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Howard van Rooijen By Howard van Rooijen Co-Founder
SpecFlow Extensions for Azure Storage Emulator

In most cases, when writing an integration specifications against Azure Storage, you want to use the real thing rather than the Storage Emulator as the performance profile and behaviours are noticeably different. One exception is if you've hosted your code in a public repo; in this case you really don't want to commit your real Azure Storage connection details into that repo to allow your integration tests to run on your build server. So it makes more sense to try and make your spec run against the emulator.

Mike Larah wrote a neat little extension for SpecFlow that allows you to specify a @storage_emulator tag against your scenario and this will seek out the Storage Emulator and invoke it, if it's not already running. The example below shows how simple it is to use:

@container @storage_emulator
Scenario: A long running task runs to completion
	Given the long running task takes 3 seconds to complete
	And the task is told to cancel if the cancellation token '19d411fc-5014-4eaa-8f84-0fe3d4b93068' is issued
	And no cancelation token is issued
	When I execute the task 
	Then it should complete sucessfully

We've released it as a NuGet Package and is available by using the following command:

Install-Package Endjin.SpecFlow.Azure.Storage

The source code is available on GitHub. We also provide NuGet packages which contain a series of useful steps and transformations:

Install-Package Endjin.SpecFlow

We also provide extensions for our composition framework:

Install-Package Endjin.SpecFlow.Composition

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And for hosting static files:

Install-Package Endjin.SpecFlow.Owin.Hosting


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Howard van Rooijen


Howard van Rooijen

Howard spent 10 years as a technology consultant helping some of the UK's best known organisations work smarter, before founding endjin in 2010. He's a Microsoft ScaleUp Mentor, and a Microsoft MVP for Azure and Developer Technologies, and helps small teams achieve big things using data, AI and Microsoft Azure.