public void TestCustomCommand_CanExecute()
{
var fact = Substitute.For <CustomCommandFactory>();
CustomCommand cmd = fact.Create() as CustomCommand;
Assert.IsNotNull(cmd);
object arg1 = null;
bool ret1 = cmd.CanExecute(arg1);
bool expected1 = false;
Assert.IsFalse(ret1);
Assert.AreEqual(expected1, ret1);
object arg2 = new Object();
bool ret2 = cmd.CanExecute(arg2);
bool expected2 = true;
Assert.IsTrue(ret2);
Assert.AreEqual(expected2, ret2);
}