unit testing - Using Moq to verify in C# -

i'm trying mock database can verify save method called. have project saves database, takes list of objects save, , connection string.

this._database.save<constraint>(constraints, "default"); 

when debug can see test goes project mocked database, , hits save line once.

in test project create instance of class calling save method, create , create mock database, , use .setup save method.

private mock<idatabase> _mockdatabase; ... _mockdatabase = new mock<idatabase>(); _mockdatabase.setup(d => d.save<types.constraint>(it.isany<types.constraint>(), it.isany<string>())); 

then in test method, call .verify make sure save called 1 time.

_mockdatabase.verify(d => d.save<constraint>(it.isany<constraint>(), it.isany<string>()), times.once); 

however test fails on verify. know how can fix this? help/ideas!

moq.mockexception:
expected invocation on mock once, 0 times: d => d.save(it.isany(), it.isany())

configured setups:
d => d.save(it.isany(), it.isany()), times.never

performed invocations:
idatabase.save(system.collections.generic.list`1[types.constraint], "default")

with code, sending list<constraint> , expecting constraint so:

change setup :

_mockdatabase.setup(d => d.save<constraint>(it.isany<list<constraint>>(), it.isany<string>())); 

and verify :

_mockdatabase.verify(d => d.save<constraint>(it.isany<list<constraint>>(), it.isany<string>()), times.once);