Fix broken Spinach tests caused by changes in !6550

Partial fix to #23378

features/steps/project/commits/commits.rb

@@ -42,15 +42,16 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
   end
 
   step 'I fill compare fields with branches' do
-    fill_in 'from', with: 'feature'
-    fill_in 'to',   with: 'master'
+    select_using_dropdown('from', 'feature')
+    select_using_dropdown('to', 'master')
 
     click_button 'Compare'
   end
 
   step 'I fill compare fields with refs' do
-    fill_in "from", with: sample_commit.parent_id
-    fill_in "to",   with: sample_commit.id
+    select_using_dropdown('from', sample_commit.parent_id)
+    select_using_dropdown('to', sample_commit.id)
+
     click_button "Compare"
   end
 
@@ -97,8 +98,8 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
   end
 
   step 'I fill compare fields with branches' do
-    fill_in 'from', with: 'master'
-    fill_in 'to',   with: 'feature'
+    select_using_dropdown('from', 'master')
+    select_using_dropdown('to', 'feature')
 
     click_button 'Compare'
   end
@@ -182,4 +183,11 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
     expect(page).to have_content "More submodules"
     expect(page).not_to have_content "Change some files"
   end
+
+  def select_using_dropdown(dropdown_type, selection)
+    dropdown = find(".js-compare-#{dropdown_type}-dropdown")
+    dropdown.find(".compare-dropdown-toggle").click
+    dropdown.fill_in("Filter by branch/tag", with: selection)
+    find_link(selection, visible: true).click
+  end
 end

spec/features/compare_spec.rb

@@ -45,6 +45,6 @@ describe "Compare", js: true do
     dropdown = find(".js-compare-#{dropdown_type}-dropdown")
     dropdown.find(".compare-dropdown-toggle").click
     dropdown.fill_in("Filter by branch/tag", with: selection)
-    click_link selection
+    find_link(selection, visible: true).click
   end
 end