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require_relative 'spec_helper'
require_relative '../lib/gitlab_metrics'
describe GitlabMetrics do
describe '.measure' do
it 'returns the return value of the block' do
val = described_class.measure('foo') { 10 }
expect(val).to eq(10)
end
it 'writes the metrics data to a log file' do
expect(described_class.logger).to receive(:debug).
with('metrics', a_metrics_log_message('foo'))
described_class.measure('foo') { 10 }
end
it 'calls proper measure methods' do
expect(described_class::System).to receive(:monotonic_time).twice.and_call_original
expect(described_class::System).to receive(:cpu_time).twice.and_call_original
described_class.measure('foo') { 10 }
end
end
end
RSpec::Matchers.define :a_metrics_log_message do |x|
match do |actual|
[
actual.fetch(:name) == x,
actual.fetch(:wall_time).is_a?(Numeric),
actual.fetch(:cpu_time).is_a?(Numeric),
].all?
end
end
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