291 lines
8.7 KiB
C#
291 lines
8.7 KiB
C#
/*
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Copyright 2014 Alex Dyachenko
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This file is part of the MPIR Library.
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The MPIR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version.
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The MPIR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the MPIR Library. If not, see http://www.gnu.org/licenses/.
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*/
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using System;
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using System.Linq;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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namespace MPIR.Tests.HugeIntTests
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{
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[TestClass]
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public class Conversions
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{
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[TestMethod]
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public void IntToStringDecimal()
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{
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var n = "-23429384756298357462983476598345623984756";
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using (var a = new HugeInt(n))
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{
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Assert.AreEqual(n, a.ToString());
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}
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}
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[TestMethod]
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public void IntToStringHex()
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{
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var n = "-23429abcdef298357462983fedcba345623984756";
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using (var a = new HugeInt(n, 16))
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{
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Assert.AreEqual(n, a.ToString(16, true));
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Assert.AreEqual(n.ToUpper(), a.ToString(16));
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}
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}
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#if WIN64
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[TestMethod]
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public void IntToAndFromUlong()
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{
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using (var a = new HugeInt())
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{
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ulong b = 0xF84739ABCDEF4876;
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a.SetTo(b);
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Assert.AreEqual(b.ToString(), a.ToString());
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a.Value = -a;
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ulong c = a.ToUlong();
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Assert.AreEqual(b.ToString(), c.ToString());
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}
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}
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[TestMethod]
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public void IntToAndFromLong()
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{
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using (var a = new HugeInt())
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{
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long b = -0x784739ABCDEF4876;
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a.SetTo(b);
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Assert.AreEqual(b.ToString(), a.ToString());
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long c = a.ToLong();
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Assert.AreEqual(b.ToString(), c.ToString());
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}
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}
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#else
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[TestMethod]
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public void IntToAndFromUint()
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{
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using (var a = new HugeInt())
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{
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uint b = 0xF84739AB;
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a.SetTo(b);
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Assert.AreEqual(b.ToString(), a.ToString());
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a.Value = -a;
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uint c = a.ToUint();
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Assert.AreEqual(b.ToString(), c.ToString());
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}
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}
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[TestMethod]
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public void IntToAndFromInt()
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{
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using (var a = new HugeInt())
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{
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int b = -0x784739AB;
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a.SetTo(b);
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Assert.AreEqual(b.ToString(), a.ToString());
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long c = a.ToInt();
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Assert.AreEqual(b.ToString(), c.ToString());
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}
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}
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#endif
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[TestMethod]
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public void IntToAndFromDouble()
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{
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using (var a = new HugeInt())
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using (var lo = new HugeInt())
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using (var hi = new HugeInt())
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{
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var source = Platform.Select(-123.45e20, -123.45e19);
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var zillion = Platform.Ui(10000000000U, 1000000000U);
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var factor = Platform.Ui(1, 10);
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var exp = Platform.Si(0, 0);
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a.SetTo(source);
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lo.Value = (a/zillion).Rounding(RoundingModes.Floor);
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hi.Value = (a/zillion).Rounding(RoundingModes.Ceiling);
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Assert.IsTrue(lo.ToString() == "-1234500000000" || hi.ToString() == "-1234500000000");
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double c = a.ToDouble();
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Assert.AreEqual(source, c);
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a.Value = (a + a) * factor;
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c = a.ToDouble(out exp);
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Assert.AreEqual(75, exp);
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c *= System.Math.Pow(2, exp);
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Assert.IsTrue(a + zillion >= c);
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Assert.IsTrue(a - zillion <= c);
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}
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}
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[TestMethod]
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public void IntFromString()
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{
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using (var a = new HugeInt())
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{
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var n = "98762934876529834765234123984761";
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a.SetTo(n);
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Assert.AreEqual(n, a.ToString());
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n = "-98ABCDEF876529834765234123984761";
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a.SetTo(n, 16);
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Assert.AreEqual(n, a.ToString(16));
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}
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}
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[TestMethod]
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[ExpectedException(typeof(ArgumentException))]
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public void IntFromInvalidString()
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{
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using (var a = new HugeInt())
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{
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a.SetTo("12345A");
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}
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}
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[TestMethod]
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public void IntToStringTruncated()
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{
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var n = string.Concat("123456789".Select(c => new string(c, 30)));
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using (var a = new HugeInt(n))
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{
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Assert.AreEqual(n, a.ToString(10));
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Assert.AreEqual("..." + n.Substring(n.Length - 256), a.ToString());
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a.Value = -a;
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Assert.AreEqual("-..." + n.Substring(n.Length - 256), a.ToString());
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}
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}
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#if WIN64
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[TestMethod]
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public void IntFitsUlong()
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{
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using (var a = new HugeInt(ulong.MaxValue))
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{
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Assert.IsTrue(a.FitsUlong());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsUlong());
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a.SetTo(0);
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Assert.IsTrue(a.FitsUlong());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsUlong());
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}
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}
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[TestMethod]
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public void IntFitsLong()
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{
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using (var a = new HugeInt(long.MaxValue))
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{
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Assert.IsTrue(a.FitsLong());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsLong());
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a.SetTo(long.MinValue);
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Assert.IsTrue(a.FitsLong());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsLong());
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}
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}
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#endif
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[TestMethod]
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public void IntFitsUint()
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{
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using (var a = new HugeInt(uint.MaxValue))
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{
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Assert.IsTrue(a.FitsUint());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsUint());
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a.SetTo(0);
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Assert.IsTrue(a.FitsUint());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsUint());
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}
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}
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[TestMethod]
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public void IntFitsInt()
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{
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using (var a = new HugeInt(int.MaxValue))
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{
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Assert.IsTrue(a.FitsInt());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsInt());
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a.SetTo(int.MinValue);
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Assert.IsTrue(a.FitsInt());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsInt());
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}
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}
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[TestMethod]
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public void IntFitsUshort()
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{
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using (var a = new HugeInt(ushort.MaxValue))
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{
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Assert.IsTrue(a.FitsUshort());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsUshort());
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a.SetTo(0);
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Assert.IsTrue(a.FitsUshort());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsUshort());
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}
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}
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[TestMethod]
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public void IntFitsShort()
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{
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using (var a = new HugeInt(short.MaxValue))
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{
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Assert.IsTrue(a.FitsShort());
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a.Value = a + 1;
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Assert.IsFalse(a.FitsShort());
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a.SetTo(short.MinValue);
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Assert.IsTrue(a.FitsShort());
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a.Value = a - 1;
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Assert.IsFalse(a.FitsShort());
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}
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}
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[TestMethod]
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public void IntApproximateSizeInBase()
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{
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using (var a = new HugeInt("2983475029834750293429834750298347502934298347502983475029342983475029834750293429834750298347502934"))
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{
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AssertEither(100, 101, a.ApproximateSizeInBase(10));
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AssertEither(331, 331, a.ApproximateSizeInBase(2));
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AssertEither(83, 83, a.ApproximateSizeInBase(16));
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AssertEither(64, 65, a.ApproximateSizeInBase(36));
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AssertEither(56, 57, a.ApproximateSizeInBase(62));
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}
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}
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private void AssertEither(int expected1, int expected2, long actual)
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{
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Assert.IsTrue(actual == expected1 || actual == expected2, "Expected {0} or {1}, actual {2}", expected1, expected2, actual);
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}
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}
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}
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