Add functions to unit test framework

Signed-off-by: Emelia Lei <[email protected]>

Author: emelialei88

Diff for: src/groups/bmq/bmqimp/bmqimp_brokersession.t.cpp

@@ -2834,6 +2834,49 @@ class DTTestTracer : public bmqpi::DTTracer {
             d_allocator_p);
         return result;
     }
+
+    int serializeSpan(bsl::vector<unsigned char>*           out,
+                      const bsl::shared_ptr<bmqpi::DTSpan>& dtSpan) const
+        BSLS_KEYWORD_OVERRIDE
+    {
+        bmqu::MemOutStream event(d_allocator_p);
+
+        out->resize(dtSpan->operation().size() + 1);
+        out->insert(out->cbegin(),
+                    dtSpan->operation().cbegin(),
+                    dtSpan->operation().cend());
+
+        event << "SERIALIZE " << dtSpan->operation();
+        d_eventsQueue_p->pushBack(event.str());
+
+        return 0;
+    }
+
+    int deserializeAndCreateChildSpan(
+        bsl::shared_ptr<bmqpi::DTSpan>*   out,
+        const bsl::vector<unsigned char>& in,
+        const bsl::string_view&           operation,
+        const bmqpi::DTSpan::Baggage&     baggage) const BSLS_KEYWORD_OVERRIDE
+    {
+        bsl::string parentOperation(in.begin(), in.end());
+
+        bmqu::MemOutStream event(d_allocator_p);
+        event << "DESERIALIZE " << parentOperation;
+        d_eventsQueue_p->pushBack(event.str());
+
+        bmqu::MemOutStream operationName(d_allocator_p);
+        operationName << operation;
+        operationName << " < " << parentOperation;
+
+        *out = bsl::shared_ptr<bmqpi::DTSpan>(
+            new (*d_allocator_p) DTTestSpan(operationName.str(),
+                                            baggage,
+                                            d_eventsQueue_p,
+                                            d_allocator_p),
+            d_allocator_p);
+
+        return 0;
+    }
 };
 
 }  // close unnamed namespace