首先是一个演示项目的链接,该项目展示了手头的问题:
https://github.com/dsidirop/MTestStructureMapIssue.git
简而言之,当测试从 Visual Studio 中运行时,一切都很好。如果我们尝试使用 MTest.exe 运行相同的测试,如下所示:
"C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\MsTest.exe" /nologo "/testcontainer:MTestStructureMapIssue.Tests.dll"
然后我们在测试类“DummyTest”的构造函数中得到以下错误:
StructureMap.StructureMapConfigurationException: No default Instance is registered and cannot be automatically determined for type 'MTestStructureMapIssue.Dummy.Contracts.ISomeDbContext'
There is no configuration specified for MTestStructureMapIssue.Dummy.Contracts.ISomeDbContext
1.) Container.GetInstance<MTestStructureMapIssue.Dummy.Contracts.ISomeDbContext>()
at StructureMap.SessionCache.GetDefault(Type pluginType, IPipelineGraph pipelineGraph)
at StructureMap.Container.GetInstance[T]()
at MTestStructureMapIssue.Tests.DummyTest..ctor() in C:\VS\MTestStructureMapIssue\Code\MTestStructureMapIssue.Tests\DummyTest.cs:line 23.
此错误消息背后的罪魁祸首似乎是 MSTest.exe 出于某种原因禁止某些 dll 被扫描,因为尽管我们确实使用了该属性,但它甚至没有将它们复制到“测试文件夹”:
[DeploymentItem(@"MTestStructureMapIssue.Dummy.dll")]
如何优雅地克服这一点?