1 files changed, 27 insertions, 0 deletions
diff --git a/spec/lib/gitlab/diff/file_collection/base_spec.rb b/spec/lib/gitlab/diff/file_collection/base_spec.rb
new file mode 100644
index 00000000000..00d3aa47301
--- /dev/null
+++ b/spec/lib/gitlab/diff/file_collection/base_spec.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Diff::FileCollection::Base do
+  let(:merge_request) { create(:merge_request) }
+  let(:diffable) { merge_request.merge_request_diff }
+  let(:diff_options) { {} }
+
+  describe '#overflow?' do
+    subject(:overflown) { described_class.new(diffable, project: merge_request.project, diff_options: diff_options).overflow? }
+
+    context 'when it is not overflown' do
+      it 'returns false' do
+        expect(overflown).to eq(false)
+      end
+    end
+
+    context 'when it is overflown' do
+      let(:diff_options) { { max_files: 1 } }
+
+      it 'returns true' do
+        expect(overflown).to eq(true)
+      end
+    end
+  end
+end