javaPOST /__admin/mappings/reset
mockServer
  .stubFor(
    get(urlPathEqualTo("/nextBusinessDay"))
    .willReturn(
      aResponse()
      .withHeaders(new HttpHeaders(
        HttpHeader.httpHeader("content-type", "application/json")
      ))
      .withJsonBody(
        JsonNodeFactory
        .instance
        .objectNode()
        .put("nextBusinessDay",
          LocalDateTime
          .now()
          .plusDays(1)
          .format(API_DATE_FORMATTER)
        )
      )
    )
  );
java -jar wiremock-standalone-2.10.1.jar
Criando mock via API
$ curl -X POST \
--data '{ "request": { "url": "/get/this", "method": "GET" }, "response": { "status": 200, "body": "Here it is!\n" }}' \
http://localhost:8080/__admin/mappings/new
Testando
$ curl http://localhost:8080/get/this
Here it is!
Criando mock via arquivo (tem que derrubar e subir o server depois de criar/deletar o arquivo)
{
	"request": {
		"method": "GET",
		"url": "/api/mytest"
	},
	"response": {
		"status": 200,
		"body": "More content\n"
	}
}
Testando
$ curl -XGET localhost:8080/api/mytest
wiremock commands
metadata={"id": 711, "createdAt": "2020-09-02 22:16:40.028442", "updatedAt": "2020-09-02 22:16:48.321874"}