require 'spec_helper' describe DiffViewer::Base do include FakeBlobHelpers let(:project) { create(:project, :repository) } let(:commit) { project.commit('570e7b2abdd848b95f2f578043fc23bd6f6fd24d') } let(:diff_file) { commit.diffs.diff_file_with_new_path('files/ruby/popen.rb') } let(:viewer_class) do Class.new(described_class) do include DiffViewer::ServerSide self.extensions = %w(jpg) self.binary = true self.collapse_limit = 1.megabyte self.size_limit = 5.megabytes end end let(:viewer) { viewer_class.new(diff_file) } describe '.can_render?' do context 'when the extension is supported' do let(:commit) { project.commit('2f63565e7aac07bcdadb654e253078b727143ec4') } let(:diff_file) { commit.diffs.diff_file_with_new_path('files/images/6049019_460s.jpg') } context 'when the binaryness matches' do it 'returns true' do expect(viewer_class.can_render?(diff_file)).to be_truthy end end context 'when the binaryness does not match' do before do allow(diff_file.old_blob).to receive(:binary?).and_return(false) allow(diff_file.new_blob).to receive(:binary?).and_return(false) end it 'returns false' do expect(viewer_class.can_render?(diff_file)).to be_falsey end end end context 'when the file type is supported' do let(:commit) { project.commit('1a0b36b3cdad1d2ee32457c102a8c0b7056fa863') } let(:diff_file) { commit.diffs.diff_file_with_new_path('LICENSE') } before do viewer_class.file_types = %i(license) viewer_class.binary = false end context 'when the binaryness matches' do it 'returns true' do expect(viewer_class.can_render?(diff_file)).to be_truthy end end context 'when the binaryness does not match' do before do allow(diff_file.old_blob).to receive(:binary?).and_return(true) allow(diff_file.new_blob).to receive(:binary?).and_return(true) end it 'returns false' do expect(viewer_class.can_render?(diff_file)).to be_falsey end end end context 'when the extension and file type are not supported' do it 'returns false' do expect(viewer_class.can_render?(diff_file)).to be_falsey end end context 'when the file was renamed and only the old blob is supported' do let(:commit) { project.commit('2f63565e7aac07bcdadb654e253078b727143ec4') } let(:diff_file) { commit.diffs.diff_file_with_new_path('files/images/6049019_460s.jpg') } before do allow(diff_file).to receive(:renamed_file?).and_return(true) allow(diff_file.new_blob).to receive(:extension).and_return('jpeg') end it 'returns false' do expect(viewer_class.can_render?(diff_file)).to be_falsey end end end describe '#collapsed?' do context 'when the combined blob size is larger than the collapse limit' do before do allow(diff_file.old_blob).to receive(:raw_size).and_return(512.kilobytes) allow(diff_file.new_blob).to receive(:raw_size).and_return(513.kilobytes) end it 'returns true' do expect(viewer.collapsed?).to be_truthy end end context 'when the combined blob size is smaller than the collapse limit' do it 'returns false' do expect(viewer.collapsed?).to be_falsey end end end describe '#too_large?' do context 'when the combined blob size is larger than the size limit' do before do allow(diff_file.old_blob).to receive(:raw_size).and_return(2.megabytes) allow(diff_file.new_blob).to receive(:raw_size).and_return(4.megabytes) end it 'returns true' do expect(viewer.too_large?).to be_truthy end end context 'when the blob size is smaller than the size limit' do it 'returns false' do expect(viewer.too_large?).to be_falsey end end end describe '#render_error' do context 'when the combined blob size is larger than the size limit' do before do allow(diff_file.old_blob).to receive(:raw_size).and_return(2.megabytes) allow(diff_file.new_blob).to receive(:raw_size).and_return(4.megabytes) end it 'returns :too_large' do expect(viewer.render_error).to eq(:too_large) end end context 'when the combined blob size is smaller than the size limit' do it 'returns nil' do expect(viewer.render_error).to be_nil end end end end