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require 'spec_helper'
describe Gitlab::Metrics::MethodCall do
let(:method_call) { described_class.new('Foo#bar', 'foo') }
describe '#measure' do
it 'measures the performance of the supplied block' do
method_call.measure { 'foo' }
expect(method_call.real_time).to be_a_kind_of(Numeric)
expect(method_call.cpu_time).to be_a_kind_of(Numeric)
expect(method_call.call_count).to eq(1)
end
end
describe '#to_metric' do
it 'returns a Metric instance' do
method_call.measure { 'foo' }
metric = method_call.to_metric
expect(metric).to be_an_instance_of(Gitlab::Metrics::Metric)
expect(metric.series).to eq('foo')
expect(metric.values[:duration]).to be_a_kind_of(Numeric)
expect(metric.values[:cpu_duration]).to be_a_kind_of(Numeric)
expect(metric.values[:call_count]).to an_instance_of(Integer)
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expect(metric.tags).to eq({ method: 'Foo#bar' })
end
end
describe '#above_threshold?' do
it 'returns false when the total call time is not above the threshold' do
expect(method_call.above_threshold?).to eq(false)
end
it 'returns true when the total call time is above the threshold' do
expect(method_call).to receive(:real_time).and_return(9000)
expect(method_call.above_threshold?).to eq(true)
end
end
describe '#call_count' do
context 'without any method calls' do
it 'returns 0' do
expect(method_call.call_count).to eq(0)
end
end
context 'with method calls' do
it 'returns the number of method calls' do
method_call.measure { 'foo' }
expect(method_call.call_count).to eq(1)
end
end
end
describe '#cpu_time' do
context 'without timings' do
it 'returns 0.0' do
expect(method_call.cpu_time).to eq(0.0)
end
end
context 'with timings' do
it 'returns the total CPU time' do
method_call.measure { 'foo' }
expect(method_call.cpu_time >= 0.0).to be(true)
end
end
end
describe '#real_time' do
context 'without timings' do
it 'returns 0.0' do
expect(method_call.real_time).to eq(0.0)
end
end
context 'with timings' do
it 'returns the total real time' do
method_call.measure { 'foo' }
expect(method_call.real_time >= 0.0).to be(true)
end
end
end
end