anchor.diff:  
   The question is "How could we most easily run the test as a specific user?"
   The answer is to use `@WithMockUser`.
  -The following test will be ran as a user with the username "user", the password "password", and the roles "ROLE_USER".
  +The following test will be run as a user with the username "user", the password "password", and the roles "ROLE_USER".
   
   [source,java]
   ----
  
positive.code: 
  	public SecurityContext createSecurityContext(WithUserDetails withUser) {
  		String username = withUser.value();
  		Assert.hasLength(username, "value() must be non empty String");
  		UserDetails principal = userDetailsService.loadUserByUsername(username);
  		Authentication authentication = new UsernamePasswordAuthenticationToken(principal, principal.getPassword(), principal.getAuthorities());
  		SecurityContext context = SecurityContextHolder.createEmptyContext();
  
negative.code: 
  This is a basic example of how to setup Spring Security Test. The highlights are:
  
  <1> `@RunWith` instructs the spring-test module that it should create an `ApplicationContext`. This is no different than using the existing Spring Test support. For additional information, refer to the http://docs.spring.io/spring-framework/docs/4.0.x/spring-framework-reference/htmlsingle/#integration-testing-annotations-standard[Spring Reference]
  <2> `@ContextConfiguration` instructs the spring-test the configuration to use to create the `ApplicationContext`. Since no configuration is specified, the default configuration locations will be tried. This is no different than using the existing Spring Test support. For additional information, refer to the http://docs.spring.io/spring-framework/docs/4.0.x/spring-framework-reference/htmlsingle/#testcontext-ctx-management[Spring Reference]
  
  NOTE: Spring Security hooks into Spring Test support using the `WithSecurityContextTestExecutionListener` which will ensure our tests are ran with the correct user.
  It does this by populating the `SecurityContextHolder` prior to running our tests.
  After the test is done, it will clear out the `SecurityContextHolder`.
  If you only need Spring Security related support, you can replace `@ContextConfiguration` with `@SecurityTestExecutionListeners`.
  