Float conversion tests
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Alex Dyachenko
parent
d74453427c
commit
a82fecf846
@ -97,6 +97,9 @@
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<Compile Include="..\..\..\mpir.net\mpir.net-tests\HugeFloatTests\ConstructionAndDisposal.cs">
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<Link>HugeFloatTests\ConstructionAndDisposal.cs</Link>
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</Compile>
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<Compile Include="..\..\..\mpir.net\mpir.net-tests\HugeFloatTests\Conversions.cs">
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<Link>HugeFloatTests\Conversions.cs</Link>
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</Compile>
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<Compile Include="..\..\..\mpir.net\mpir.net-tests\HugeIntTests\Arithmetic.cs">
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<Link>HugeIntTests\Arithmetic.cs</Link>
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</Compile>
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@ -121,6 +121,24 @@ namespace MPIR.Tests.HugeFloatTests
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}
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}
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[TestMethod]
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public void FloatDefaultConstructorHigherPrecision()
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{
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var oldPrecision = HugeFloat.DefaultPrecision;
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HugeFloat.DefaultPrecision = 256;
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using (var a = new HugeFloat())
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{
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Assert.AreEqual(5, a.NumberOfLimbsAllocated());
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Assert.AreEqual(0, a.NumberOfLimbsUsed());
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Assert.AreEqual("0", a.ToString());
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var n = "2340958273409578234534534534523425343409582587";
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a.SetTo(n);
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Assert.AreEqual("0." + n + "@" + n.Length, a.ToString());
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}
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HugeFloat.DefaultPrecision = oldPrecision;
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}
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[TestMethod]
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public void FloatStringConstructor()
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{
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@ -21,83 +21,72 @@ 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.HugeRationalTests
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namespace MPIR.Tests.HugeFloatTests
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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 RationalToStringDecimal()
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public void FloatToStringDecimal()
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{
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var n = "-23429384756298357462983476598345623984756";
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var d = "115756986668303657898962467957";
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var s = n + "/" + d;
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using (var a = new HugeRational(s))
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var n = "-0.23429384756298357462@177";
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using (var a = new HugeFloat(n))
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{
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Assert.AreEqual(s, a.ToString());
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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 RationalToStringHex()
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public void FloatToStringHex()
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{
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var n = "-23429abcdef298357462983fedcba345623984756";
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var d = "17607ef654eb9a13ffa163c75";
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var s = n + "/" + d;
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using (var a = new HugeRational(s, 16))
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var n = "-0.23429abcdef2983574@9";
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using (var a = new HugeFloat(n, 16))
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{
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Assert.AreEqual(s, a.ToString(16, true));
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Assert.AreEqual(s.ToUpper(), a.ToString(16));
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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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[TestMethod]
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public void RationalFromUlong()
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public void FloatFromUlong()
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{
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using (var a = new HugeRational())
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using (var a = new HugeFloat())
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{
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ulong b = 0xF84739ABCDEF4876;
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ulong d = 12764787846358441471;
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a.SetTo(b, d);
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Assert.AreEqual(b.ToString() + "/" + d.ToString(), a.ToString());
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a.SetTo(b);
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Assert.AreEqual(b.ToString() + "/1", a.ToString());
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Assert.AreEqual("0." + b.ToString() + "@" + b.ToString().Length, a.ToString());
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}
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}
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[TestMethod]
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public void RationalFromLong()
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public void FloatFromLong()
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{
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using (var a = new HugeRational())
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using (var a = new HugeFloat())
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{
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long b = -0x784739ABCDEF4876;
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ulong d = 12764787846358441471;
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a.SetTo(b, d);
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Assert.AreEqual(b.ToString() + "/" + d.ToString(), a.ToString());
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a.SetTo(b);
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Assert.AreEqual(b.ToString() + "/1", a.ToString());
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Assert.AreEqual("-0." + (-b).ToString() + "@" + (-b).ToString().Length, a.ToString());
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}
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}
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[TestMethod]
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public void RationalToAndFromDouble()
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public void FloatToAndFromDouble()
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{
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using (var a = new HugeRational())
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using (var a = new HugeFloat())
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{
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a.SetTo(-123.25);
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double c = a.ToDouble();
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Assert.IsTrue(c.Equals(-123.25));
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Assert.IsTrue(a.Equals(-123.25));
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Assert.AreEqual("-0.12325@3", a.ToString());
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}
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}
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[TestMethod]
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public void RationalToAndFromFloat()
