Creating a mock HttpServletRequest out of a url string

Question

I have a service that does some work on an HttpServletRequest object  specifically using the request getParameterMap and request getParameter to construct an object   I was wondering if there is a straightforward way to take a provided url  in the form of a string  say   String url    http   www example com  param1 value1 amp param     and easily convert it to a HttpServletRequest object so that I can test it with my unit tests  Or at least just so that request getParameterMap and request getParameter work correctly

User · Answer

You would generally test these sorts of things in an integration test, which actually connects to a service. To do a unit test, you should test the objects used by your servlet's doGet/doPost methods.

In general you don't want to have much code in your servlet methods, you would want to create a bean class to handle operations and pass your own objects to it and not servlet API objects.

User · Answer

for those looking for a way to mock POST HttpServletRequest with Json payload  the below is in Kotlin  but the key take away here is the DelegatingServetInputStream when you want to mock the request getInputStream from the HttpServletRequest   Mock private lateinit var request  HttpServletRequest   Mock private lateinit var response  HttpServletResponse   Mock private lateinit var chain  FilterChain   InjectMocks private lateinit var filter  ValidationFilter    Test fun  continue filter chain with valid json payload          val payload               firstName   aB          middleName   asdadsa          lastName   asdsada          dob  null         gender   male           trimMargin        whenever request requestURL           thenReturn StringBuffer   profile personal-details        whenever request method           thenReturn  PUT       whenever request inputStream           thenReturn DelegatingServletInputStream ByteArrayInputStream payload toByteArray           filter doFilter request  response  chain       verify chain  doFilter request  response

User · Answer

Here it is how to use MockHttpServletRequest      given MockHttpServletRequest request   new MockHttpServletRequest    request setServerName  www example com    request setRequestURI   foo    request setQueryString  param1 value1 amp param        when String url   request getRequestURL           request getQueryString       assuming there is always queryString      then assertThat url  is  http   www example com 80 foo param1 value1 amp param

User · Answer

Spring has MockHttpServletRequest in its spring-test module   If you are using maven you may need to add the appropriate dependency to your pom xml  You can find spring-test at mvnrepository com

User · Answer

Simplest ways to mock an HttpServletRequest    Create an anonymous subclass   HttpServletRequest mock   new HttpServletRequest          private final Map lt String  String   gt  params      whatever         public Map lt String  String   gt  getParameterMap                 return params             public String getParameter String name                String   matches   params get name           if  matches    null    matches length    0  return null          return matches 0                 TODO  many  methods to implement here     Use jMock  Mockito  or some other general-purpose mocking framework   HttpServletRequest mock   context mock HttpServletRequest class      jMock HttpServletRequest mock2   Mockito mock HttpServletRequest class      Mockito  Use HttpUnit s ServletUnit and don t mock the request at all

[java] Creating a mock HttpServletRequest out of a url string?

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