niyue commented on a change in pull request #11486:
URL: https://github.com/apache/arrow/pull/11486#discussion_r740214639
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File path: cpp/src/arrow/ipc/read_write_test.cc
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@@ -925,6 +926,64 @@ TEST_F(RecursionLimits, StressLimit) {
}
#endif // !defined(_WIN32) || defined(NDEBUG)
+struct MockFileWriterHelper {
+ MockFileWriterHelper(const std::string& file_name) : file_name_(file_name) {}
+
+ Status Init(const std::shared_ptr<Schema>& schema, const IpcWriteOptions&
options,
+ const std::shared_ptr<const KeyValueMetadata>& metadata =
nullptr) {
+ num_batches_written_ = 0;
+
+ mock_fs_ = std::make_shared<fs::internal::MockFileSystem>(fs::kNoTime);
+ RETURN_NOT_OK(mock_fs_->CreateFile(file_name_, ""));
+ ARROW_ASSIGN_OR_RAISE(sink_, mock_fs_->OpenOutputStream(file_name_));
+ ARROW_ASSIGN_OR_RAISE(writer_,
+ MakeFileWriter(sink_.get(), schema, options,
metadata));
+ return Status::OK();
+ }
+
+ Status WriteBatch(const std::shared_ptr<RecordBatch>& batch) {
+ RETURN_NOT_OK(writer_->WriteRecordBatch(*batch));
+ num_batches_written_++;
+ return Status::OK();
+ }
+
+ Status Finish(WriteStats* out_stats = nullptr) {
+ RETURN_NOT_OK(writer_->Close());
+ if (out_stats) {
+ *out_stats = writer_->stats();
+ }
+ RETURN_NOT_OK(sink_->Close());
+ return Status::OK();
+ }
+
+ Status ReadBatches(const IpcReadOptions& options, RecordBatchVector*
out_batches,
+ ReadStats* out_stats = nullptr,
+ std::vector<io::ReadRange>* io_stats = nullptr) {
+ ARROW_ASSIGN_OR_RAISE(auto ipc_file, mock_fs_->OpenInputFile(file_name_));
+ ARROW_ASSIGN_OR_RAISE(auto reader, RecordBatchFileReader::Open(ipc_file,
options));
+
+ EXPECT_EQ(num_batches_written_, reader->num_record_batches());
+ for (int i = 0; i < num_batches_written_; ++i) {
+ ARROW_ASSIGN_OR_RAISE(std::shared_ptr<RecordBatch> chunk,
+ reader->ReadRecordBatch(i));
+ out_batches->push_back(chunk);
+ }
+ if (out_stats) {
+ *out_stats = reader->stats();
+ }
+ if (io_stats) {
+ ARROW_ASSIGN_OR_RAISE(*io_stats, mock_fs_->GetRecordedReads(ipc_file));
Review comment:
mock file system is used for writing record batch, reading the batch,
and retrieving the recorded read IOs for unit testing.
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