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Custom SpecFlow TestGeneratorProvider registration throws a NullReferenceException when generating tests

I am trying to add a CodedUI test generator generator plugin in SpecFlow 1.9. I am trying to use the new plugin registration, because the old registration type causes all the problems in our solution, because we prefer not to put the custom generator provider in the Specflow installation directory (which is different on each development machine).

I started by adding the new Specflow.CustomPlugin NuGet package to the .NET 4.0 class library.

Based on the CodedUI generator samples, I put them together:

using TechTalk.SpecFlow.Infrastructure;
[assembly: GeneratorPlugin(typeof(CodedUIGeneratorProvider.Generator.SpecFlowPlugin.CodedUIGeneratorPlugin))]

namespace CodedUIGeneratorProvider.Generator.SpecFlowPlugin
{
    using System.CodeDom;

    using BoDi;

    using TechTalk.SpecFlow.Generator;
    using TechTalk.SpecFlow.Generator.Configuration;
    using TechTalk.SpecFlow.Generator.Plugins;
    using TechTalk.SpecFlow.Generator.UnitTestProvider;
    using TechTalk.SpecFlow.UnitTestProvider;
    using TechTalk.SpecFlow.Utils;

    /// <summary>
    /// The CodedUI generator plugin.
    /// </summary>
    public class CodedUIGeneratorPlugin : IGeneratorPlugin
    {
        /// <summary>
        /// The register dependencies.
        /// </summary>
        /// <param name="container">
        /// The container.
        /// </param>
        public void RegisterDependencies(ObjectContainer container)
        {
        }

        /// <summary>
        /// The register customizations.
        /// </summary>
        /// <param name="container">
        /// The container.
        /// </param>
        /// <param name="generatorConfiguration">
        /// The generator configuration.
        /// </param>
        public void RegisterCustomizations(ObjectContainer container, SpecFlowProjectConfiguration generatorConfiguration)
        {
            container.RegisterTypeAs<CodedUIGeneratorProvider, IUnitTestGeneratorProvider>("default");
            container.RegisterTypeAs<MsTest2010RuntimeProvider, IUnitTestRuntimeProvider>("default");
        }

        /// <summary>
        /// The register configuration defaults.
        /// </summary>
        /// <param name="specFlowConfiguration">
        /// The spec flow configuration.
        /// </param>
        public void RegisterConfigurationDefaults(SpecFlowProjectConfiguration specFlowConfiguration)
        {
        }
    }

    /// <summary>
    /// The CodedUI generator.
    /// </summary>
    public class CodedUIGeneratorProvider : MsTest2010GeneratorProvider
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="CodedUiGeneratorProvider"/> class.
        /// </summary>
        /// <param name="codeDomHelper">
        /// The code dom helper.
        /// </param>
        public CodedUIGeneratorProvider(CodeDomHelper codeDomHelper)
            : base(codeDomHelper)
        {
        }

        /// <summary>
        /// The set test class.
        /// </summary>
        /// <param name="generationContext">
        /// The generation context.
        /// </param>
        /// <param name="featureTitle">
        /// The feature title.
        /// </param>
        /// <param name="featureDescription">
        /// The feature description.
        /// </param>
        public override void SetTestClass(TestClassGenerationContext generationContext, string featureTitle, string featureDescription)
        {
            base.SetTestClass(generationContext, featureTitle, featureDescription);

            foreach (CodeAttributeDeclaration declaration in generationContext.TestClass.CustomAttributes)
            {
                if (declaration.Name == "Microsoft.VisualStudio.TestTools.UnitTesting.TestClassAttribute")
                {
                    generationContext.TestClass.CustomAttributes.Remove(declaration);
                    break;
                }
            }

            generationContext.TestClass.CustomAttributes.Add(new CodeAttributeDeclaration(new CodeTypeReference("Microsoft.VisualStudio.TestTools.UITesting.CodedUITestAttribute")));
        }
    }
}

And when you try to configure it as follows:

  <specFlow>
    <!-- For additional details on SpecFlow configuration options see http://go.specflow.org/doc-config -->
    <plugins>
      <add name="CodedUIGeneratorProvider" path="." type="GeneratorAndRuntime"/>
    </plugins>
    <generator dependencies="CodedUIGeneratorProvider"/>
    <runtime dependencies="CodedUIGeneratorProvider"/>
  </specFlow>

The following error message appears:

: SpecFlow → . : ​​ .

SpecFlow, :

