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//
// System.SingleTest.cs - Unit test for Single
// adapted from a subset of DoubleTest.cs
//
// Authors
// Bob Doan <bdoan@sicompos.com>
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
using System;
using System.Globalization;
using System.Threading;
using NUnit.Framework;
namespace MonoTests.System
{
[TestFixture]
public class SingleTest
{
CultureInfo old_culture;
[SetUp]
public void SetUp ()
{
old_culture = Thread.CurrentThread.CurrentCulture;
Thread.CurrentThread.CurrentCulture = new CultureInfo ("en-US", false);
}
[TearDown]
public void TearDown ()
{
Thread.CurrentThread.CurrentCulture = old_culture;
}
[Test]
public void Equals ()
{
Single s1 = 1f;
Single s2 = 1f;
Assert.IsTrue (s1.Equals (s2), "Equals s1==s2");
Assert.IsTrue (!s1.Equals (Single.NaN), "Equals s1!=NaN");
Assert.IsTrue (!Single.NaN.Equals (s2), "Equals NaN=!s2");
Assert.IsTrue (Single.NaN.Equals (Single.NaN), "Equals NaN==NaN");
Single p0 = 0.0f;
Single m0 = -0.0f;
Assert.IsTrue (p0.Equals (m0), "0.0==-0.0");
Assert.IsTrue (m0.Equals (p0), "-0.0==0.0");
}
[Test]
public void IsInfinity ()
{
Assert.IsTrue ( Single.IsInfinity (Single.PositiveInfinity), "PositiveInfinity");
Assert.IsTrue (Single.IsInfinity (Single.NegativeInfinity), "NegativeInfinity");
Assert.IsTrue (!Single.IsInfinity(12), "12");
Assert.IsTrue (!Single.IsInfinity (Single.NaN), "NaN");
}
[Test]
public void IsNan ()
{
Assert.IsTrue (Single.IsNaN (Single.NaN), "Nan");
Assert.IsTrue (!Single.IsNaN (12), "12");
Assert.IsTrue (!Single.IsNaN (Single.PositiveInfinity), "PositiveInfinity");
Assert.IsTrue (!Single.IsNaN (Single.PositiveInfinity), "NegativeInfinity");
}
[Test]
public void IsNegativeInfinity ()
{
Assert.IsTrue (Single.IsNegativeInfinity (Single.NegativeInfinity), "IsNegativeInfinity");
Assert.IsTrue (!Single.IsNegativeInfinity (12), "12");
Assert.IsTrue (!Single.IsNegativeInfinity (Single.NaN), "NaN");
}
[Test]
public void IsPositiveInfinity ()
{
Assert.IsTrue (Single.IsPositiveInfinity (Single.PositiveInfinity), "PositiveInfinity");
Assert.IsTrue (!Single.IsPositiveInfinity (12), "12");
Assert.IsTrue (!Single.IsPositiveInfinity (Single.NaN), "NaN");
}
[Test]
public void ToString_Defaults ()
{
Single i = 254.9f;
// everything defaults to "G"
string def = i.ToString ("G");
Assert.AreEqual (def, i.ToString (), "ToString()");
Assert.AreEqual (def, i.ToString ((IFormatProvider)null), "ToString((IFormatProvider)null)");
Assert.AreEqual (def, i.ToString ((string)null), "ToString((string)null)");
Assert.AreEqual (def, i.ToString (String.Empty), "ToString(empty)");
Assert.AreEqual (def, i.ToString (null, null), "ToString(null,null)");
Assert.AreEqual (def, i.ToString (String.Empty, null), "ToString(empty,null)");
Assert.AreEqual ("254.9", def, "ToString(G)");
}
[Test]
public void ToString_Roundtrip ()
{
Assert.AreEqual (10.78f.ToString ("R", NumberFormatInfo.InvariantInfo), "10.78");
}
[Test]
public void Parse_Roundtrip ()
{
string maxVal = float.MaxValue.ToString ("r");
string minVal = float.MinValue.ToString ("r");
string epsilon = float.Epsilon.ToString ("r");
string nan = float.NaN.ToString ("r");
string negInf = float.NegativeInfinity.ToString ("r");
string posInf = float.PositiveInfinity.ToString ("r");
float result;
Assert.IsTrue (float.TryParse (maxVal, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "MaxValue#1a");
Assert.AreEqual (float.MaxValue, result, "MaxValue#1b");
Assert.IsTrue (float.TryParse (minVal, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "MinValue#1a");
Assert.AreEqual (float.MinValue, result, "MinValue#1b");
