[NF] Add unit checking test case for empty when.

Author: perost

testsuite/simulation/modelica/NFunitcheck/Makefile

@@ -18,7 +18,8 @@ UnitCheck14.mos \
 UnitCheck15.mos \
 UnitCheck16.mos \
 UnitCheck17.mos \
-Unitcheck18.mos \
+UnitCheck18.mos \
+UnitCheck19.mos \
 ticket3631.mos \
 
 

testsuite/simulation/modelica/NFunitcheck/Unitcheck18.mos renamed to testsuite/simulation/modelica/NFunitcheck/UnitCheck18.mos

@@ -0,0 +1,33 @@
+// name: UnitCheck19
+// keywords: initialization
+// status: correct
+
+
+loadString("
+model UnitCheck19
+  equation
+    when time > 0 then
+    end when;
+end UnitCheck19;
+"); getErrorString();
+
+setCommandLineOptions("-d=frontEndUnitCheck,dumpUnits,newInst");
+getErrorString();
+instantiateModel(UnitCheck19);
+getErrorString();
+
+// Result:
+// true
+// ""
+// true
+// ""
+// HashTable:
+// ######## UnitCheck COMPLETED ########
+// "class UnitCheck19
+// equation
+//   when time > 0.0 then
+//   end when;
+// end UnitCheck19;
+// "
+// ""
+// endResult