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