How Do I Mock Initialize And Validate Results

Most of the time you might want to avoid doing so:
- Checking passed arguments can result in fragile tests
- Unit tests should be "black box testing" - check for result and not execution.

For Example you could check if the object was initialized correctly instead.

There are several ways to check if a certain method was called with sepcific arguments:
1. Isolate.Verify.WasCalledWithExactArguments: using Verify will work if the passed arguments are either value-type or has override Equals method that makes sense for your test.

2. Isolate.WhenCalled(() => ..).DoInstead(...): you can use the DoInstead method to run custom verification logic when then method is called

3. Method re-direction: Isolator has a feature that enable the use to redirect method calls from code under test to custom class. You can use that feature to call you method where you can check the parameters passed.