public void FindByUsername_WhenUsernameNotCached_ExpectToSearchLdapAndFindUser()
{
_authenticationService.Setup(m => m.FindUser(It.IsAny <string>()))
.Returns(new OpenLdapAppUser {
Username = "******"
});
var user = _inMemoryUserStore.FindByUsername("username");
Assert.Equal("username", user.Username);
_authenticationService.VerifyAll();
}