Skip test if netcdf module is missing

Author: dnerini

pysteps/tests/test_exporters.py

@@ -7,10 +7,12 @@
 from pysteps.io.exporters import export_forecast_dataset
 from pysteps.io.exporters import close_forecast_files
 
-import pysteps
+import numpy as np
 import os
+import pysteps
+import pytest
 import tempfile
-import numpy as np
+
 
 
 def test_get_geotiff_filename():
@@ -32,6 +34,9 @@ def test_get_geotiff_filename():
 
 def test_io_export_netcdf_one_member_one_time_step():
     """Test the export netcdf."""
+
+    pytest.importorskip('netCDF4')
+
     # open a netcdf file
     root_path = pysteps.rcparams.data_sources["bom"]["root_path"]
     rel_path = os.path.join("prcp-cscn", "2", "2018", "06", "16")