private static final BigInteger BAD_FOR_ANDROID_Q = new BigInteger("-1");

  @GwtIncompatible // TODO
  @AndroidIncompatible // slow
  public void testDivNonZeroExact() {
    String runtimeName = System.getProperty("java.runtime.name");
    boolean isAndroid = runtimeName != null && runtimeName.contains("Android");
    for (BigInteger p : NONZERO_BIGINTEGER_CANDIDATES) {

            assertEquals("⌊" + p + "/" + q + "⌋", Math.floorDiv(p, q), IntMath.divide(p, q, mode));
          }
        }
      }
    }
  }

  @AndroidIncompatible // presumably slow
  public void testDivNonZeroExact() {
    for (int p : NONZERO_INTEGER_CANDIDATES) {
      for (int q : NONZERO_INTEGER_CANDIDATES) {
        // Skip some tests that fail due to GWT's non-compliant int implementation.