old_contents: import instana.http_propagator as ihp
  import opentracing as ot
  from instana import tracer, options, util
  from nose.tools import assert_equals
  import inspect
  
  
  def test_basics():
      inspect.isclass(ihp.HTTPPropagator)
  
      inject_func = getattr(ihp.HTTPPropagator, "inject", None)
      assert inject_func
      assert inspect.ismethod(inject_func)
  
      extract_func = getattr(ihp.HTTPPropagator, "extract", None)
      assert extract_func
      assert inspect.ismethod(extract_func)
  
  
  def test_inject():
      opts = options.Options()
      ot.global_tracer = tracer.InstanaTracer(opts)
  
      carrier = {}
      span = ot.global_tracer.start_span("nosetests")
      ot.global_tracer.inject(span.context, ot.Format.HTTP_HEADERS, carrier)
  
      assert 'X-Instana-T' in carrier
      assert_equals(carrier['X-Instana-T'], util.id_to_header(span.context.trace_id))
      assert 'X-Instana-S' in carrier
      assert_equals(carrier['X-Instana-S'], util.id_to_header(span.context.span_id))
      assert 'X-Instana-L' in carrier
      assert_equals(carrier['X-Instana-L'], "1")
  
new_contents: import instana.http_propagator as ihp
  import opentracing as ot
  from instana import tracer, options, util
  from nose.tools import assert_equals
  import inspect
  
  
  def test_basics():
      inspect.isclass(ihp.HTTPPropagator)
  
      inject_func = getattr(ihp.HTTPPropagator, "inject", None)
      assert inject_func
      assert callable(inject_func)
  
      extract_func = getattr(ihp.HTTPPropagator, "extract", None)
      assert extract_func
      assert callable(extract_func)
  
  
  def test_inject():
      opts = options.Options()
      ot.global_tracer = tracer.InstanaTracer(opts)
  
      carrier = {}
      span = ot.global_tracer.start_span("nosetests")
      ot.global_tracer.inject(span.context, ot.Format.HTTP_HEADERS, carrier)
  
      assert 'X-Instana-T' in carrier
      assert_equals(carrier['X-Instana-T'], util.id_to_header(span.context.trace_id))
      assert 'X-Instana-S' in carrier
      assert_equals(carrier['X-Instana-S'], util.id_to_header(span.context.span_id))
      assert 'X-Instana-L' in carrier
      assert_equals(carrier['X-Instana-L'], "1")
  
subject: Fix function test to work on both Py 2 + 3