Associated with EntityFrameworkCore

All db providers (including mock by default) are lazy loaded, so don`t worry about performance.

You can use this features both with HubUnitTestsWithEF and HubUnitTestsWithEF<T, TDbContext>

DbContextMock

 //By default, pure TDbContext mock, without any setup.
 public Mock<TDbContext> DbContextMock;

Why this mock can be usefull?

For example we have Hub which is dependend from DbContext. However We testing method which not use that DbContext. So better not initialize entire in memory database (remember, My In memory databases are lazy loaded) when we dont need it and instead use mock (which is also lazy loaded).

DbInMemorySqlite

DbInMemorySqlite is normal DbContext (But with in Sqlite in memory provider), and you should use it as normal DbContext.

 //Relational database in memory. 
 //During instance creation it ensure if db is created.
 //https://docs.microsoft.com/pl-pl/ef/core/miscellaneous/testing/sqlite
 public TDbContext DbInMemorySqlite;

DbInMemory

DbInMemory is normal DbContext (But with in memory provider), and you should use it as normal DbContext.

 //Database in memory (not really relational). 
 //During instance creation it ensure if db is created.
 //https://docs.microsoft.com/pl-pl/ef/core/miscellaneous/testing/in-memory
 public TDbContext DbInMemory;