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require 'spec_helper'
describe Gitlab::Ci::TraceReader do
let(:path) { __FILE__ }
let(:lines) { File.readlines(path) }
let(:bytesize) { lines.sum(&:bytesize) }
it 'returns last few lines' do
10.times do
subject = build_subject
last_lines = random_lines
expected = lines.last(last_lines).join
expect(subject.read(last_lines: last_lines)).to eq(expected)
end
end
it 'returns everything if trying to get too many lines' do
expect(build_subject.read(last_lines: lines.size * 2)).to eq(lines.join)
end
it 'raises an error if not passing an integer for last_lines' do
expect do
build_subject.read(last_lines: lines)
end.to raise_error(ArgumentError)
end
def random_lines
Random.rand(lines.size) + 1
end
def random_buffer
Random.rand(bytesize) + 1
end
def build_subject
described_class.new(__FILE__, buffer_size: random_buffer)
end
end
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