@Before
  public void setUp() {
    ImmutableSet<AttributeProvider> providers =
        ImmutableSet.of(
            StandardAttributeProviders.get("basic"),
            StandardAttributeProviders.get("owner"),
            new TestAttributeProvider());
    service = new AttributeService(providers, ImmutableMap.<String, Object>of());
  }
Tests for {@link AttributeService}.

@author Colin Decker
jimfs/src/test/java/com/google/common/jimfs/AttributeServiceTest.java