使用 Nunit 3 Console Runner 进行 Specflow 测试

Question

我最近开始了一个新项目并决定使用 Specflow 2.1 它随 NUnit3 一起提供。

目前该项目已设置并且 Visual studio 中的测试运行ner 正在正确执行但是当我尝试运行来自 Nunit 3 控制台的相同测试时运行我收到一个错误。

我使用的命令是 nunit3-console.exe --labels=All --framework=net-4.5 Blah.Testing.Specflow.dll

我添加了两个具有相同程序集的本机 Nunit 测试并且执行良好，它是一个失败的 specflow 测试

NUnit Console Runner 3.2.1
Copyright (C) 2016 Charlie Poole

Runtime Environment
   OS Version: Microsoft Windows NT 10.0.10586.0
  CLR Version: 4.0.30319.42000

Test Files
    Blah.Testing.Specflow.dll

=> Blah.Testing.Specflow.MyTest.TestOne
=> Blah.Testing.Specflow.MyTest.TestTwo
=> Blah.Testing.Specflow.MyTestFeature.AddTwoNumbers

Errors and Failures

1) TearDown Error : Blah.Testing.Specflow.MyTestFeature
System.ArgumentNullException : Value cannot be null.
Parameter name: instance
TearDown : System.NullReferenceException : Object reference not set to an instance of an object.
   at BoDi.ObjectContainer.RegisterInstanceAs(Object instance, Type interfaceType, String name, Boolean dispose)
   at TechTalk.SpecRun.SpecFlowPlugin.Runtime.SpecRunTestRunnerManager.CreateTestRunnerInstance() in c:\TeamCity\BuildAgent\work5a3e4d646c0875\SpecFlowPlugins\TechTalk.SpecRun.SpecFlowPlugin.2-0-0\Runtime\SpecRunTestRunnerManager.cs:line 33
   at TechTalk.SpecFlow.TestRunnerManager.CreateTestRunner(Int32 threadId)
   at TechTalk.SpecFlow.TestRunnerManager.GetTestRunner(Int32 threadId)
   at TechTalk.SpecFlow.TestRunnerManager.GetTestRunner(Assembly testAssembly, Nullable`1 managedThreadId)
   at Blah.Testing.Specflow.MyTestFeature.FeatureSetup() in D:\Projects\Blah\src\Testing\Blah.Testing.Specflow\MyTest.feature.cs:line 0
--TearDown
   at Blah.Testing.Specflow.MyTestFeature.FeatureTearDown() in D:\Projects\Blah\src\Testing\Blah.Testing.Specflow\MyTest.feature.cs:line 0

2) Error : Blah.Testing.Specflow.MyTestFeature.AddTwoNumbers
OneTimeSetUp: System.ArgumentNullException : Value cannot be null.
Parameter name: instance

Run Settings
    RuntimeFramework: net-4.5
    WorkDirectory: D:\Projects\Blah\src\Testing\Blah.Testing.Specflow\bin\Dev
    ImageRuntimeVersion: 4.0.30319
    ImageTargetFrameworkName: .NETFramework,Version=v4.5.1
    ImageRequiresX86: False
    ImageRequiresDefaultAppDomainAssemblyResolver: False
    NumberOfTestWorkers: 8

Test Run Summary
  Overall result: Failed
  Test Count: 3, Passed: 2, Failed: 1, Inconclusive: 0, Skipped: 0
    Failed Tests - Failures: 0, Errors: 1, Invalid: 0
  Start time: 2016-05-16 00:52:52Z
    End time: 2016-05-16 00:52:53Z
    Duration: 0.380 seconds

Results (nunit3) saved as TestResult.xml

我尝试反映 TechTalk.Specflow 程序集去查看 CreateTestRunnerInstance 方法，但是没有找到任何有用的信息来指导我找到解决方案。

