System.Numerics.Tests.cast_fromTest.RunSByteExplicitCastFromBigIntegerTests C# (CSharp) Метод

        public static void RunSByteExplicitCastFromBigIntegerTests()
        {
            SByte value = 0;
            BigInteger bigInteger;

            // SByte Explicit Cast from BigInteger: Random value < SByte.MinValue
            bigInteger = GenerateRandomBigIntegerLessThan(SByte.MinValue, s_random);
            value = (SByte)bigInteger.ToByteArray()[0];
            Assert.Throws<OverflowException>(() => VerifySByteExplicitCastFromBigInteger(value, bigInteger));

            // SByte Explicit Cast from BigInteger: SByte.MinValue - 1
            bigInteger = new BigInteger(SByte.MinValue);
            bigInteger -= BigInteger.One;
            value = (SByte)bigInteger.ToByteArray()[0];
            Assert.Throws<OverflowException>(() => VerifySByteExplicitCastFromBigInteger(value, bigInteger));

            // SByte Explicit Cast from BigInteger: SByte.MinValue
            VerifySByteExplicitCastFromBigInteger(SByte.MinValue);

            // SByte Explicit Cast from BigInteger: Random Negative
            for (int i = 0; i < NumberOfRandomIterations; ++i)
            {
                VerifySByteExplicitCastFromBigInteger((SByte)s_random.Next(SByte.MinValue, 0));
            }

            // SByte Explicit Cast from BigInteger: -1
            VerifySByteExplicitCastFromBigInteger(-1);

            // SByte Explicit Cast from BigInteger: 0
            VerifySByteExplicitCastFromBigInteger(0);

            // SByte Explicit Cast from BigInteger: 1
            VerifySByteExplicitCastFromBigInteger(1);

            // SByte Explicit Cast from BigInteger: Random Positive
            for (int i = 0; i < NumberOfRandomIterations; ++i)
            {
                VerifySByteExplicitCastFromBigInteger((SByte)s_random.Next(1, SByte.MaxValue));
            }

            // SByte Explicit Cast from BigInteger: SByte.MaxValue
            VerifySByteExplicitCastFromBigInteger(SByte.MaxValue);

            // SByte Explicit Cast from BigInteger: SByte.MaxValue + 1
            bigInteger = new BigInteger(SByte.MaxValue);
            bigInteger += BigInteger.One;
            value = (SByte)bigInteger.ToByteArray()[0];
            Assert.Throws<OverflowException>(() => VerifySByteExplicitCastFromBigInteger(value, bigInteger));

            // SByte Explicit Cast from BigInteger: Random value > SByte.MaxValue
            bigInteger = GenerateRandomBigIntegerGreaterThan((UInt64)SByte.MaxValue, s_random);
            value = (SByte)bigInteger.ToByteArray()[0];
            Assert.Throws<OverflowException>(() => VerifySByteExplicitCastFromBigInteger(value, bigInteger));
        }