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require 'spec_helper'
RSpec.describe Jaeger::Samplers::Const do
let(:sampler) { described_class.new(decision) }
let(:sample_args) { { trace_id: Jaeger::TraceId.generate } }
let(:sample_result) { sampler.sample(sample_args) }
let(:is_sampled) { sample_result[0] }
let(:tags) { sample_result[1] }
context 'when decision is set to true' do
let(:decision) { true }
it 'sets sampling to always true' do
expect(is_sampled).to eq(true)
end
it 'returns tags with param 1' do
expect(tags).to eq(
'sampler.type' => 'const',
'sampler.param' => 1
)
end
end
context 'when decision is set to false' do
let(:decision) { false }
it 'sets sampling to always false' do
expect(is_sampled).to eq(false)
end
it 'returns tags with param 0' do
expect(tags).to eq(
'sampler.type' => 'const',
'sampler.param' => 0
)
end
end
end
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