prevent new xarray tests from execution in a non-xarray environment

Author: Try2Code

python/test/test_cdo.py

@@ -462,12 +462,16 @@ def test_xarray_input(self):
 
     def test_xarray_input_and_output(self):
       cdo = Cdo()
-      ifile = cdo.setcalendar('360_day', input=' -settaxis,1800-01-01,12:00:00,1months -seq,1,10000',options='-f nc -r')
-      (var,) = cdo.showname(input=ifile)
-      self.assertEqual('seq',var)
-      x = cdo.selyear('1985/2100', input=ifile, returnXArray=var)
-      y = cdo.yearsum(input=x, returnXArray=var)
-      self.assertEqual(4059768.0,float(y[:,0,0].sum()))
+
+      if cdo.hasXarray:
+        ifile = cdo.setcalendar('360_day', input=' -settaxis,1800-01-01,12:00:00,1months -seq,1,10000',options='-f nc -r')
+        (var,) = cdo.showname(input=ifile)
+        self.assertEqual('seq',var)
+        x = cdo.selyear('1985/2100', input=ifile, returnXArray=var)
+        y = cdo.yearsum(input=x, returnXArray=var)
+        self.assertEqual(4059768.0,float(y[:,0,0].sum()))
+      else:
+        print("test_xarray_input_and_output needs xarray")
 
     def test_xarray_output(self):
       cdo = Cdo()