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public void FloatToAndFromFloat()
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{
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using (var a = new HugeRational())
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using (var a = new HugeFloat())
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{
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a.SetTo(-123.125f);
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@ -109,78 +98,47 @@ namespace MPIR.Tests.HugeRationalTests
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}
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[TestMethod]
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public void RationalFromString()
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public void FloatFromString()
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{
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using (var a = new HugeRational())
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using (var a = HugeFloat.Allocate(256))
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{
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var n = "98762934876529834765234123984761/115756986668303657898962467957";
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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 = "-98ABCDEF876529834765234123984761/17607EF654EB9A13FFA163C75";
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a.SetTo(n, 16);
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Assert.AreEqual(n, a.ToString(16));
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Assert.AreEqual("0." + n + "@" + n.Length, a.ToString());
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n = "-98ABCDEF876529834765234123984761";
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a.SetTo(n, 16);
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Assert.AreEqual(n + "/1", a.ToString(16));
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Assert.AreEqual("-0." + n.Substring(1) + "@" + (n.Length - 1), 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 RationalFromInvalidString()
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public void FloatFromInvalidString()
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{
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using (var a = new HugeRational())
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using (var a = new HugeFloat())
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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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[ExpectedException(typeof(ArgumentException))]
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public void RationalFromInvalidString2()
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public void FloatToStringTruncated()
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{
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using (var a = new HugeRational())
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var n = string.Concat("123456783".Select(c => new string(c, 30)));
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using (var a = HugeFloat.Allocate(2000))
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{
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a.SetTo("12345/13345A");
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a.SetTo(n);
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Assert.AreEqual("0." + n + "@" + n.Length, a.ToString(10));
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Assert.AreEqual("0." + n.Substring(0, 256) + "@" + n.Length, a.ToString());
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a.Value = -a;
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Assert.AreEqual("-0." + n.Substring(0, 256) + "@" + n.Length, a.ToString());
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}
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}
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[TestMethod]
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public void RationalToStringTruncated()
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{
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using (var d = new HugeInt("115756986668303657898962467957"))
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using (var e = new HugeInt(d ^ 10))
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{
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var s = e.ToString(10);
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var n = string.Concat("123456789".Select(c => new string(c, 30)));
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using (var a = new HugeRational(n + "/" + s))
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{
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Assert.AreEqual(n + "/" + s, a.ToString(10));
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Assert.AreEqual("..." + n.Substring(n.Length - 256) + "/..." + s.Substring(s.Length - 256), a.ToString());
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a.Value = -a;
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Assert.AreEqual("-..." + n.Substring(n.Length - 256) + "/..." + s.Substring(s.Length - 256), a.ToString());
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}
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}
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}
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[TestMethod]
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public void RationalApproximateSizeInBase()
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{
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using (var a = new HugeRational("2983475029834750293429834750298347502934298347502983475029342983475029834750293429834750298347502934/115756986668303657898962467957"))
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{
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AssertBetween(131, 133, a.ApproximateSizeInBase(10));
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AssertBetween(429, 429, a.ApproximateSizeInBase(2));
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AssertBetween(109, 109, a.ApproximateSizeInBase(16));
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AssertBetween(84, 86, a.ApproximateSizeInBase(36));
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AssertBetween(74, 76, a.ApproximateSizeInBase(62));
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}
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}
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private void AssertBetween(int min, int max, long actual)
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{
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Assert.IsTrue(actual >= min && actual <= max, "Expected {0} to {1}, actual {2}", min, max, actual);
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}
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//private void AssertBetween(int min, int max, long actual)
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//{
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// Assert.IsTrue(actual >= min && actual <= max, "Expected {0} to {1}, actual {2}", min, max, actual);
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//}
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}
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}
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@ -759,6 +759,21 @@ namespace MPIR
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public:
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#pragma region construction and disposal
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/// <summary>
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/// Gets or sets the default precision (in bits) assigned to new instances created with the default constructor
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/// </summary>
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static property mp_bitcnt_t DefaultPrecision
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{
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mp_bitcnt_t get()
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{
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return MP(get_default_prec)();
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}
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void set(mp_bitcnt_t value)
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{
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MP(set_default_prec)(value);
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}
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}
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/// <summary>
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/// Initializes a new float instance and sets its value to 0/1
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/// </summary>
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