made test independent of cds

tests/conftest.py

@@ -7,6 +7,8 @@
 import pytest
 import dfm_tools as dfmt
 import os
+import xarray as xr
+import pandas as pd
 
 
 @pytest.mark.requiressecrets
@@ -25,3 +27,13 @@ def file_nc_era5_pattern(tmp_path):
     # assert downloaded files
     file_nc_era5_pattern = os.path.join(tmp_path, "*.nc")
     return file_nc_era5_pattern
+
+
+@pytest.fixture
+def ds_era5_empty():
+    # create dummy dataset
+    ds_era5_empty = xr.Dataset()
+    ds_era5_empty['longitude'] = xr.DataArray()
+    time_data = pd.date_range('2010-01-31', '2010-02-01', freq="3h")
+    ds_era5_empty['time'] = xr.DataArray(time_data, dims='time')
+    return ds_era5_empty

tests/test_modelbuilder.py

@@ -186,18 +186,18 @@ def test_make_paths_relative(tmp_path):
 
 
 @pytest.mark.unittest
-@pytest.mark.requiressecrets
-@pytest.mark.timeout(60) # useful since CDS downloads are terribly slow sometimes, so skip in that case
-def test_preprocess_merge_meteofiles_era5_unsupported_varlist(file_nc_era5_pattern, tmp_path):
+def test_preprocess_merge_meteofiles_era5_unsupported_varlist(tmp_path, ds_era5_empty):
+    file_nc = os.path.join(tmp_path,"era5_msl_empty.nc")
+    ds_era5_empty.to_netcdf(file_nc)
+
     ext_old = None # this won't be reached, so not relevant what to supply
-    date_min = '2010-01-31'
-    date_max = '2010-02-01'
+    date_min = ds_era5_empty.time.to_pandas().iloc[0]
+    date_max = ds_era5_empty.time.to_pandas().iloc[-1]
     varlist_list = ['msl']
-    dir_output_data_era5 = os.path.dirname(file_nc_era5_pattern)
     with pytest.raises(KeyError) as e:
         ext_old = dfmt.preprocess_merge_meteofiles_era5(ext_old=ext_old,
                                                         varkey_list=varlist_list,
-                                                        dir_data=dir_output_data_era5,
+                                                        dir_data=tmp_path,
                                                         dir_output=tmp_path,
                                                         time_slice=slice(date_min, date_max))
     assert "is not supported by dfmt.preprocess_merge_meteofiles_era5" in str(e.value)