 System.Configuration.dll!System.Configuration.ConfigurationProperty.ConvertFromString(string value) + 0x2a bytes
 System.Configuration.dll!System.Configuration.ConfigurationElement.DeserializePropertyValue(System.Configuration.ConfigurationProperty prop, System.Xml.XmlReader reader) + 0x36 bytes
 System.Configuration.dll!System.Configuration.ConfigurationElement.DeserializeElement(System.Xml.XmlReader reader, bool serializeCollectionKey) + 0x221 bytes
 System.Configuration.dll!System.Configuration.ConfigurationElement.DeserializeElement(System.Xml.XmlReader reader, bool serializeCollectionKey) + 0x78e bytes
 System.Configuration.dll!System.Configuration.ConfigurationSection.DeserializeSection(System.Xml.XmlReader reader) + 0x3c bytes
 TechTalk.SpecFlow.dll!TechTalk.SpecFlow.Configuration.ConfigurationSectionHandler.CreateFromXml(string xmlContent) + 0xb0 bytes
 TechTalk.SpecFlow.Generator.dll!TechTalk.SpecFlow.Generator.Configuration.GeneratorConfigurationProvider.LoadConfiguration(TechTalk.SpecFlow.Generator.Interfaces.SpecFlowConfigurationHolder configurationHolder, TechTalk.SpecFlow.Generator.Configuration.SpecFlowProjectConfiguration configuration) + 0x41 bytes
 TechTalk.SpecFlow.Vs2010Integration.dll!TechTalk.SpecFlow.Vs2010Integration.Generator.VsGeneratorInfoProvider.GenGeneratorConfig() + 0x52 bytes
 TechTalk.SpecFlow.Vs2010Integration.dll!TechTalk.SpecFlow.Vs2010Integration.Generator.VsGeneratorInfoProvider.GetGeneratorInfo() + 0x3a bytes
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.RemoteGeneratorServices.GetGeneratorInfo() Line 38 + 0x9 bytesC#
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.RemoteGeneratorServices.GetTestGeneratorFactoryForCreate() Line 43 + 0xa bytesC#
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.GeneratorServices.CreateTestGenerator() Line 24 + 0xa bytesC#
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.IdeSingleFileGenerator.GenerateCode(string inputFilePath, string inputFileContent,  TechTalk.SpecFlow.IdeIntegration.Generator.GeneratorServices generatorServices, TechTalk.SpecFlow.Generator.Interfaces.ProjectSettings projectSettings) Line 38 + 0x29 bytesC#
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.IdeSingleFileGenerator.Generate(string inputFilePath, string inputFileContent,  TechTalk.SpecFlow.IdeIntegration.Generator.GeneratorServices generatorServices, TechTalk.SpecFlow.Utils.CodeDomHelper codeDomHelper,  TechTalk.SpecFlow.Generator.Interfaces.ProjectSettings projectSettings) Line 23 + 0x12 bytesC#
 TechTalk.SpecFlow.IdeIntegration.dll!TechTalk.SpecFlow.IdeIntegration.Generator.IdeSingleFileGenerator.GenerateFile(string inputFilePath, string outputFilePath,  System.Func<TechTalk.SpecFlow.IdeIntegration.Generator.GeneratorServices> generatorServicesProvider, System.Func<string,string> inputFileContentProvider,  System.Action<string,string> outputFileContentWriter) Line 92 + 0x13 bytesC#
 TechTalk.SpecFlow.Vs2010Integration.dll!TechTalk.SpecFlow.VsIntegration.SingleFileGenerator.SpecFlowSingleFileGeneratorBase.GenerateInternal(string inputFilePath, string inputFileContent, EnvDTE.Project project, string defaultNamespace, System.Action<TechTalk.SpecFlow.VsIntegration.SingleFileGenerator.SingleFileGeneratorError> onError, out string generatedContent) + 0x18e bytes
 TechTalk.SpecFlow.Vs2010Integration.dll!TechTalk.SpecFlow.VsIntegration.SingleFileGenerator.SingleFileGeneratorBase.Generate(string inputFilePath, string inputFileContents, string defaultNamespace, System.IntPtr[] rgbOutputFileContents, out uint pcbOutput, Microsoft.VisualStudio.Shell.Interop.IVsGeneratorProgress generateProgress) + 0xc3 bytes
 [Native to Managed Transition]

, , TechTalk.SpecFlow.IdeIntegration.Generator.RemoteGeneratorServices.generatorInfoProvider - null.

, . .

:

, . altenatively " " SpecFlow.

+5
2

, SpecFlow 2.1.0, CodedUIGeneratorProvider:

    public void Initialize(GeneratorPluginEvents generatorPluginEvents, GeneratorPluginParameters generatorPluginParameters)
    {
        generatorPluginEvents.CustomizeDependencies += GeneratorPluginEvents_CustomizeDependencies;
    }

    private void GeneratorPluginEvents_CustomizeDependencies(object sender, CustomizeDependenciesEventArgs eventArgs)
    {
        eventArgs.ObjectContainer.RegisterTypeAs<CodedUIGeneratorProvider, IUnitTestGeneratorProvider>();
    }

CustomPlugin , , .

. https://github.com/techtalk/SpecFlow/wiki/Plugins

+1

:)

, RegisterTypeAs:

public void RegisterCustomizations(ObjectContainer container, SpecFlowProjectConfiguration generatorConfiguration)
{
    container.RegisterTypeAs<CodedUIGeneratorProvider, IUnitTestGeneratorProvider>();
}

, :

<specFlow>
  <!-- For additional details on SpecFlow configuration options see http://go.specflow.org/doc-config -->
  <plugins>
    <add name="CodedUIGeneratorProvider" path="." type="Generator"/>
  </plugins>
</specFlow>

( *.SpecflowPlugin.dll) path=".\Lib" plugins\add.

. http://blog.jessehouwing.nl/2013/04/creating-custom-unit-test-generator.html

+5

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