add braveShiedsStats test for duplicated ads+trackers blocked resources

test/app/components/braveShields/braveShieldsStatsTest.tsx

@@ -96,6 +96,26 @@ describe('BraveShieldsStats component', () => {
 
       assert.equal(assertion2, true)
     })
+
+    it('properly merges ads + trackers in the same list without duplicates', () => {
+      const componentId = 'totalAdsTrackersBlockedStat'
+      const target = { target: { id: componentId } }
+      const newProps = Object.assign(fakeProps, {
+        adsBlockedResources: [
+          'https://everbodys-got-something-to-hide-except-me-and-my-monkey.cool',
+          'https://everbodys-got-something-to-hide-except-me-and-my-monkey.cool'
+        ],
+        trackersBlockedResources: [
+          'https://everbodys-got-something2-to-hide-except-me-and-my-monkey.cool'
+        ]
+      })
+
+      const wrapper = shallow(baseComponent(newProps))
+      wrapper.find(`#${componentId}`).simulate('click', target)
+
+      const assertion = wrapper.find('#blockedResourcesStats')
+      assert.equal(assertion.children().length, 1)
+    })
   })
 
   describe('stats for https redirected', () => {