assertEquals(expected, matcher.toString());
    assertEquals(expected, matcher.precomputed().toString());
    assertEquals(expected, matcher.negate().negate().toString());
    assertEquals(expected, matcher.negate().precomputed().negate().toString());
    assertEquals(expected, matcher.negate().precomputed().negate().precomputed().toString());
  }

    assertEquals(expected, matcher.toString());
    assertEquals(expected, matcher.precomputed().toString());
    assertEquals(expected, matcher.negate().negate().toString());
    assertEquals(expected, matcher.negate().precomputed().negate().toString());
    assertEquals(expected, matcher.negate().precomputed().negate().precomputed().toString());
  }

          return BigInteger.valueOf(n);
        }
      };

  private static final Function<Integer, Integer> NEGATE_INT =
      new Function<Integer, Integer>() {
        @Override
        public Integer apply(Integer x) {
          return -x;
        }
      };

  private static final Function<Long, Long> NEGATE_LONG =
      new Function<Long, Long>() {
        @Override
        public Long apply(Long x) {

          return BigInteger.valueOf(n);
        }
      };

  private static final Function<Integer, Integer> NEGATE_INT =
      new Function<Integer, Integer>() {
        @Override
        public Integer apply(Integer x) {
          return -x;
        }
      };

  private static final Function<Long, Long> NEGATE_LONG =
      new Function<Long, Long>() {
        @Override
        public Long apply(Long x) {

   * probability.
   */
  static BigInteger randomNonZeroBigInteger(int numBits) {
    BigInteger result = randomPositiveBigInteger(numBits);
    return RANDOM_SOURCE.nextBoolean() ? result : result.negate();
  }

  /**
   * Chooses a number in (-2^numBits, 2^numBits) at random, with density concentrated in numbers of
   * lower magnitude.
   */
  static BigInteger randomBigInteger(int numBits) {

    return new Is(match);
  }

  /**
   * Returns a {@code char} matcher that matches any character except the BMP character specified.
   *
   * <p>To negate another {@code CharMatcher}, use {@link #negate()}.
   */
  public static CharMatcher isNot(final char match) {
    return new IsNot(match);
  }

  /**

   * probability.
   */
  static BigInteger randomNonZeroBigInteger(int numBits) {
    BigInteger result = randomPositiveBigInteger(numBits);
    return RANDOM_SOURCE.nextBoolean() ? result : result.negate();
  }

  /**
   * Chooses a number in (-2^numBits, 2^numBits) at random, with density concentrated in numbers of
   * lower magnitude.
   */
  static BigInteger randomBigInteger(int numBits) {

    return new Is(match);
  }

  /**
   * Returns a {@code char} matcher that matches any character except the BMP character specified.
   *
   * <p>To negate another {@code CharMatcher}, use {@link #negate()}.
   */
  public static CharMatcher isNot(final char match) {
    return new IsNot(match);
  }

  /**

Mit **FastAPI** ist das sehr einfach (dank Starlette), schauen Sie sich die Dokumentation an: [Testen](../tutorial/testing.md){.internal-link target=_blank}

Nachdem Sie Tests erstellt haben, können Sie die **FastAPI**-Version auf eine neuere Version aktualisieren und sicherstellen, dass Ihr gesamter Code ordnungsgemäß funktioniert, indem Sie Ihre Tests ausführen.

    MathPreconditions.checkPositive("BigInteger", BigInteger.ONE);
  }

  public void testCheckPositive_negativeBigInteger() {
    try {
      MathPreconditions.checkPositive("BigInteger", BigInteger.ZERO.negate());
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testCheckNonNegative_zeroInt() {
    MathPreconditions.checkNonNegative("int", 0);
  }