Test with traces enabled.

Author: ioquatix

lib/async/http/client.rb

@@ -161,7 +161,7 @@ def call(request)
 					end
 
 					trace('async.http.client.call', attributes: attributes) do |span|
-						if context = trace_context(span)
+						if context = self.trace_context
 							request.headers['traceparent'] = context.to_s
 							# request.headers['tracestate'] = context.state
 						end

spec/spec_helper.rb

@@ -25,6 +25,8 @@
 
 require 'async/rspec'
 
+ENV['TRACES_BACKEND'] ||= 'traces/backend/test'
+
 RSpec.shared_context 'docstring as description' do
 	let(:description) {self.class.metadata.fetch(:description_args).first}
 end