assertTrue(StrictMath.pow(2.0, log2 + 1) > d);
      }
    }
  }

  @GwtIncompatible // DoubleMath.log2(double, RoundingMode)
  public void testRoundLog2Half() {
    // We don't expect perfect rounding accuracy.
    for (int exp : asList(-1022, -50, -1, 0, 1, 2, 3, 4, 100, 1022, 1023)) {
      for (RoundingMode mode : asList(HALF_EVEN, HALF_UP, HALF_DOWN)) {
        double x = Math.scalb(Math.sqrt(2) + 0.001, exp);

  @GwtIncompatible // sqrt
  public void testSqrtExactMatchesFloorOrThrows() {
    for (int x : POSITIVE_INTEGER_CANDIDATES) {
      int floor = IntMath.sqrt(x, FLOOR);
      // We only expect an exception if x was not a perfect square.
      boolean isPerfectSquare = floor * floor == x;
      try {
        assertEquals(floor, IntMath.sqrt(x, UNNECESSARY));
        assertTrue(isPerfectSquare);
      } catch (ArithmeticException e) {

1D1C0         ; mapped                 ; 1D1BA 1D165 1D16F #3.1 MUSICAL SYMBOL FUSA BLACK
1D1C1..1D1DD  ; valid                  ;      ; NV8    # 3.1  MUSICAL SYMBOL LONGA PERFECTA REST..MUSICAL SYMBOL PES SUBPUNCTIS
1D1DE..1D1E8  ; valid                  ;      ; NV8    # 8.0  MUSICAL SYMBOL KIEVAN C CLEF..MUSICAL SYMBOL KIEVAN FLAT SIGN