Unit Testing With Spock

We are going to test using unit test with Spock the LoggerInterceptor class, for more information regarding what this class does, please visit this post: IP Whitelist Using Interceptors

package com.jos.dem.jmailer.interceptor

import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse

import org.springframework.beans.factory.annotation.Autowired
import org.springframework.web.servlet.HandlerInterceptor
import org.springframework.web.servlet.ModelAndView
import javax.annotation.PostConstruct

import com.jos.dem.jmailer.service.LoggerService
import com.jos.dem.jmailer.constant.ApplicationConstants

class LoggerInterceptor implements HandlerInterceptor {

  @Autowired
  LoggerService loggerService
  @Autowired
  Properties properties

  def whiteList = []

  @PostConstruct
  public void setup(){
    whiteList = properties.getProperty(ApplicationConstants.WHITE_LIST).tokenize(',')
  }

  boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
    def data = [:]
    data.remoteHost = request.remoteHost
    data.timeInMillis = System.currentTimeMillis()
    data.method = request.method
    data.requestURL = request.requestURL
    data.parameters = request.parameterMap

    if(!whiteList.contains(request.remoteHost)){
      data.warn = "UNAUTORIZED IP was detected in attempt to access to resource"
      loggerService.notifyRequest(data)
      return false
    }

    loggerService.notifyRequest(data)
    return true
  }


  void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
  }


  void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
  }

}

Regarding LogginInterceptorSpec we can consider the following aspects:

• Any Spock test must extend Specification
• Setup method is executed before any test defined in our test class
• We are defining mock objects using Mock annotation
• In the setup method we are assigning our mocks

package com.jos.dem.jmailer.interceptor

import spock.lang.Specification

import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse

import com.jos.dem.jmailer.service.LoggerService

class LoggerInterceptorSpec extends Specification {

  def interceptor = new LoggerInterceptor()

  def request = Mock(HttpServletRequest)
  def response = Mock(HttpServletResponse)
  def loggerService = Mock(LoggerService)
  def properties = new Properties()

  def setup(){
    properties.setProperty('white.list','127.0.0.1')
    interceptor.loggerService = loggerService
    interceptor.properties = properties
    interceptor.setup()
  }

  void "should accept localhost"(){
    given:"An ip address"
      String localhost = '127.0.0.1'
    when:"We preHandle request"
     request.remoteHost >> localhost
     def result = interceptor.preHandle(request, response, new Object())
    then:"We expect access"
     result
     1 * loggerService.notifyRequest(_ as Map)
  }

  void "should not accept strangers"(){
    given:"An ip address"
      String localhost = '127.0.0.1'
    when:"We preHandle request"
     request.remoteHost >> '189.217.63.188'
     def result = interceptor.preHandle(request, response, new Object())
    then:"We expect access denied"
     !result
     1 * loggerService.notifyRequest(_ as Map)
  }
}

Regarding our first test method we should read as follow:

• Given an ip address as String
• When request.remoteHost return ‘127.0.0.1’ // We are defining our mock behavior
• def result = interceptor.preHandle(request, response, new Object()) // In this line we are calling our testing method
• Then we expect the result is true
• loggerService.notifyRequest(_ as Map) // This method is called once with a Map as parameter

For more information how to use Spock Spock Framework Reference Documentation

To download the project:

git clone https://github.com/josdem/jmailer-bootstrap.git
git fetch
git checkout feature/testing

To run this test:

gradle -Dtest.single=LoggerInterceptorSpec :web:test

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