Show a notice for diffs that are too large

This builds on the changes introduced in
https://gitlab.com/gitlab-org/gitlab_git/merge_requests/72 and results
in merge requests with large diffs (e.g. due to them containing minified
CSS) loading much faster.

1 files changed, 14 insertions, 0 deletions

diff --git a/spec/lib/gitlab/diff/file_spec.rb b/spec/lib/gitlab/diff/file_spec.rb
index 0d9694f2c13..a0cbef6e6a4 100644
--- a/spec/lib/gitlab/diff/file_spec.rb
+++ b/spec/lib/gitlab/diff/file_spec.rb
@@ -18,4 +18,18 @@ describe Gitlab::Diff::File, lib: true do
   describe :mode_changed? do
     it { expect(diff_file.mode_changed?).to be_falsey }
   end
+
+  describe '#too_large?' do
+    it 'returns true for a file that is too large' do
+      expect(diff).to receive(:too_large?).and_return(true)
+
+      expect(diff_file.too_large?).to eq(true)
+    end
+
+    it 'returns false for a file that is small enough' do
+      expect(diff).to receive(:too_large?).and_return(false)
+
+      expect(diff_file.too_large?).to eq(false)
+    end
+  end
 end