code: public static void assertEquals(String message, float expected,
              float actual, float delta) {
          if (floatIsDifferent(expected, actual, delta)) {
              failNotEquals(message, Float.valueOf(expected), Float.valueOf(actual));
          }
      }
docs: Asserts that two floats are equal to within a positive delta.
  If they are not, an {@link AssertionError} is thrown with the given
  message. If the expected value is infinity then the delta value is
  ignored. NaNs are considered equal:
  <code>assertEquals(Float.NaN, Float.NaN, *)</code> passes
  
  @param message the identifying message for the {@link AssertionError} (<code>null</code>
  okay)
  @param expected expected value
  @param actual the value to check against <code>expected</code>
  @param delta the maximum delta between <code>expected</code> and
  <code>actual</code> for which both numbers are still
  considered equal.