### Question:
RandomPartitionerTokenRing implements TokenRing { @Override public double getRingFraction(String start, String end) { return getTokenCountInRange(start, end).doubleValue() / TOTAL_TOKEN_COUNT.doubleValue(); } private  RandomPartitionerTokenRing(); @Override double getRingFraction(String start, String end); @Override BigInteger getTokenCountInRange(String startToken, String endToken); static final RandomPartitionerTokenRing INSTANCE; }### Answer:
@Test public void testGetRingFraction() { assertEquals(tokenRing.getTokenCountInRange("0", "1"), ONE); assertEquals(tokenRing.getTokenCountInRange("0", "200"), new BigInteger("200")); assertEquals(tokenRing.getTokenCountInRange("0", "10"), new BigInteger("10")); assertEquals(tokenRing.getTokenCountInRange("1", "11"), new BigInteger("10")); assertEquals(tokenRing.getTokenCountInRange("0", "0"), ZERO); assertEquals(tokenRing.getTokenCountInRange("-1", "-1"), BigInteger.valueOf(2).pow(127).add(ONE)); assertEquals(tokenRing.getTokenCountInRange("1", "0"), BigInteger.valueOf(2).pow(127)); }