new MockSepPostingsFormat(),
new MockFixedIntBlockPostingsFormat(_TestUtil.nextInt(random, 1, 2000)),
new MockVariableIntBlockPostingsFormat( _TestUtil.nextInt(random, 1, 127)),
new MockRandomPostingsFormat(random),
new NestedPulsingPostingsFormat(),
new Lucene41WithOrds(),
new SimpleTextPostingsFormat(),
new AssertingPostingsFormat(),
new MemoryPostingsFormat(true, random.nextFloat()),
new MemoryPostingsFormat(false, random.nextFloat()));