@Test
public void testDecodeExtent() {

    MutableBitSet all = bits(0, 1, 2, 3, 4, 5, 6);
    assertEquals(context.decodeExtent(new Concept(bits(), all)), list());
    assertEquals(context.decodeExtent(new Concept(bits(0), all)), list("a"));
    assertEquals(context.decodeExtent(new Concept(bits(1, 2), all)), list("b", "c"));
    exception.expect(java.lang.IndexOutOfBoundsException.class);
    context.decodeExtent(new Concept(bits(7), all));
}