Mocking Consul from HTTP client

[Zac Herby]

I'm building an HTTP client to Consul (Java) that will read/write KV pairs and service registrations to a specified Consul server.

In this library's automated tests, I'd like to mock Consul and was wondering if this community had any recommendations for me (perhaps there is some little known "embedded Consul" project or something like that)?

Any input/steering whatsoever is greatly appreciated!

Zac

[Ryan Uber]

Hey Zac,

While it's certainly possible to mock Consul's API responses, the route we took for Consul's own Go client was to just fork a new Consul server process and use the actual API's instead. We wrapped this into a little library that we used in a number of places, which you can see here: https://github.com/hashicorp/consul/tree/master/testutil. This won't directly solve your use case, but you could do something similar in Java, I imagine, and you'll spend less time trying to stub the world, especially as new releases of Consul are made with new API's.

Hope that helps in some way!

- Ryan

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[Seth Vargo]

We also do the same thing in Consul Template and envconsul - just spin up a single Consul server in the bg :)

Best,

Seth

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[Zac Herby]

Thanks guys! That sounds like the way to go.

[Ryan Breen]

If you are using Travis, you can copypasta this: https://github.com/Cimpress-MCP/fsconsul/blob/master/.travis.yml (though I now realize I'm overdue to update the versions I use).

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[Paweł Szymczyk]

Hi Zac

I've created something which is perfect for you - embedded-consul https://github.com/pszymczyk/embedded-consul. It's simple Java library which provides easy way to run consul dev server in JVM stack. It provides JUnit rule or can be started manually.

Regars

Paweł Szymczyk