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author | Alex Lossent <alexandre.lossent@cern.ch> | 2015-04-27 19:06:51 +0300 |
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committer | Alex Lossent <alexandre.lossent@cern.ch> | 2015-05-05 19:51:12 +0300 |
commit | affd049dc4427d749b97eaee37a5d54873016657 (patch) | |
tree | 94541bfb05f098f67cf11d72eede4791d6e5b801 /spec/helpers | |
parent | 5bff135fb3dbd1af855f8cd94b4bed76d2cbc42e (diff) |
Improve handling of large diffs
Diffs with a large number of changed lines time out (504 HTTP error) or
generate a HTML page that's so heavy web browsers struggle with it.
https://github.com/gitlabhq/gitlabhq/pull/5014 introduced limits on
commit line count so that only a safe portion is rendered. This was
later undone by code refactoring in be5b6db8, e0eb4803 and c741fcab.
This patch re-introduces a safe limit on number of lines.
Diffstat (limited to 'spec/helpers')
-rw-r--r-- | spec/helpers/diff_helper_spec.rb | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/spec/helpers/diff_helper_spec.rb b/spec/helpers/diff_helper_spec.rb index 95719b4b49f..dd4c1d645e2 100644 --- a/spec/helpers/diff_helper_spec.rb +++ b/spec/helpers/diff_helper_spec.rb @@ -5,7 +5,8 @@ describe DiffHelper do let(:project) { create(:project) } let(:commit) { project.commit(sample_commit.id) } - let(:diff) { commit.diffs.first } + let(:diffs) { commit.diffs } + let(:diff) { diffs.first } let(:diff_file) { Gitlab::Diff::File.new(diff) } describe 'diff_hard_limit_enabled?' do @@ -30,6 +31,57 @@ describe DiffHelper do end end + describe 'allowed_diff_lines' do + it 'should return hard limit for number of lines in a diff if force diff is true' do + allow(controller).to receive(:params) { { force_show_diff: true } } + expect(allowed_diff_lines).to eq(50000) + end + + it 'should return safe limit for numbers of lines a diff if force diff is false' do + expect(allowed_diff_lines).to eq(5000) + end + end + + describe 'safe_diff_files' do + it 'should return all files from a commit that is smaller than safe limits' do + expect(safe_diff_files(diffs).length).to eq(2) + end + + it 'should return only the first file if the diff line count in the 2nd file takes the total beyond safe limits' do + diffs[1].diff.stub(lines: [""] * 4999) #simulate 4999 lines + expect(safe_diff_files(diffs).length).to eq(1) + end + + it 'should return all files from a commit that is beyond safe limit for numbers of lines if force diff is true' do + allow(controller).to receive(:params) { { force_show_diff: true } } + diffs[1].diff.stub(lines: [""] * 4999) #simulate 4999 lines + expect(safe_diff_files(diffs).length).to eq(2) + end + + it 'should return only the first file if the diff line count in the 2nd file takes the total beyond hard limits' do + allow(controller).to receive(:params) { { force_show_diff: true } } + diffs[1].diff.stub(lines: [""] * 49999) #simulate 49999 lines + expect(safe_diff_files(diffs).length).to eq(1) + end + + it 'should return only a safe number of file diffs if a commit touches more files than the safe limits' do + large_diffs = diffs * 100 #simulate 200 diffs + expect(safe_diff_files(large_diffs).length).to eq(100) + end + + it 'should return all file diffs if a commit touches more files than the safe limits but force diff is true' do + allow(controller).to receive(:params) { { force_show_diff: true } } + large_diffs = diffs * 100 #simulate 200 diffs + expect(safe_diff_files(large_diffs).length).to eq(200) + end + + it 'should return a limited file diffs if a commit touches more files than the hard limits and force diff is true' do + allow(controller).to receive(:params) { { force_show_diff: true } } + very_large_diffs = diffs * 1000 #simulate 2000 diffs + expect(safe_diff_files(very_large_diffs).length).to eq(1000) + end + end + describe 'parallel_diff' do it 'should return an array of arrays containing the parsed diff' do expect(parallel_diff(diff_file, 0)). |