Add new tests

[dmitrysulman]

Closes #2

[codecov]

Codecov Report

Attention: Patch coverage is 78.46154% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...sulman/logback/access/reactor/netty/AccessEvent.kt	75.51%	1 Missing and 11 partials ⚠️
.../access/reactor/netty/ReactorNettyServerAdapter.kt	85.71%	0 Missing and 2 partials ⚠️

Files with missing lines	Coverage Δ	Complexity Δ
...rysulman/logback/access/reactor/netty/AccessLog.kt	100.00% <100.00%> (ø)	4.00 <0.00> (ø)
...ysulman/logback/access/reactor/netty/Extensions.kt	100.00% <100.00%> (ø)	0.00 <0.00> (?)
.../access/reactor/netty/ReactorNettyServerAdapter.kt	84.21% <85.71%> (+14.21%)	21.00 <18.00> (+13.00)
...sulman/logback/access/reactor/netty/AccessEvent.kt	87.32% <75.51%> (+12.32%)	113.00 <32.00> (+45.00)

... and 1 file with indirect coverage changes

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