如何在 docker 容器中运行 C# 单元测试

Question

我在 docker 容器中运行单元测试时遇到问题。 我正在为自定义类方法创建带有 Nunit 测试的 ApiTests 项目。 测试成功运行。 然后创建使用 ApiTests.dll 的 UnitApiTestsService 项目，如：

var dockerEnvironment = Environment.GetEnvironmentVariable("DOCKER_UNIT_TEST_ENVIRONMENT")=="TRUE" ? true : false;
var info = new ProcessStartInfo
{
    FileName = "dotnet",                       
    Arguments = dockerEnvironment ? "vstest ApiTests.dll" : "vstest ../ApiTests/bin/Debug/netcoreapp2.2/ApiTests.dll",
    UseShellExecute = false,
    RedirectStandardOutput = true
};
_shedulerProcess = Process.Start(info);
var testResults = _shedulerProcess.StandardOutput.ReadToEnd();
_shedulerProcess.WaitForExit();

dockerEnvironment 是真的

由来自 RabbitMQ 的消息运行的服务。 本地（当我在我的 IDE 中运行项目时）都成功地工作，但是当我将 UnitApiTestsService 放入 docker 映像时，启动此映像后，我在 Process.Start(info); 线上遇到了同样的麻烦； 用这段文字：

vstest.console process failed to connect to testhost process after 10000 seconds. This may occur due to machine slowness, please set environment variable VSTEST_CONNECTION_TIMEOUT to increase timeout. Test Run Aborted.

我的 Dockerfile：

#FROM microsoft/dotnet:2.2-sdk AS build-env
FROM mcr.microsoft.com/dotnet/core/sdk:2.2 AS build-env

WORKDIR /app
COPY . .
RUN dotnet publish ./Operations/ApiTests -c Release -o publish
RUN dotnet publish ./Operations/UnitAPITestsService -c Release -o publish

WORKDIR /app/Operations/ApiTests/
RUN dotnet restore .; exit 0;
RUN dotnet build

# Build runtime image
#FROM microsoft/dotnet:2.2-sdk
FROM mcr.microsoft.com/dotnet/core/sdk:2.2
#FROM mcr.microsoft.com/dotnet/core/aspnet:2.2  

WORKDIR /app
COPY --from=build-env /app/Operations/UnitAPITestsService/publish .
ENTRYPOINT ["dotnet", "UnitAPITestsService.dll"]

RUN mkdir -p /opt/
RUN chmod -R 777 /opt/
RUN mkdir -p /opt/download
RUN chmod -R 777 /opt/download
ENV VSTEST_CONNECTION_TIMEOUT 10000
ENV DOCKER_UNIT_TEST_ENVIRONMENT TRUE

当容器工作时，服务成功接收到来自 Rabbit 的消息。 有人可以解决这个麻烦吗？

Answer 1

我解决了这个问题。 需要正确编写docker文件。 在组装第二个图像之前，我构建了两个项目并将发布文件从 build-env publish/ 文件夹复制到第二个图像中的 app/ 。

FROM microsoft/dotnet:2.2-sdk AS build-env

WORKDIR /app
COPY . .
RUN dotnet publish ./Operations/ApiTests -c Release -o publish
RUN dotnet publish ./Operations/UnitAPITestsService -c Release -o publish

WORKDIR /app/Operations/ApiTests/
RUN dotnet restore .; exit 0;
RUN dotnet build

WORKDIR /app/Operations/UnitAPITestsService/
RUN dotnet restore .; exit 0;
RUN dotnet build

FROM mcr.microsoft.com/dotnet/core/sdk:2.2

WORKDIR /app
COPY --from=build-env /app .

COPY --from=build-env /app/Operations/ApiTests/publish .
COPY --from=build-env /app/Operations/UnitAPITestsService/publish .
#WORKDIR /app/Operations/UnitAPITestsService
ENTRYPOINT ["dotnet", "UnitAPITestsService.dll"]

RUN mkdir -p /opt/
RUN chmod -R 777 /opt/
RUN mkdir -p /opt/download
RUN chmod -R 777 /opt/download
ENV VSTEST_CONNECTION_TIMEOUT 90000
ENV DOCKER_UNIT_TEST_ENVIRONMENT TRUE

瞧，一切正常。