WireMock Extensions

wiremock-extensions is a set of extensions for WireMock.

Installation

For now, wiremock-extensions is not published on Maven Central Repository.
The only way is through the WireMock standalone process.

1. Download WireMock Jar
2. Download Extension Jar
3. Run

  java -cp "wiremock-standalone-2.8.0.jar:wiremock-extensions_2.11-0.15.jar" \
       com.github.tomakehurst.wiremock.standalone.WireMockServerRunner \
       --extensions tv.teads.wiremock.extension.JsonExtractor,tv.teads.wiremock.extension.Calculator,tv.teads.wiremock.extension.FreeMarkerRenderer,tv.teads.wiremock.extension.Randomizer

WireMock JSON Extractor

wiremock-json-extractor is a WireMock extension that can generate a response from a JSON request.
It recognizes all JSONPaths from the response's template and try to replace them by the correct value from the request. You can also specify a fallback value that will be use if nothing was found when searching for the JSONPath.

{
  "request": {
    "method": "POST",
    "url": "/some/url"
  },
  "response": {
    "status": 200,
    "body": "I found ${$.value} for $.value. Sadly, I found nothing for ${$.undefined},
       so I will have to use the fallback value: ${$.undefined§3}",
    "transformers": ["json-extractor"]
  }
}

POST /some/url HTTP/1.1
Content-Type: application/json
{ "value": 12 }

HTTP/1.1 200 OK
I found 12 for $.value. Sadly, I found nothing for ${$.undefined},
 so I will have to use the fallback value: 3

You can check every supported operators on the Gatling JSONPath Syntax documentation.

WireMock Calculator

{
  "request": {
    "method": "GET",
    "url": "/some/url"
  },
  "response": {
    "status": 200,
    "body": "What is the value of 1+2*3? Simple, it is: ${1+2*3}",
    "transformers": ["calculator"]
  }
}

GET /some/url HTTP/1.1

HTTP/1.1 200 OK
What is the value of 1+2*3? Simple, it is: 7

WireMock Randomizer

Random generators supported:

• RandomInteger: integer values from 0 to Integer.MAX_VALUE
• RandomDouble: double values from 0.0 to 1.0
• RandomBoolean: true or false values
• RandomFloat: float values from 0.0 to 1.0
• RandomLong: absolute long values
• RandomString: string of 10 characters
• RandomUUID: random UUID

{
  "request": {
    "method": "GET",
    "url": "/some/url"
  },
  "response": {
    "status": 200,
    "body": "Random integer generated: @{RandomInteger}",
    "transformers": ["randomizer"]
  }
}

GET /some/url HTTP/1.1

HTTP/1.1 200 OK
Random integer generated: 784129741

WireMock FreeMarkerRenderer

wiremock-freemarker-renderer is a WireMock extension that can generate a response from a FreeMarker template.
It maps an incoming JSON request to a FreeMarker data model. $ can be used to call the root object. It allows a syntax close to JSONPath.

{
  "request": {
    "method": "POST",
    "url": "/some/url"
  },
  "response": {
    "status": 200,
    "body": "I found ${$.value} for $.value. Sadly, I found nothing for ${$.undefined!"$.undefined"}, 
       so I will have to use the fallback value: ${$.undefined!3}",
    "transformers": ["freemarker-renderer"]
  }
}

POST /some/url HTTP/1.1
Content-Type: application/json
{ "value": 12 }

HTTP/1.1 200 OK
I found 12 for $.value. Sadly, I found nothing for $.undefined, 
 so I will have to use the fallback value: 3

You can check all the possibilities on the FreeMarker documentation.