
+      end.new
+    end
+
+    context 'when the results exceed the cached calls threshold' do
+      before do
+        allow(threshold_view)
+          .to receive(:detail_store).and_return([{ duration: 0.001, cached: 'cached' }, { duration: 0.001, cached: 'cached' }])
+      end
+
+      it 'adds a warning to the results key' do
+        expect(threshold_view.results).to include(warnings: [a_string_matching('threshold-view cached calls')])
+      end
+    end
+  end
+end