fix: CVMFS_locations might be an empty list

src/DIRAC/WorkloadManagementSystem/Utilities/PilotWrapper.py

@@ -112,7 +112,7 @@ def pilotWrapperScript(
     if envVariables is None:
         envVariables = {}
 
-    if CVMFS_locations is None:
+    if not CVMFS_locations:
         # What is in this location is almost certainly incorrect, especially the pilot.json
         CVMFS_locs = '["file:/cvmfs/dirac.egi.eu/pilot"]'
     else:

src/DIRAC/WorkloadManagementSystem/Utilities/test/Test_PilotWrapper.py

@@ -121,3 +121,18 @@ def test_scriptPilot3_3():
         """locations += ["file:/cvmfs/lhcb.cern.ch/lhcbdirac/pilot","file:/cvmfs/dirac.egi.eu/lhcbdirac/pilot"]"""
         in res
     )
+
+
+def test_scriptPilot3_4():
+    """test script creation"""
+    res = pilotWrapperScript(
+        pilotFilesCompressedEncodedDict={"proxy": "thisIsSomeProxy"},
+        pilotOptions="-c 123 --foo bar -l LHCb -h pippo",
+        envVariables={"someName": "someValue", "someMore": "oneMore"},
+        location="lhcb-portal.cern.ch",
+        CVMFS_locations=[],
+    )
+
+    assert 'os.environ["someName"]="someValue"' in res
+    assert "lhcb-portal.cern.ch" in res
+    assert """locations += ["file:/cvmfs/dirac.egi.eu/pilot"]""" in res