1 files changed, 67 insertions, 0 deletions
diff --git a/spec/features/projects/blobs/blame_spec.rb b/spec/features/projects/blobs/blame_spec.rb
new file mode 100644
index 00000000000..bb3b5cd931c
--- /dev/null
+++ b/spec/features/projects/blobs/blame_spec.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'File blame', :js do
+  include TreeHelper
+
+  let_it_be(:project) { create(:project, :public, :repository) }
+
+  let(:path) { 'CHANGELOG' }
+
+  def visit_blob_blame(path)
+    visit project_blame_path(project, tree_join('master', path))
+    wait_for_all_requests
+  end
+
+  it 'displays the blame page without pagination' do
+    visit_blob_blame(path)
+
+    expect(page).to have_css('.blame-commit')
+    expect(page).not_to have_css('.gl-pagination')
+  end
+
+  context 'when blob length is over the blame range limit' do
+    before do
+      stub_const('Projects::BlameService::PER_PAGE', 2)
+    end
+
+    it 'displays two first lines of the file with pagination' do
+      visit_blob_blame(path)
+
+      expect(page).to have_css('.blame-commit')
+      expect(page).to have_css('.gl-pagination')
+
+      expect(page).to have_css('#L1')
+      expect(page).not_to have_css('#L3')
+      expect(find('.page-link.active')).to have_text('1')
+    end
+
+    context 'when user clicks on the next button' do
+      before do
+        visit_blob_blame(path)
+
+        find('.js-next-button').click
+      end
+
+      it 'displays next two lines of the file with pagination' do
+        expect(page).not_to have_css('#L1')
+        expect(page).to have_css('#L3')
+        expect(find('.page-link.active')).to have_text('2')
+      end
+    end
+
+    context 'when feature flag disabled' do
+      before do
+        stub_feature_flags(blame_page_pagination: false)
+      end
+
+      it 'displays the blame page without pagination' do
+        visit_blob_blame(path)
+
+        expect(page).to have_css('.blame-commit')
+        expect(page).not_to have_css('.gl-pagination')
+      end
+    end
+  end
+end