Preliminary slog verification suite

[madkins23]

You may remember me from such recent console-slog issues as:

• Don't log the time field if it is zero
• Required

The reason I was familiar with the slog "rules" is that I was working on a verification test suite for slog handlers. I just made it public and tagged it as an alpha pre-release.

It's a lot of (likely over-engineered) code. You may not want to touch it. No big deal, I completely understand. However, if you do I would be interested in any feedback you might have. I've turned on issues and discussions for the repository.

In the meantime, here are the current warnings for phsym/zeroslog:

Warnings for phsym/zeroslog:
  Required
     1 Empty (sub)group(s) logged
       TestGroupWithMultiSubEmpty
         {"level":"info","first":"one","group":{"second":2,"third":"3","subGroup":{}},"time":"2024-01-16T08:44:52-08:00","message":"This is a message"}
     2 Empty attribute(s) logged ("":null)
       TestAttributeWithEmpty
         {"level":"info","":null,"first":"one","pi":3.141592653589793,"time":"2024-01-16T08:44:52-08:00","message":"This is a message"}
       TestAttributesEmpty
         {"level":"info","first":"one","":null,"pi":3.141592653589793,"time":"2024-01-16T08:44:52-08:00","message":"This is a message"}
     1 Group with empty key does not inline subfields
       TestGroupInline
         {"level":"info","first":"one","":{"second":2,"third":"3","fourth":"forth"},"pi":3.141592653589793,"time":"2024-01-16T08:44:52-08:00","message":"This is a message"}
     1 Zero time is logged
       TestZeroTime: 0001-01-01T00:00:00Z
         {"level":"info","time":"0001-01-01T00:00:00Z","message":"This is a message"}
  Implied
     4 HandlerOptions.ReplaceAttr not available
       TestReplaceAttr: too many attributes: 6, alpha == beta, change still exists, remove still exists
       TestReplaceAttrBasic: too many attributes: 4, time field still exists, message field still exists, source == <nil>
       TestReplaceAttrFnLevelCase: level value not null
       TestReplaceAttrFnRemoveTime: time value not empty string
     1 Source data not logged when AddSource flag set
       TestKey: no 'source' key
         {"level":"info","caller":"/snap/go/10489/src/reflect/value.go:596","time":"2024-01-16T08:44:52-08:00","message":"This is a message"}
     6 Wrong message key (should be 'msg')
       TestCancelledContext: `message`
       TestCancelledContext: `message`
       TestKey: `message`
       TestKeys: `message`
       TestZeroPC: `message`
       TestZeroTime: `message`
  Suggested
     2 Duplicate field(s) found
       TestAttributeDuplicate: map[alpha:2 charlie:3]
       TestAttributeWithDuplicate: map[alpha:2 charlie:3]
    10 Log level in lowercase
       TestCancelledContext: 'info'
       TestCancelledContext: 'info'
       TestKey: 'info'
       TestKeyCase: 'debug'
       TestKeyCase: 'info'
       TestKeyCase: 'warn'
       TestKeyCase: 'error'
       TestKeys: 'info'
       TestZeroPC: 'info'
       TestZeroTime: 'info'
     1 slog.Duration() logs milliseconds instead of nanoseconds
       TestLogAttributes
     1 slog.Time() logs milliseconds instead of nanoseconds
       TestLogAttributes: 2024-01-16T08:44:52-08:00

Not all of the warnings are important. Specifics of various warnings documented here. I'm not suggesting that you fix anything in particular, I just figured you might be interested in what I've done. For that matter, in the fullness of time I might submit some pull requests for specific simple fixes.

BTW: I also referenced this project in my documentation. Let me know if that is bad.