added ILoggerTests to ensure NSubstitute can be used to test specific ILogger calls happened.

[zlangner]

#634 talks about wanting to use NSubstitute to validate a call into Microsoft.Extensions.Logging.ILogger. I have the same need and found that the new Arg.AnyType is insufficient to solving this problem.

So I've added a new test class that shows a number of scenarios using LoggerExtensions extension methods from Microsoft.Extensions.Logging.ILogger. The tests include:

• verify any log message with the same LogLevel happened
• verify a log message with the same LogLevel and message template happened
• verify a log message with the same LogLevel, message template, and parameters happened

As you'll see, I had to change how TypesAreAllEquivalent works to handle the Func<TState, Exception?, string> used by ILogger.

[dtchepak]

Thanks a lot @zlangner ! I'll have a good look at this as soon as I get a chance.

@icalvo not sure if this example helps give ideas for the AnyType changes you're looking at?

[icalvo]

@icalvo not sure if this example helps give ideas for the AnyType changes you're looking at?

I don't think so but it's very good since this was the original use case so it's really nice to have this fixed and the test suite as well.

[dtchepak]

Thanks @zlangner ! Also thanks @Saibamen for the review 👍