mcs/class/corlib/Test/System/SingleTest.cs

   1 //
   2 // System.SingleTest.cs - Unit test for Single
   3 //      adapted from a subset of DoubleTest.cs
   4 //
   5 // Authors
   6 //      Bob Doan  <bdoan@sicompos.com>
   7 //      Sebastien Pouliot  <sebastien@ximian.com>
   8 //
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  10 //
  11
  12 using System;
  13 using System.Globalization;
  14 using NUnit.Framework;
  15
  16 namespace MonoTests.System  {
  17
  18         [TestFixture]
  19         public class SingleTest : Assertion {
  20
  21                 [Test]
  22                 public void Equals ()
  23                 {
  24                         Single s1 = 1f;
  25                         Single s2 = 1f;
  26                         Assert ("Equals s1==s2", s1.Equals (s2));
  27                         Assert ("Equals s1!=NaN", !s1.Equals (Single.NaN));
  28
  29                         Assert ("Equals NaN=!s2", !Single.NaN.Equals (s2));
  30                         Assert ("Equals NaN==NaN", Single.NaN.Equals (Single.NaN));
  31
  32                         Single p0 = 0.0f;
  33                         Single m0 = -0.0f;
  34                         Assert ("0.0==-0.0", p0.Equals (m0));
  35                         Assert ("-0.0==0.0", m0.Equals (p0));
  36                 }
  37
  38                 [Test]
  39                 public void IsInfinity ()
  40                 {
  41                         Assert ("PositiveInfinity",  Single.IsInfinity (Single.PositiveInfinity));
  42                         Assert ("NegativeInfinity", Single.IsInfinity (Single.NegativeInfinity));
  43                         Assert ("12", !Single.IsInfinity(12));
  44                         Assert ("NaN", !Single.IsInfinity (Single.NaN));
  45                 }
  46
  47                 [Test]
  48                 public void IsNan ()
  49                 {
  50                         Assert ("Nan", Single.IsNaN (Single.NaN));
  51                         Assert ("12", !Single.IsNaN (12));
  52                         Assert ("PositiveInfinity", !Single.IsNaN (Single.PositiveInfinity));
  53                         Assert ("NegativeInfinity", !Single.IsNaN (Single.PositiveInfinity));
  54                 }
  55
  56                 [Test]
  57                 public void IsNegativeInfinity ()
  58                 {
  59                         Assert ("IsNegativeInfinity", Single.IsNegativeInfinity (Single.NegativeInfinity));
  60                         Assert ("12", !Single.IsNegativeInfinity (12));
  61                         Assert ("NaN", !Single.IsNegativeInfinity (Single.NaN));
  62                 }
  63
  64                 [Test]
  65                 public void IsPositiveInfinity ()
  66                 {
  67                         Assert ("PositiveInfinity", Single.IsPositiveInfinity (Single.PositiveInfinity));
  68                         Assert ("12", !Single.IsPositiveInfinity (12));
  69                         Assert ("NaN", !Single.IsPositiveInfinity (Single.NaN));
  70                 }
  71
  72                 [Test]
  73                 public void ToString_Defaults ()
  74                 {
  75                         Single i = 254.9f;
  76                         // everything defaults to "G"
  77                         string def = i.ToString ("G");
  78                         AssertEquals ("ToString()", def, i.ToString ());
  79                         AssertEquals ("ToString((IFormatProvider)null)", def, i.ToString ((IFormatProvider)null));
  80                         AssertEquals ("ToString((string)null)", def, i.ToString ((string)null));
  81                         AssertEquals ("ToString(empty)", def, i.ToString (String.Empty));
  82                         AssertEquals ("ToString(null,null)", def, i.ToString (null, null));
  83                         AssertEquals ("ToString(empty,null)", def, i.ToString (String.Empty, null));
  84
  85                         AssertEquals ("ToString(G)", "254.9", def);
  86                 }
  87
  88 #if NET_2_0
  89                 [Test]
  90                 [ExpectedException (typeof (ArgumentException))]
  91                 public void HexNumber_WithHexToParse ()
  92                 {
  93                         // from bug #72221
  94                         float f;
  95                         Single.TryParse ("0dead", NumberStyles.HexNumber, null, out f);
  96                 }
  97
  98                 [Test]
  99                 [ExpectedException (typeof (ArgumentException))]
 100                 public void HexNumber_NoHexToParse ()
 101                 {
 102                         float f;
 103                         Single.TryParse ("0", NumberStyles.HexNumber, null, out f);
 104                 }
 105 #endif
 106         }
 107 }