Fix datadog exporter

Author: ocelotl

Diff for: exporter/opentelemetry-exporter-datadog/src/opentelemetry/exporter/datadog/propagator.py

@@ -92,19 +92,19 @@ def inject(
         if span_context == trace.INVALID_SPAN_CONTEXT:
             return
         sampled = (trace.TraceFlags.SAMPLED & span.context.trace_flags) != 0
-        setter(
+        setter.set(
             carrier, self.TRACE_ID_KEY, format_trace_id(span.context.trace_id),
         )
-        setter(
+        setter.set(
             carrier, self.PARENT_ID_KEY, format_span_id(span.context.span_id)
         )
-        setter(
+        setter.set(
             carrier,
             self.SAMPLING_PRIORITY_KEY,
             str(constants.AUTO_KEEP if sampled else constants.AUTO_REJECT),
         )
         if constants.DD_ORIGIN in span.context.trace_state:
-            setter(
+            setter.set(
                 carrier,
                 self.ORIGIN_KEY,
                 span.context.trace_state[constants.DD_ORIGIN],

Diff for: exporter/opentelemetry-exporter-datadog/tests/test_datadog_format.py

@@ -113,7 +113,7 @@ def test_context_propagation(self):
 
         child_carrier = {}
         child_context = set_span_in_context(child)
-        FORMAT.inject(dict.__setitem__, child_carrier, context=child_context)
+        FORMAT.inject(child_carrier, context=child_context)
 
         self.assertEqual(
             child_carrier[FORMAT.TRACE_ID_KEY], self.serialized_trace_id
@@ -159,7 +159,7 @@ def test_sampling_priority_auto_reject(self):
 
         child_carrier = {}
         child_context = set_span_in_context(child)
-        FORMAT.inject(dict.__setitem__, child_carrier, context=child_context)
+        FORMAT.inject(child_carrier, context=child_context)
 
         self.assertEqual(
             child_carrier[FORMAT.SAMPLING_PRIORITY_KEY],
@@ -189,7 +189,7 @@ def test_fields(self, mock_get_current_span):
 
         with tracer.start_as_current_span("parent"):
             with tracer.start_as_current_span("child"):
-                FORMAT.inject(mock_setter, {})
+                FORMAT.inject({}, setter=mock_setter)
 
         inject_fields = set()