除非强行处理，否则仅显示第一次日志记录 [英] Only first logging shows unless forcefully disposing

问题描述

我正在使用 vs 2017，编写一个 netcoreapp2.0 库，并使用 UnitTest 项目对其进行测试(XUnit 和 NUnit 给出相同的结果).
我注意到除非我强行处理我的 Serilog 记录器，否则只有第一行会以 Seq 结尾.

I'm using vs 2017, writing a netcoreapp2.0 library, and testing it with a UnitTest project (XUnit and NUnit give same results).
I've noticed that unless I'm forcefully Disposing of my Serilog logger, only the first line will end up in Seq.

这是我的 2 节课.图书馆一:

Here are my 2 classes. The library one:

public class Class1
{
    public static Logger _log;

    public Class1(Logger log)
    {
        _log = log;
        _log.Verbose("Class 1 constructor fineshed");
    }

    public void LogMessage(string s)
    {
        _log.Debug("Got message: {Message}", s);
    }
}

和单元测试:

public class UnitTest1
{
    public static Logger _log = new LoggerConfiguration()
                                          .WriteTo.Seq("http://localhost:5341", Serilog.Events.LogEventLevel.Verbose)
                                          .MinimumLevel.Verbose()
                                          .CreateLogger();
    [Fact]
    public void Test1()
    {
        _log.Debug("Test 1 logging");
        var c = new Class1(_log);
        c.LogMessage("Logging from test");

        _log.Information("Test fineshed");

        _log.Dispose(); // Without this, only "Test 1 logging" is logged.
    }
}

引用的程序集(来自单元测试项目):

Referenced assemblies (from unit test project):

<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0-preview-20170628-02" />
<PackageReference Include="serilog" Version="2.5.0" />
<PackageReference Include="serilog.sinks.seq" Version="3.3.3" />
<PackageReference Include="xunit" Version="2.2.0" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />

有什么建议吗?

(这是一个演示项目的链接，打开 vs 2017 恢复包并运行测试:演示项目 )

(here's a link to a demo project, open with vs 2017 restore the packages and run the test : demo project )

推荐答案

根据 Stephen 的建议，问题是记录器的生命范围.

As per Stephen suggestions, the problem was the life scope of the logger.

由于我是从单元测试类进行日志记录，我觉得处理记录器是错误的，但解决方案是从使用类变量记录器更改为使用静态全局记录器.
这允许我在测试创建时设置一次，并在所有测试运行后处理一次:

Since I'm logging from a unit test class, I feel like disposing of the logger was wrong, but the solution was to change from using a class variable logger to using the static global logger.
That allows me to set it up once on test creation, and dispose of it once after all tests run :

[SetUpFixture]
public class TestsSetup
{
    [OneTimeSetUp]
    public void RunBeforeAnyTests()
    {
        Log.Logger = new LoggerConfiguration().Enrich.WithExceptionDetails()
                                              .WriteTo.Seq("http://localhost:5341")
                                              .MinimumLevel.Verbose()
                                              .CreateLogger();
    }

    [OneTimeTearDown]
    public void RunAfterAnyTests()
    {
        Log.CloseAndFlush();
    }
}

我遇到的主要困惑是 CloseAndFlush 存在于静态代码中，但不存在于使用

The main confusion I had was that the CloseAndFlush exists on the static one, but not on the ILogger you get when creating one with

Logger _log = new LoggerConfiguration()....

这就是为什么我无法关闭并刷新我的变量 1.

hence why i wasn't able to close and flush my variable one.

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