496 lines
12 KiB
Ruby
496 lines
12 KiB
Ruby
require 'spec_helper'
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describe Gitlab::Git::DiffCollection, seed_helper: true do
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subject do
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Gitlab::Git::DiffCollection.new(
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iterator,
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max_files: max_files,
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max_lines: max_lines,
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limits: limits,
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expanded: expanded
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)
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end
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let(:iterator) { MutatingConstantIterator.new(file_count, fake_diff(line_length, line_count)) }
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let(:file_count) { 0 }
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let(:line_length) { 1 }
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let(:line_count) { 1 }
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let(:max_files) { 10 }
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let(:max_lines) { 100 }
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let(:limits) { true }
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let(:expanded) { true }
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describe '#to_a' do
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subject { super().to_a }
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it { is_expected.to be_kind_of ::Array }
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end
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describe '#decorate!' do
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let(:file_count) { 3 }
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it 'modifies the array in place' do
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count = 0
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subject.decorate! { |d| !d.nil? && count += 1 }
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expect(subject.to_a).to eq([1, 2, 3])
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expect(count).to eq(3)
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end
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it 'avoids future iterator iterations' do
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subject.decorate! { |d| d unless d.nil? }
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expect(iterator).not_to receive(:each)
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subject.overflow?
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end
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end
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context 'overflow handling' do
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context 'adding few enough files' do
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let(:file_count) { 3 }
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context 'and few enough lines' do
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let(:line_count) { 10 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('3') }
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end
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describe '#size' do
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it { expect(subject.size).to eq(3) }
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it 'does not change after peeking' do
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subject.any?
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expect(subject.size).to eq(3)
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end
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end
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context 'when limiting is disabled' do
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let(:limits) { false }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('3') }
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end
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describe '#size' do
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it { expect(subject.size).to eq(3) }
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it 'does not change after peeking' do
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subject.any?
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expect(subject.size).to eq(3)
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end
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end
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end
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end
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context 'and too many lines' do
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let(:line_count) { 1000 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_truthy }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('0+') }
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end
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it { expect(subject.size).to eq(0) }
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context 'when limiting is disabled' do
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let(:limits) { false }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('3') }
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end
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it { expect(subject.size).to eq(3) }
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end
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end
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end
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context 'adding too many files' do
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let(:file_count) { 11 }
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context 'and few enough lines' do
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let(:line_count) { 1 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_truthy }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('10+') }
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end
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it { expect(subject.size).to eq(10) }
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context 'when limiting is disabled' do
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let(:limits) { false }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('11') }
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end
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it { expect(subject.size).to eq(11) }
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end
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end
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context 'and too many lines' do
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let(:line_count) { 30 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_truthy }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('3+') }
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end
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it { expect(subject.size).to eq(3) }
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context 'when limiting is disabled' do
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let(:limits) { false }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('11') }
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end
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it { expect(subject.size).to eq(11) }
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end
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end
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end
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context 'adding exactly the maximum number of files' do
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let(:file_count) { 10 }
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context 'and few enough lines' do
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let(:line_count) { 1 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('10') }
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end
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it { expect(subject.size).to eq(10) }
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end
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end
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context 'adding too many bytes' do
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let(:file_count) { 10 }
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let(:line_length) { 5200 }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_truthy }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('9+') }
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end
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it { expect(subject.size).to eq(9) }
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context 'when limiting is disabled' do
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let(:limits) { false }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_falsey }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('10') }
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end
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it { expect(subject.size).to eq(10) }
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end
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end
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end
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describe 'empty collection' do
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subject { Gitlab::Git::DiffCollection.new([]) }
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describe '#overflow?' do
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subject { super().overflow? }
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it { is_expected.to be_falsey }
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end
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describe '#empty?' do
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subject { super().empty? }
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it { is_expected.to be_truthy }
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end
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describe '#size' do
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subject { super().size }
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it { is_expected.to eq(0) }
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end
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describe '#real_size' do
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subject { super().real_size }
