code: @Test public void testSimpleAuthenticationProvider() throws Exception {
    MockEnvironment env=new MockEnvironment();
    env.setProperty("shell.auth","simple");
    env.setProperty("shell.auth.simple.user.name","user");
    env.setProperty("shell.auth.simple.user.password","password");
    this.context=new AnnotationConfigWebApplicationContext();
    this.context.setEnvironment(env);
    this.context.setServletContext(new MockServletContext());
    this.context.register(SecurityConfiguration.class);
    this.context.register(CrshAutoConfiguration.class);
    this.context.refresh();
    PluginLifeCycle lifeCycle=this.context.getBean(PluginLifeCycle.class);
    assertEquals("simple",lifeCycle.getConfig().get("crash.auth"));
    AuthenticationPlugin<String> authenticationPlugin=null;
    String authentication=lifeCycle.getConfig().getProperty("crash.auth");
    assertNotNull(authentication);
    for (  AuthenticationPlugin plugin : lifeCycle.getContext().getPlugins(AuthenticationPlugin.class)) {
      if (authentication.equals(plugin.getName())) {
        authenticationPlugin=plugin;
        break;
      }
    }
    assertNotNull(authenticationPlugin);
    assertTrue(authenticationPlugin.authenticate("user","password"));
    assertFalse(authenticationPlugin.authenticate(UUID.randomUUID().toString(),"password"));
  }
  