Add tests for unintentional filtering bug in MR (cf. !3872)

CHANGELOG

@@ -43,7 +43,7 @@ v 8.8.0 (unreleased)
   - API support for the 'since' and 'until' operators on commit requests (Paco Guzman)
   - Fix Gravatar hint in user profile when Gravatar is disabled. !3988 (Artem Sidorenko)
   - Expire repository exists? and has_visible_content? caches after a push if necessary
-  - Fix unintentional filtering bug in issues sorted by milestone due (Takuya Noguchi)
+  - Fix unintentional filtering bug in Issue/MR sorted by milestone due (Takuya Noguchi)
   - Fix adding a todo for private group members (Ahmad Sherif)
   - Bump ace-rails-ap gem version from 2.0.1 to 4.0.2 which upgrades Ace Editor from 1.1.2 to 1.2.3
   - Total method execution timings are no longer tracked

spec/features/merge_requests/user_lists_merge_requests_spec.rb

@@ -38,6 +38,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
     expect(page).to have_content 'lfs'
     expect(page).not_to have_content 'fix'
     expect(page).not_to have_content 'markdown'
+    expect(count_merge_requests).to eq(1)
   end
 
   it 'filters on a specific assignee' do
@@ -46,6 +47,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
     expect(page).not_to have_content 'lfs'
     expect(page).to have_content 'fix'
     expect(page).to have_content 'markdown'
+    expect(count_merge_requests).to eq(2)
   end
 
   it 'sorts by newest' do
@@ -53,6 +55,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
 
     expect(first_merge_request).to include('lfs')
     expect(last_merge_request).to include('fix')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'sorts by oldest' do
@@ -60,30 +63,35 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
 
     expect(first_merge_request).to include('fix')
     expect(last_merge_request).to include('lfs')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'sorts by last updated' do
     visit_merge_requests(project, sort: sort_value_recently_updated)
 
     expect(first_merge_request).to include('lfs')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'sorts by oldest updated' do
     visit_merge_requests(project, sort: sort_value_oldest_updated)
 
     expect(first_merge_request).to include('markdown')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'sorts by milestone due soon' do
     visit_merge_requests(project, sort: sort_value_milestone_soon)
 
     expect(first_merge_request).to include('fix')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'sorts by milestone due later' do
     visit_merge_requests(project, sort: sort_value_milestone_later)
 
     expect(first_merge_request).to include('markdown')
+    expect(count_merge_requests).to eq(3)
   end
 
   it 'filters on one label and sorts by due soon' do
@@ -94,6 +102,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
                                   sort: sort_value_due_date_soon)
 
     expect(first_merge_request).to include('fix')
+    expect(count_merge_requests).to eq(1)
   end
 
   context 'while filtering on two labels' do
@@ -110,6 +119,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
                                     sort: sort_value_due_date_soon)
 
       expect(first_merge_request).to include('fix')
+      expect(count_merge_requests).to eq(1)
     end
 
     context 'filter on assignee and' do
@@ -119,6 +129,7 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
                                       sort: sort_value_due_date_soon)
 
         expect(first_merge_request).to include('fix')
+        expect(count_merge_requests).to eq(1)
       end
     end
   end
@@ -134,4 +145,8 @@ describe 'Projects > Merge requests > User lists merge requests', feature: true
   def last_merge_request
     page.all('ul.mr-list > li').last.text
   end
+
+  def count_merge_requests
+    page.all('ul.mr-list > li').count
+  end
 end