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Diffstat (limited to 'spec/lib/gitlab/diff/highlight_cache_spec.rb')
-rw-r--r-- | spec/lib/gitlab/diff/highlight_cache_spec.rb | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/spec/lib/gitlab/diff/highlight_cache_spec.rb b/spec/lib/gitlab/diff/highlight_cache_spec.rb new file mode 100644 index 00000000000..bfcfed4231f --- /dev/null +++ b/spec/lib/gitlab/diff/highlight_cache_spec.rb @@ -0,0 +1,70 @@ +# frozen_string_literal: true + +require 'spec_helper' + +describe Gitlab::Diff::HighlightCache do + let(:merge_request) { create(:merge_request_with_diffs) } + + subject(:cache) { described_class.new(merge_request.diffs, backend: backend) } + + describe '#decorate' do + let(:backend) { double('backend').as_null_object } + + # Manually creates a Diff::File object to avoid triggering the cache on + # the FileCollection::MergeRequestDiff + let(:diff_file) do + diffs = merge_request.diffs + raw_diff = diffs.diffable.raw_diffs(diffs.diff_options.merge(paths: ['CHANGELOG'])).first + Gitlab::Diff::File.new(raw_diff, + repository: diffs.project.repository, + diff_refs: diffs.diff_refs, + fallback_diff_refs: diffs.fallback_diff_refs) + end + + it 'does not calculate highlighting when reading from cache' do + cache.write_if_empty + cache.decorate(diff_file) + + expect_any_instance_of(Gitlab::Diff::Highlight).not_to receive(:highlight) + + diff_file.highlighted_diff_lines + end + + it 'assigns highlighted diff lines to the DiffFile' do + cache.write_if_empty + cache.decorate(diff_file) + + expect(diff_file.highlighted_diff_lines.size).to be > 5 + end + + it 'submits a single reading from the cache' do + cache.decorate(diff_file) + cache.decorate(diff_file) + + expect(backend).to have_received(:read).with(cache.key).once + end + end + + describe '#write_if_empty' do + let(:backend) { double('backend', read: {}).as_null_object } + + it 'submits a single writing to the cache' do + cache.write_if_empty + cache.write_if_empty + + expect(backend).to have_received(:write).with(cache.key, + hash_including('CHANGELOG-false-false-false'), + expires_in: 1.week).once + end + end + + describe '#clear' do + let(:backend) { double('backend').as_null_object } + + it 'clears cache' do + cache.clear + + expect(backend).to have_received(:delete).with(cache.key) + end + end +end |