WIP: Dynamic mocks with Thymeleaf

[mihaita-tinta]

Changes to the body transformer

For a given request

{
    "request": {
        "method": "GET",
        "urlPattern": "/step1/slash1/[0-9]+?/slash2/[0-9]+?.*"
    },
    "response": {
        "fixedDelayMilliseconds": 200,
        "status": 200,
        "bodyFileName": "step1.json",
        "transformers": ["thymeleaf-body-transformer"],
        "transformerParameters": {
            "urlRegex" : "/step1/slash1/(?<slash1Var>.*?)/slash2/(?<slash2Var>.*?)\\?one=(?<oneVar>.*?)\\&two=(?<twoVar>.*?)\\&three=(?<threeVar>.*?)"
        }
    }
}

step1.json

{"var":"[(${foo})]"}
[(${session.put('foo', foo)})]

We can store some data in a session object. In the next call we can retrieve that information:

{
    "request": {
        "method": "GET",
        "urlPattern": "/step2/slash1/[0-9]+?/slash2/[0-9]+?.*"
    },
    "response": {
        "fixedDelayMilliseconds": 200,
        "status": 200,
        "bodyFileName": "step2.json",
        "transformers": ["thymeleaf-body-transformer"],
        "transformerParameters": {
            "urlRegex" : "/step2/slash1/(?<slash1Var>.*?)/slash2/(?<slash2Var>.*?)\\?one=(?<oneVar>.*?)\\&two=(?<twoVar>.*?)\\&three=(?<threeVar>.*?)"
        }
    }
}

step2.json

{"var":"[(${session.get('foo')})]"}

And reuse it for a different response

Lists

{ "list" : [
                [# th:each="element,index : ${utils.list(5)}" ]
                [(${index.current})]
                [# th:if="!${index.last}" ],[/]
            [/]
            ]
}

produces

{ "list" : [0,1,2,3,4]}

JWT support

We can extract values from the JWT by passing the header value to the accessToken util method:

{"var":"[(${utils.accessToken(xjwt).getClaimValue('name')})]"}

Based on the expression above, the x-jwt header would transform the var value to 'John Doe'

 given()
            .contentType("application/json")
            .header("x-jwt", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c")
            .post("/test/step1")
            .then()
            .statusCode(200)
            .body("var", equalTo("John Doe"));

We can generate a jwt with a specified subject

{"jwt":"[(${utils.jwt('123')})]"}

Result is:

{"jwt":"eyJhbGciOiJSUzI1NiJ9.eyJleHAiOjE1ODgyODI4NjUsImp0aSI6ImJPYm52VXQ2dTZUN05SWEJwdWFFOEEiLCJpYXQiOjE1ODgyODIyNjUsIm5iZiI6MTU4ODI4MjE0NSwic3ViIjoiMTIzIn0.fwTDFWFNHR5HNq47ctKDLLP-5ML2h4sAh6dkZfxAix7kQ7DoLUqHusUm21deRe6VnkYisvoqV0Qyi_p4QgJFNzB6rgODIM41SjvopelQdueVSys9eNnTVr5nmwyyNLvzuutfd0xzYlJyHgjlAMa8Yw2RwxJRvKJo2NtsV02LpmWTUHQoccGfkl1yGabsfilGa-P4G4YpOWvKmJcwBpFwMp50AHXYY1oPhIsunaeeIskhgiEbhQMvBIMCu_R_UbGRNTEldGleqSGjsKqhkUDNi-q7VIBMiPSQYolzhMrkRbq891BzM1odEGviToMU1sEkgFP287f-_w4UqqD14tFWWA"}

Time support

{"var":"[(${#temporals.formatISO(#temporals.createNow())})]"}

Evaluates to:

{"var":"2020-04-30T15:04:58.225+0000"}

Global counter

{"var":"[(${counter.incrementAndGet()})]", "var2":"[(${counter.incrementAndGet()})]"}

Evaluates to:

{"var":"1", "var2":"2"}

Random values

{"var":"[(${utils.random().nextInt(1000)})]"}

Evaluates to:

{"var":"814"}

Webhook notifications

We can send post requests with a specific payload in the request body:

{ "webhook": "start" }
[(${http.post('http://localhost:8080/webhook/target','{"uuid":"123536d7-eef5-4982-964c-f04c283f0b91"}').join()})]

The http://localhost:8080/webhook/target endpoint is being called
With the example mapping below:

{ "webhook": "webhook" }[(${session.put('key', uuid)})]

We can check wiremock it has the uuid field sent from our webhook notification (in another endpoint):

 {"key":"[(${session.get('key')})]"}