Assert.IsTrue (float.TryParse (epsilon, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "Epsilon#1a");
Assert.AreEqual (float.Epsilon, result, "Epsilon#1b");
Assert.IsTrue (float.TryParse (nan, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "NaN#1a");
Assert.AreEqual (float.NaN, result, "NaN#1b");
Assert.IsNaN (result, "NaN#1c");
Assert.IsTrue (float.TryParse (negInf, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "-Inf#1a");
Assert.AreEqual (float.NegativeInfinity, result, "-Inf#1b");
Assert.IsTrue (float.TryParse (posInf, NumberStyles.Float, CultureInfo.InvariantCulture, out result), "+Inf#1a");
Assert.AreEqual (float.PositiveInfinity, result, "+Inf#1b");
Assert.AreEqual (float.MaxValue, float.Parse (maxVal), "MaxValue#2");
Assert.AreEqual (float.MinValue, float.Parse (minVal), "MinValue#2");
Assert.AreEqual (float.Epsilon, float.Parse (epsilon), "Epsilon#2");
Assert.AreEqual (float.NaN, float.Parse (nan), "NaN#2a");
Assert.IsNaN (float.Parse (nan), "NaN#2b");
Assert.AreEqual (float.NegativeInfinity, float.Parse (negInf), "-Inf#2");
Assert.AreEqual (float.PositiveInfinity, float.Parse (posInf), "+Inf#2");
Assert.AreEqual (float.MaxValue, float.Parse (maxVal, CultureInfo.InvariantCulture), "MaxValue#3");
Assert.AreEqual (float.MinValue, float.Parse (minVal, CultureInfo.InvariantCulture), "MinValue#3");
Assert.AreEqual (float.Epsilon, float.Parse (epsilon, CultureInfo.InvariantCulture), "Epsilon#3");
Assert.AreEqual (float.NaN, float.Parse (nan, CultureInfo.InvariantCulture), "NaN#3a");
Assert.IsNaN (float.Parse (nan, CultureInfo.InvariantCulture), "NaN#3b");
Assert.AreEqual (float.NegativeInfinity, float.Parse (negInf, CultureInfo.InvariantCulture), "-Inf#3");
Assert.AreEqual (float.PositiveInfinity, float.Parse (posInf, CultureInfo.InvariantCulture), "+Inf#3");
Assert.AreEqual (float.MaxValue, float.Parse (maxVal, NumberStyles.Float), "MaxValue#4");
Assert.AreEqual (float.MinValue, float.Parse (minVal, NumberStyles.Float), "MinValue#4");
Assert.AreEqual (float.Epsilon, float.Parse (epsilon, NumberStyles.Float), "Epsilon#4");
Assert.AreEqual (float.NaN, float.Parse (nan, NumberStyles.Float), "NaN#4a");
Assert.IsNaN (float.Parse (nan, NumberStyles.Float), "NaN#4b");
Assert.AreEqual (float.NegativeInfinity, float.Parse (negInf, NumberStyles.Float), "-Inf#4");
Assert.AreEqual (float.PositiveInfinity, float.Parse (posInf, NumberStyles.Float), "+Inf#4");
Assert.AreEqual (float.MaxValue, float.Parse (maxVal, NumberStyles.Float, CultureInfo.InvariantCulture), "MaxValue#5");
Assert.AreEqual (float.MinValue, float.Parse (minVal, NumberStyles.Float, CultureInfo.InvariantCulture), "MinValue#5");
Assert.AreEqual (float.Epsilon, float.Parse (epsilon, NumberStyles.Float, CultureInfo.InvariantCulture), "Epsilon#5");
Assert.AreEqual (float.NaN, float.Parse (nan, NumberStyles.Float, CultureInfo.InvariantCulture), "NaN#5a");
Assert.IsNaN (float.Parse (nan, NumberStyles.Float, CultureInfo.InvariantCulture), "NaN#5b");
Assert.AreEqual (float.NegativeInfinity, float.Parse (negInf, NumberStyles.Float, CultureInfo.InvariantCulture), "-Inf#5");
Assert.AreEqual (float.PositiveInfinity, float.Parse (posInf, NumberStyles.Float, CultureInfo.InvariantCulture), "+Inf#5");
}
#if NET_2_0
[Test] // bug #72221
[ExpectedException (typeof (ArgumentException))]
public void HexNumber_WithHexToParse ()
{
float f;
Single.TryParse ("0dead", NumberStyles.HexNumber, null, out f);
}
[Test]
[ExpectedException (typeof (ArgumentException))]
public void HexNumber_NoHexToParse ()
{
float f;
Single.TryParse ("0", NumberStyles.HexNumber, null, out f);
}
#endif
}
}
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