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it { is_expected.to eq('0')}
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end
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end
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describe '#each' do
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context 'when diff are too large' do
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let(:collection) do
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Gitlab::Git::DiffCollection.new([{ diff: 'a' * 204800 }])
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end
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it 'yields Diff instances even when they are too large' do
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expect { |b| collection.each(&b) }
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.to yield_with_args(an_instance_of(Gitlab::Git::Diff))
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end
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it 'prunes diffs that are too large' do
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diff = nil
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collection.each do |d|
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diff = d
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end
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expect(diff.diff).to eq('')
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end
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end
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context 'when diff is quite large will collapse by default' do
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let(:iterator) { [{ diff: 'a' * 20480 }] }
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context 'when no collapse is set' do
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let(:expanded) { true }
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it 'yields Diff instances even when they are quite big' do
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expect { |b| subject.each(&b) }
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.to yield_with_args(an_instance_of(Gitlab::Git::Diff))
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end
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it 'does not prune diffs' do
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diff = nil
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subject.each do |d|
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diff = d
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end
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expect(diff.diff).not_to eq('')
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end
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end
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context 'when no collapse is unset' do
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let(:expanded) { false }
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it 'yields Diff instances even when they are quite big' do
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expect { |b| subject.each(&b) }
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.to yield_with_args(an_instance_of(Gitlab::Git::Diff))
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end
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it 'prunes diffs that are quite big' do
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diff = nil
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subject.each do |d|
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diff = d
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end
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expect(diff.diff).to eq('')
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end
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context 'when go over safe limits on files' do
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let(:iterator) { [fake_diff(1, 1)] * 4 }
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before do
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stub_const('Gitlab::Git::DiffCollection::DEFAULT_LIMITS', { max_files: 2, max_lines: max_lines })
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end
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it 'prunes diffs by default even little ones' do
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subject.each_with_index do |d, i|
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if i < 2
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expect(d.diff).not_to eq('')
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else # 90 lines
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expect(d.diff).to eq('')
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end
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end
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end
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end
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context 'when go over safe limits on lines' do
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let(:iterator) do
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[
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fake_diff(1, 45),
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fake_diff(1, 45),
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fake_diff(1, 20480),
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fake_diff(1, 1)
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]
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end
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before do
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stub_const('Gitlab::Git::DiffCollection::DEFAULT_LIMITS', { max_files: max_files, max_lines: 80 })
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end
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it 'prunes diffs by default even little ones' do
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subject.each_with_index do |d, i|
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if i < 2
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expect(d.diff).not_to eq('')
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else # 90 lines
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expect(d.diff).to eq('')
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end
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end
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end
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end
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context 'when go over safe limits on bytes' do
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let(:iterator) do
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[
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fake_diff(1, 45),
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fake_diff(1, 45),
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fake_diff(1, 20480),
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fake_diff(1, 1)
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]
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end
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before do
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stub_const('Gitlab::Git::DiffCollection::DEFAULT_LIMITS', { max_files: max_files, max_lines: 80 })
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end
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it 'prunes diffs by default even little ones' do
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subject.each_with_index do |d, i|
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if i < 2
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expect(d.diff).not_to eq('')
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else # > 80 bytes
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expect(d.diff).to eq('')
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end
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end
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end
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end
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end
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context 'when limiting is disabled' do
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let(:limits) { false }
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it 'yields Diff instances even when they are quite big' do
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expect { |b| subject.each(&b) }
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.to yield_with_args(an_instance_of(Gitlab::Git::Diff))
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end
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it 'does not prune diffs' do
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diff = nil
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subject.each do |d|
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diff = d
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end
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expect(diff.diff).not_to eq('')
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end
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end
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end
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end
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def fake_diff(line_length, line_count)
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{ 'diff' => "#{'a' * line_length}\n" * line_count }
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end
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class MutatingConstantIterator
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include Enumerable
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def initialize(count, value)
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@count = count
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@value = value
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end
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def each
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return enum_for(:each) unless block_given?
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loop do
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break if @count.zero?
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# It is critical to decrement before yielding. We may never reach the lines after 'yield'.
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@count -= 1
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yield @value
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end
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end
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end
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end
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