NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(Iterables.class);
  }

  // More exhaustive tests are in IteratorsTest.
  public void testElementsEqual() throws Exception {
    Iterable<?> a;
    Iterable<?> b;

    // A few elements.
    a = asList(4, 8, 15, 16, 23, 42);
    b = asList(4, 8, 15, 16, 23, 42);
    assertTrue(elementsEqual(a, b));