SpringFoxSpec.groovy

package grails.springfox.sample

import grails.testing.mixin.integration.Integration
import groovy.json.JsonOutput
import org.junit.Assert
import org.skyscreamer.jsonassert.JSONAssert
import org.skyscreamer.jsonassert.JSONCompareMode
import org.springframework.boot.context.embedded.LocalServerPort
import spock.lang.Specification

import static io.restassured.RestAssured.get

@Integration
class SpringFoxSpec extends Specification implements FileAccess {
  @LocalServerPort
  private int port

  void "Contract tests for the api documentation"() {
    given:
      def expected = fileContents("/expected-service-description.json")
      def actual = get("http://localhost:$port/v2/api-docs").asString()

    expect:
      try {
        JSONAssert.assertEquals(
            expected.replaceAll("__PORT__", "$port"),
            actual,
            JSONCompareMode.NON_EXTENSIBLE)
      } catch (AssertionError e) {
        Assert.fail("${e.getMessage()}${System.getProperty("line.separator")}${JsonOutput.prettyPrint(actual)}")
      }
  }
}