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require 'spec_helper'
describe Jaeger::Injectors::B3RackCodec do
let(:inject) { described_class.inject(span_context, carrier) }
let(:span_context) { build_span_context }
let(:carrier) { {} }
it 'sets trace information' do
inject
expect(carrier['x-b3-traceid']).to eq(span_context.trace_id.to_s(16).rjust(16, '0'))
expect(carrier['x-b3-spanid']).to eq(span_context.span_id.to_s(16).rjust(16, '0'))
expect(carrier['x-b3-parentspanid']).to eq(span_context.parent_id.to_s(16).rjust(16, '0'))
expect(carrier['x-b3-sampled']).to eq(span_context.flags.to_s(16))
end
context 'when sampler flag is DEBUG' do
let(:span_context) do
Jaeger::SpanContext.new(
span_id: Jaeger::TraceId.generate,
trace_id: Jaeger::TraceId.generate,
flags: 0x02
)
end
it 'sets the x-b3-flags header' do
inject
expect(carrier).to have_key 'x-b3-flags'
expect(carrier['x-b3-flags']).to eq '1'
end
it 'does not set the x-b3-sampled header' do
inject
expect(carrier).not_to have_key 'x-b3-sampled'
end
end
context 'when span context IDs are longer than 16 characters' do
let(:span_context) do
Jaeger::SpanContext.new(
span_id: 0xFFFFFFFFFFFFFFFFF,
parent_id: 0xFFFFFFFFFFFFFFFFF,
trace_id: 0xFFFFFFFFFFFFFFFFF,
flags: 0
)
end
it 'pads the hex id strings to 32 characters' do
inject
expect(carrier['x-b3-traceid'].length).to eq 32
expect(carrier['x-b3-spanid'].length).to eq 32
expect(carrier['x-b3-parentspanid'].length).to eq 32
end
end
end
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