生成的步骤文件代码为

// ------------------------------------------------------------------------------
//  <auto-generated>
//      This code was generated by SpecFlow (http://www.specflow.org/).
//      SpecFlow Version:2.1.0.0
//      SpecFlow Generator Version:2.0.0.0
// 
//      Changes to this file may cause incorrect behavior and will be lost if
//      the code is regenerated.
//  </auto-generated>
// ------------------------------------------------------------------------------
#region Designer generated code
#pragma warning disable
namespace Blah.Testing.Specflow
{
    using TechTalk.SpecFlow;


    [System.CodeDom.Compiler.GeneratedCodeAttribute("TechTalk.SpecFlow", "2.1.0.0")]
    [System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
    [NUnit.Framework.TestFixtureAttribute()]
    [NUnit.Framework.DescriptionAttribute("MyTest")]
    public partial class MyTestFeature
    {

        private TechTalk.SpecFlow.ITestRunner testRunner;

#line 1 "MyTest.feature"
#line hidden

        [NUnit.Framework.TestFixtureSetUpAttribute()]
        public virtual void FeatureSetup()
        {
            testRunner = TechTalk.SpecFlow.TestRunnerManager.GetTestRunner();
            TechTalk.SpecFlow.FeatureInfo featureInfo = new TechTalk.SpecFlow.FeatureInfo(new System.Globalization.CultureInfo("en-US"), "MyTest", "\tIn order to avoid silly mistakes\r\n\tAs a math idiot\r\n\tI want to be told the sum o" +
                    "f two numbers", ProgrammingLanguage.CSharp, ((string[])(null)));
            testRunner.OnFeatureStart(featureInfo);
        }

        [NUnit.Framework.TestFixtureTearDownAttribute()]
        public virtual void FeatureTearDown()
        {
            testRunner.OnFeatureEnd();
            testRunner = null;
        }

        [NUnit.Framework.SetUpAttribute()]
        public virtual void TestInitialize()
        {
        }

        [NUnit.Framework.TearDownAttribute()]
        public virtual void ScenarioTearDown()
        {
            testRunner.OnScenarioEnd();
        }

        public virtual void ScenarioSetup(TechTalk.SpecFlow.ScenarioInfo scenarioInfo)
        {
            testRunner.OnScenarioStart(scenarioInfo);
        }

        public virtual void ScenarioCleanup()
        {
            testRunner.CollectScenarioErrors();
        }

        [NUnit.Framework.TestAttribute()]
        [NUnit.Framework.DescriptionAttribute("Add two numbers")]
        [NUnit.Framework.CategoryAttribute("mytag")]
        public virtual void AddTwoNumbers()
        {
            TechTalk.SpecFlow.ScenarioInfo scenarioInfo = new TechTalk.SpecFlow.ScenarioInfo("Add two numbers", new string[] {
                        "mytag"});
#line 7
this.ScenarioSetup(scenarioInfo);
#line 8
 testRunner.Given("I am on the homepage", ((string)(null)), ((TechTalk.SpecFlow.Table)(null)), "Given ");
#line 9
testRunner.Then("I set the Implicit Wait to \"5000\"ms", ((string)(null)), ((TechTalk.SpecFlow.Table)(null)), "Then ");
#line 10
testRunner.Then("I take a screenshot called \"\"", ((string)(null)), ((TechTalk.SpecFlow.Table)(null)), "Then ");
#line hidden
            this.ScenarioCleanup();
        }
    }
}
#pragma warning restore
#endregion

任何帮助将不胜感激

Answer 1

看起来，您还配置了 SpecFlow+Runner (SpecRun) 插件。

在 TechTalk.SpecRun.SpecFlowPlugin.Runtime.SpecRunTestRunnerManager.CreateTestRunnerInstance() 在 c:\TeamCity\BuildAgent\work5a3e4d646c0875\SpecFlowPlugins\TechTalk.SpecRun.SpecFlowPlugin.2-0-0\Runtime\SpecRunTestRunnerManager。 CS:第 33 行

请检查 app.config 中的插件和 unittestprovider 设置。之后，重新生成所有feature- code- behind文件（简单保存feature-文件）。

使用 Nunit 3 Console Runner 进行 Specflow 测试

Specflow Tests with Nunit 3 Console Runner

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