add unit test for VarParsing list default

Author: IzaakWN

FWCore/ParameterSet/test/BuildFile.xml

@@ -15,3 +15,5 @@
 
 <test name="testFWCoreParameterSetEdmConfigDump" command="run_edmConfigDump.sh"/>
 <test name="testFWCoreParameterSetEdmConfigSplit" command="run_edmConfigSplit.sh"/>
+
+<test name="TestFWCoreParameterSetVarParsingList" command="python3 ${LOCALTOP}/src/FWCore/ParameterSet/test/test_varparsing_list.py"/>

FWCore/ParameterSet/test/test_varparsing_list.py

@@ -0,0 +1,26 @@
+import sys
+from FWCore.ParameterSet.VarParsing import VarParsing
+
+def parse(argv):
+  sys.argv = ['test.py','maxEvents=100']+argv # emulate user arguments
+  opts = VarParsing('standard')
+  def add(n, d, m, t):
+    opts.register(n, d, m, t)
+  add('myInts0',   '',      VarParsing.multiplicity.list, VarParsing.varType.int)
+  add('myInts1',   0,       VarParsing.multiplicity.list, VarParsing.varType.int)
+  add('myInts2',   [0],     VarParsing.multiplicity.list, VarParsing.varType.int)
+  add('myFloats0', '',      VarParsing.multiplicity.list, VarParsing.varType.float)
+  add('myFloats1', 0,       VarParsing.multiplicity.list, VarParsing.varType.float)
+  add('myFloats2', [0],     VarParsing.multiplicity.list, VarParsing.varType.float)
+  add('myBools0',  '',      VarParsing.multiplicity.list, VarParsing.varType.bool)
+  add('myBools1',  True,    VarParsing.multiplicity.list, VarParsing.varType.bool)
+  add('myBools2',  [True],  VarParsing.multiplicity.list, VarParsing.varType.bool)
+  add('myStrs0',   '',      VarParsing.multiplicity.list, VarParsing.varType.string)
+  add('myStrs1',   'foo',   VarParsing.multiplicity.list, VarParsing.varType.string)
+  add('myStrs2',   ['foo'], VarParsing.multiplicity.list, VarParsing.varType.string)
+
+# parse without user arguments
+parse([ ])
+
+# parse with user arguments
+parse(['myInts1=0,1','myBools1=True,False','myStrs1=foo,bar','myStrs2=foo,bar'])