assertThat(locations).isNotEmpty();
    for (ClassPath.LocationInfo location : locations) {
      ImmutableSet<ResourceInfo> resources = location.scanResources();
      assertThat(location.scanResources()).containsExactlyElementsIn(resources);
    }
  }

  public void testLocationsFrom_idempotentLocations() {
    ImmutableSet<ClassPath.LocationInfo> locations =

    assertThat(locations).isNotEmpty();
    for (ClassPath.LocationInfo location : locations) {
      ImmutableSet<ResourceInfo> resources = location.scanResources();
      assertThat(location.scanResources()).containsExactlyElementsIn(resources);
    }
  }

  public void testLocationsFrom_idempotentLocations() {
    ImmutableSet<ClassPath.LocationInfo> locations =

    public final File file() {
      return home;
    }

    /** Scans this location and returns all scanned resources. */
    public ImmutableSet<ResourceInfo> scanResources() throws IOException {
      return scanResources(new HashSet<File>());
    }

    /**
     * Scans this location and returns all scanned resources.
     *