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Programming language: Go
License: MIT License
Latest version: v1.12.0

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README

mockingjay server

Build StatusCoverage StatusGoDoc

mj example

Mockingjay lets you define the contract between a consumer and producer and with just a configuration file you get:

  • A fast to launch fake server for your integration tests
    • Configurable to simulate the eratic nature of calling other services
  • Consumer driven contracts (CDCs) to run against your real downstream services.

Mockingjay makes it really easy to check your HTTP integration points. It's fast, requires no coding and is better than other solutions because it will ensure your mock servers and real integration points are consistent so that you never have a green build but failing software.

Running a fake server

---
 - name: My very important integration point
   request:
     uri: /hello
     method: POST
     body: "Chris" # * matches any body
   response:
     code: 200
     body: '{"message": "hello, Chris"}'   # * matches any body
     headers:
       content-type: application/json

# define as many as you need...

$ mockingjay-server -config=example.yaml -port=1234 &
2015/04/13 14:27:54 Serving 3 endpoints defined from example.yaml on port 1234
$ curl http://localhost:1234/hello
{"message": "hello, world"}

Check configuration is compatible with a real server

$ mockingjay-server -config=example.yaml -realURL=http://some-real-api.com
2015/04/13 21:06:06 Test endpoint (GET /hello) is incompatible with http://some-real-api - Couldn't reach real server
2015/04/13 21:06:06 Test endpoint 2 (DELETE /world) is incompatible with http://some-real-api - Couldn't reach real server
2015/04/13 21:06:06 Failing endpoint (POST /card) is incompatible with http://some-real-api - Couldn't reach real server
2015/04/13 21:06:06 At least one endpoint was incompatible with the real URL supplied

This ensures your integration test is working against a reliable fake.

Inspect what requests mockingjay has received

 http://{mockingjayhost}:{port}/requests

Calling this will return you a JSON list of requests

Make your fake server flaky

Mockingjay has an annoying friend, a monkey. Given a monkey configuration you can make your fake service misbehave. This can be useful for performance tests where you want to simulate a more realistic scenario (i.e all integration points are painful).

---
# Writes a different body 50% of the time
- body: "This is wrong :( "
  frequency: 0.5

# Delays initial writing of response by a second 20% of the time
- delay: 1000
  frequency: 0.2

# Returns a 404 30% of the time
- status: 404
  frequency: 0.3

# Write 10,000,000 garbage bytes 9% of the time
- garbage: 10000000
  frequency: 0.09

$ mockingjay-server -config=examples/example.yaml -monkeyConfig=examples/monkey-business.yaml
2015/04/17 14:19:53 Serving 3 endpoints defined from examples/example.yaml on port 9090
2015/04/17 14:19:53 Monkey config loaded
2015/04/17 14:19:53 50% of the time | Body: This is wrong :(
2015/04/17 14:19:53 20% of the time | Delay: 1s
2015/04/17 14:19:53 30% of the time | Status: 404
2015/04/17 14:19:53  9% of the time | Garbage bytes: 10000000

Building

Requirements

Build application

$ go get github.com/quii/mockingjay-server
$ cd $GOPATH/src/github.com/quii/mockingjay-server
$ ./build.sh

MIT license


*Note that all licence references and agreements mentioned in the mockingjay README section above are relevant to that project's source code only.