debian-mirror-gitlab/spec/lib/gitlab/ci/trace/chunked_io_spec.rb
2019-02-15 15:39:39 +05:30

446 lines
11 KiB
Ruby

require 'spec_helper'
describe Gitlab::Ci::Trace::ChunkedIO, :clean_gitlab_redis_cache do
include ChunkedIOHelpers
set(:build) { create(:ci_build, :running) }
let(:chunked_io) { described_class.new(build) }
before do
stub_feature_flags(ci_enable_live_trace: true)
end
context "#initialize" do
context 'when a chunk exists' do
before do
build.trace.set('ABC')
end
it { expect(chunked_io.size).to eq(3) }
end
context 'when two chunks exist' do
before do
stub_buffer_size(4)
build.trace.set('ABCDEF')
end
it { expect(chunked_io.size).to eq(6) }
end
context 'when no chunks exists' do
it { expect(chunked_io.size).to eq(0) }
end
end
context "#seek" do
subject { chunked_io.seek(pos, where) }
before do
build.trace.set(sample_trace_raw)
end
context 'when moves pos to end of the file' do
let(:pos) { 0 }
let(:where) { IO::SEEK_END }
it { is_expected.to eq(sample_trace_raw.bytesize) }
end
context 'when moves pos to middle of the file' do
let(:pos) { sample_trace_raw.bytesize / 2 }
let(:where) { IO::SEEK_SET }
it { is_expected.to eq(pos) }
end
context 'when moves pos around' do
it 'matches the result' do
expect(chunked_io.seek(0)).to eq(0)
expect(chunked_io.seek(100, IO::SEEK_CUR)).to eq(100)
expect { chunked_io.seek(sample_trace_raw.bytesize + 1, IO::SEEK_CUR) }
.to raise_error('new position is outside of file')
end
end
end
context "#eof?" do
subject { chunked_io.eof? }
before do
build.trace.set(sample_trace_raw)
end
context 'when current pos is at end of the file' do
before do
chunked_io.seek(sample_trace_raw.bytesize, IO::SEEK_SET)
end
it { is_expected.to be_truthy }
end
context 'when current pos is not at end of the file' do
before do
chunked_io.seek(0, IO::SEEK_SET)
end
it { is_expected.to be_falsey }
end
end
context "#each_line" do
let(:string_io) { StringIO.new(sample_trace_raw) }
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it 'yields lines' do
expect { |b| chunked_io.each_line(&b) }
.to yield_successive_args(*string_io.each_line.to_a)
end
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it 'calls get_chunk only once' do
expect_any_instance_of(Gitlab::Ci::Trace::ChunkedIO)
.to receive(:current_chunk).once.and_call_original
chunked_io.each_line { |line| }
end
end
context 'when buffer consist of many empty lines' do
let(:sample_trace_raw) { Array.new(10, " ").join("\n") }
before do
build.trace.set(sample_trace_raw)
end
it 'yields lines' do
expect { |b| chunked_io.each_line(&b) }
.to yield_successive_args(*string_io.each_line.to_a)
end
end
end
context "#read" do
subject { chunked_io.read(length) }
context 'when read the whole size' do
let(:length) { nil }
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it { is_expected.to eq(sample_trace_raw) }
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it { is_expected.to eq(sample_trace_raw) }
end
end
context 'when chunk is missing data' do
let(:length) { nil }
before do
stub_buffer_size(1024)
build.trace.set(sample_trace_raw)
# make second chunk to not have data
build.trace_chunks.second.append('', 0)
end
it 'raises an error' do
expect { subject }.to raise_error described_class::FailedToGetChunkError
end
end
context 'when read only first 100 bytes' do
let(:length) { 100 }
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to eq(sample_trace_raw.byteslice(0, length))
end
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to eq(sample_trace_raw.byteslice(0, length))
end
end
end
context 'when tries to read oversize' do
let(:length) { sample_trace_raw.bytesize + 1000 }
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to eq(sample_trace_raw)
end
