add test to ensure that normal path is taken by default

qcodes/dataset/data_set.py

@@ -1462,8 +1462,8 @@ def _export_as_netcdf(self, path: Path, file_name: str) -> Path:
         """Export data as netcdf to a given path with file prefix"""
         import xarray as xr
 
+        file_path = path / file_name
         if self._estimate_ds_size() > self._export_limit:
-            file_path = path / file_name
             log.info(
                 "Dataset is expected to be larger that threshold. Using distributed export.",
                 extra={
@@ -1517,6 +1517,11 @@ def _export_as_netcdf(self, path: Path, file_name: str) -> Path:
                 finally:
                     data.close()
         else:
+            log.info(
+                "Writing netcdf file directly.",
+                extra={"file_name": file_path},
+            )
+
             file_path = super()._export_as_netcdf(path=path, file_name=file_name)
         return file_path
 

qcodes/dataset/exporters/export_to_xarray.py

@@ -256,7 +256,7 @@ def xarray_to_h5netcdf_with_complex_numbers(
         if not compute and maybe_write_job is not None:
             with TqdmCallback(desc="Combining files"):
                 _LOG.info(
-                    "Writing netcdf file using Dask delayed writer",
+                    "Writing netcdf file using Dask delayed writer.",
                     extra={"file_name": file_path},
                 )
                 maybe_write_job.compute()

qcodes/tests/dataset/test_dataset_export.py

@@ -714,7 +714,20 @@ def test_export_2d_dataset(
     assert xr_ds.identical(xr_ds_reimported)
 
 
-def test_export_numpy_dataset(
+def test_export_dataset_small_no_delated(
+    tmp_path_factory: TempPathFactory, mock_dataset_numpy: DataSet, caplog
+) -> None:
+    """
+    Test that a 'small' dataset does not use the delayed export.
+    """
+    tmp_path = tmp_path_factory.mktemp("export_netcdf")
+    with caplog.at_level(logging.INFO):
+        mock_dataset_numpy.export(export_type="netcdf", path=tmp_path, prefix="qcodes_")
+
+    assert "Writing netcdf file directly" in caplog.records[0].msg
+
+
+def test_export_dataset_delayed(
     tmp_path_factory: TempPathFactory, mock_dataset_numpy: DataSet, caplog
 ) -> None:
     tmp_path = tmp_path_factory.mktemp("export_netcdf")
@@ -747,7 +760,7 @@ def test_export_numpy_dataset(
     _assert_xarray_metadata_is_as_expected(loaded_ds, mock_dataset_numpy)
 
 
-def test_export_numpy_dataset_complex(
+def test_export_dataset_delayed_complex(
     tmp_path_factory: TempPathFactory, mock_dataset_numpy_complex: DataSet, caplog
 ) -> None:
     tmp_path = tmp_path_factory.mktemp("export_netcdf")