[WIP] Failing test for #142

[tsimbalar]

Trying to figure out the bug #142 by adding a failing test.

Given a sink configuration method like :

public static LoggerConfiguration DummyWithConfiguration(
	this LoggerSinkConfiguration loggerSinkConfiguration,
	IConfiguration appConfiguration,
	IConfigurationSection configurationSection,
	string pathFormat,
	LogEventLevel restrictedToMinimumLevel = LevelAlias.Minimum)
{
	return loggerSinkConfiguration.Sink(new DummyConfigurationSink(appConfiguration, configurationSection), restrictedToMinimumLevel);
}

This test fails (at the first assertion) :

[Fact]
public void SinkWithIConfigurationArguments()
{
	var json = @"{
		""Serilog"": {            
			""Using"": [""TestDummies""],
			""WriteTo"": [{
				""Name"": ""DummyWithConfiguration"",
				""Args"": {""pathFormat"" : ""C:\\"",
						   ""configurationSection"" : { ""foo"" : ""bar"" } }
			}]        
		}
	}";

	// IConfiguration and IConfigurationSection arguments do not have
	// default values so they will throw if they are not populated


	DummyConfigurationSink.Reset();
	var log = ConfigFromJson(json)
		.CreateLogger();


	log.Write(Some.InformationEvent());

	Assert.NotNull(DummyConfigurationSink.Configuration);
	Assert.NotNull(DummyConfigurationSink.ConfigSection);
	Assert.Equal("bar", DummyConfigurationSink.ConfigSection["foo"]);
}

First I want to be sure that this test should pass, and I understand how the IConfiguration/IConfigurationSection support works.

@MV10 if you come by, do you agree with me that such a test should pass ? Thanks !

[tsimbalar]

Closing this PR in favor of #144 that provides fixes for both #142 and #143