### Question:
MathUtils { public static long nowInNano() { return System.nanoTime(); }  static int signSafeMod(long dividend, int divisor); static int findNextPositivePowerOfTwo(final int value); static long nowInNano(); static long elapsedMSec(long startNanoTime); static long elapsedMicroSec(long startNanoTime); static long elapsedNanos(long startNanoTime);  }### Answer:
@Test public void testNowInNanos() { long nowInNanos = nowInNano(); assertTrue(System.nanoTime() >= nowInNanos); }