Test 1: Direct array assignment
After ReDim(-1): TypeName=Variant(), IsArray=True
After ReDim(2) and fill: TypeName=Variant(), IsArray=True
  UBound(arr1)=2

Test 2: Array copy by assignment
After arr2Copy = arr1: TypeName=Variant(), IsArray=True
  UBound(arr2Copy)=2

Test 3: Array in class property
From property: TypeName=Variant(), IsArray=True
  UBound=1

Test 4: Array reference semantics
Original arr3(0)=Modified
Should be 'Modified' if pass-by-reference: True