CachingAuthenticatorTest.java

package io.dropwizard.auth;

import com.codahale.metrics.MetricRegistry;
import com.google.common.cache.CacheBuilderSpec;
import com.google.common.collect.ImmutableSet;
import org.hamcrest.CoreMatchers;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.mockito.InOrder;

import java.security.Principal;
import java.util.Optional;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.anyString;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

public class CachingAuthenticatorTest {
    @SuppressWarnings("unchecked")
    private final Authenticator<String, Principal> underlying = mock(Authenticator.class);
    private final CachingAuthenticator<String, Principal> cached =
        new CachingAuthenticator<>(new MetricRegistry(), underlying, CacheBuilderSpec.parse("maximumSize=1"));
    @Rule
    public ExpectedException expected = ExpectedException.none();

    @Before
    public void setUp() throws Exception {
        when(underlying.authenticate(anyString())).thenReturn(Optional.of(new PrincipalImpl("principal")));
    }

    @Test
    public void cachesTheFirstReturnedPrincipal() throws Exception {
        assertThat(cached.authenticate("credentials")).isEqualTo(Optional.<Principal>of(new PrincipalImpl("principal")));
        assertThat(cached.authenticate("credentials")).isEqualTo(Optional.<Principal>of(new PrincipalImpl("principal")));

        verify(underlying, times(1)).authenticate("credentials");
    }

    @Test
    public void respectsTheCacheConfiguration() throws Exception {
        cached.authenticate("credentials1");
        cached.authenticate("credentials2");
        cached.authenticate("credentials1");

        final InOrder inOrder = inOrder(underlying);
        inOrder.verify(underlying, times(1)).authenticate("credentials1");
        inOrder.verify(underlying, times(1)).authenticate("credentials2");
        inOrder.verify(underlying, times(1)).authenticate("credentials1");
    }

    @Test
    public void invalidatesSingleCredentials() throws Exception {
        cached.authenticate("credentials");
        cached.invalidate("credentials");
        cached.authenticate("credentials");

        verify(underlying, times(2)).authenticate("credentials");
    }

    @Test
    public void invalidatesSetsOfCredentials() throws Exception {
        cached.authenticate("credentials");
        cached.invalidateAll(ImmutableSet.of("credentials"));
        cached.authenticate("credentials");

        verify(underlying, times(2)).authenticate("credentials");
    }

    @Test
    public void invalidatesCredentialsMatchingGivenPredicate() throws Exception {
        cached.authenticate("credentials");
        cached.invalidateAll("credentials"::equals);
        cached.authenticate("credentials");

        verify(underlying, times(2)).authenticate("credentials");
    }

    @Test
    public void invalidatesAllCredentials() throws Exception {
        cached.authenticate("credentials");
        cached.invalidateAll();
        cached.authenticate("credentials");

        verify(underlying, times(2)).authenticate("credentials");
    }

    @Test
    public void calculatesTheSizeOfTheCache() throws Exception {
        cached.authenticate("credentials1");
        assertThat(cached.size()).isEqualTo(1);
    }

    @Test
    public void calculatesCacheStats() throws Exception {
        cached.authenticate("credentials1");
        assertThat(cached.stats().loadCount()).isEqualTo(1);
        assertThat(cached.size()).isEqualTo(1);
    }

    @Test
    public void shouldNotCacheAbsentPrincipals() throws Exception {
        when(underlying.authenticate(anyString())).thenReturn(Optional.empty());
        assertThat(cached.authenticate("credentials")).isEqualTo(Optional.empty());
        verify(underlying).authenticate("credentials");
        assertThat(cached.size()).isEqualTo(0);
    }

    @Test
    public void shouldPropagateAuthenticationException() throws AuthenticationException {
        final AuthenticationException e = new AuthenticationException("Auth failed");
        when(underlying.authenticate(anyString())).thenThrow(e);
        expected.expect(CoreMatchers.sameInstance(e));
        cached.authenticate("credentials");
    }

    @Test
    public void shouldPropagateRuntimeException() throws AuthenticationException {
        final RuntimeException e = new NullPointerException();
        when(underlying.authenticate(anyString())).thenThrow(e);
        expected.expect(CoreMatchers.sameInstance(e));
        cached.authenticate("credentials");
    }
}