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to eq(sample_trace_raw)
end
end
end
context 'when tries to read 0 bytes' do
let(:length) { 0 }
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to be_empty
end
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it 'reads a trace' do
is_expected.to be_empty
end
end
end
end
context "#readline" do
subject { chunked_io.readline }
let(:string_io) { StringIO.new(sample_trace_raw) }
shared_examples 'all line matching' do
it do
(0...sample_trace_raw.lines.count).each do
expect(chunked_io.readline).to eq(string_io.readline)
end
end
end
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it_behaves_like 'all line matching'
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it_behaves_like 'all line matching'
end
context 'when pos is at middle of the file' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
chunked_io.seek(chunked_io.size / 2)
string_io.seek(string_io.size / 2)
end
it 'reads from pos' do
expect(chunked_io.readline).to eq(string_io.readline)
end
end
context 'when chunk is missing data' do
let(:length) { nil }
before do
build.trace.set(sample_trace_raw)
# make first chunk to have invalid data
build.trace_chunks.first.append('data', 0)
end
it 'raises an error' do
expect { subject }.to raise_error described_class::FailedToGetChunkError
end
end
context 'when utf-8 is being used' do
let(:sample_trace_raw) { sample_trace_raw_utf8.force_encoding(Encoding::BINARY) }
let(:sample_trace_raw_utf8) { "😺\n😺\n😺\n😺" }
before do
stub_buffer_size(3) # the utf-8 character has 4 bytes
build.trace.set(sample_trace_raw_utf8)
end
it 'has known length' do
expect(sample_trace_raw_utf8.bytesize).to eq(4 * 4 + 3 * 1)
expect(sample_trace_raw.bytesize).to eq(4 * 4 + 3 * 1)
expect(chunked_io.size).to eq(4 * 4 + 3 * 1)
end
it_behaves_like 'all line matching'
end
end
context "#write" do
subject { chunked_io.write(data) }
let(:data) { sample_trace_raw }
context 'when data does not exist' do
shared_examples 'writes a trace' do
it do
is_expected.to eq(data.bytesize)
chunked_io.seek(0, IO::SEEK_SET)
expect(chunked_io.read).to eq(data)
end
end
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(data.bytesize / 2)
end
it_behaves_like 'writes a trace'
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(data.bytesize * 2)
end
it_behaves_like 'writes a trace'
end
end
context 'when data already exists' do
let(:exist_data) { 'exist data' }
shared_examples 'appends a trace' do
it do
chunked_io.seek(0, IO::SEEK_END)
is_expected.to eq(data.bytesize)
chunked_io.seek(0, IO::SEEK_SET)
expect(chunked_io.read).to eq(exist_data + data)
end
end
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(exist_data)
end
it_behaves_like 'appends a trace'
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(exist_data)
end
it_behaves_like 'appends a trace'
end
end
end
context "#truncate" do
let(:offset) { 10 }
context 'when data does not exist' do
shared_examples 'truncates a trace' do
it do
chunked_io.truncate(offset)
chunked_io.seek(0, IO::SEEK_SET)
expect(chunked_io.read).to eq(sample_trace_raw.byteslice(0, offset))
end
end
context 'when buffer size is smaller than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize / 2)
build.trace.set(sample_trace_raw)
end
it_behaves_like 'truncates a trace'
end
context 'when buffer size is larger than file size' do
before do
stub_buffer_size(sample_trace_raw.bytesize * 2)
build.trace.set(sample_trace_raw)
end
it_behaves_like 'truncates a trace'
end
end
end
context "#destroy!" do
subject { chunked_io.destroy! }
before do
build.trace.set(sample_trace_raw)
end
it 'deletes' do
expect { subject }.to change { chunked_io.size }
.from(sample_trace_raw.bytesize).to(0)
expect(Ci::BuildTraceChunk.where(build: build).count).to eq(0)
end
end
end