vibhatha commented on code in PR #15183:
URL: https://github.com/apache/arrow/pull/15183#discussion_r1062115318


##########
cpp/src/arrow/compute/exec/plan_test.cc:
##########
@@ -344,6 +344,47 @@ void TestSourceSink(
               
Finishes(ResultWith(UnorderedElementsAreArray(exp_batches.batches))));
 }
 
+void TestRecordBatchReaderSourceSink(
+    std::function<Result<std::shared_ptr<RecordBatchReader>>(const 
BatchesWithSchema&)>
+        to_reader) {
+  ASSERT_OK_AND_ASSIGN(auto executor, arrow::internal::ThreadPool::Make(1));
+  ExecContext exec_context(default_memory_pool(), executor.get());
+  ASSERT_OK_AND_ASSIGN(auto plan, ExecPlan::Make(exec_context));
+  AsyncGenerator<std::optional<ExecBatch>> sink_gen;
+
+  auto exp_batches = MakeBasicBatches();
+  ASSERT_OK_AND_ASSIGN(std::shared_ptr<RecordBatchReader> reader, 
to_reader(exp_batches));
+
+  ASSERT_OK(Declaration::Sequence(
+                {
+                    {"record_batch_reader_source",
+                     RecordBatchReaderSourceNodeOptions{exp_batches.schema, 
reader}},
+                    {"sink", SinkNodeOptions{&sink_gen}},
+                })
+                .AddToPlan(plan.get()));
+
+  ASSERT_THAT(StartAndCollect(plan.get(), sink_gen),
+              
Finishes(ResultWith(UnorderedElementsAreArray(exp_batches.batches))));
+}

Review Comment:
   >  If we're only going to have one simple test I would prefer a test using 
the default instead of one specifying a custom executor as that is the more 
common case.
   
   Are you referring to `IOThreadPool` being used as the default instead of 
`NULLPTR`? 



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