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 Novell (http://www.novell.com)
  10 //
  11
  12 using System;
  13 using NUnit.Framework;
  14
  15 namespace MonoTests.System  {
  16
  17         [TestFixture]
  18         public class SingleTest : Assertion {
  19
  20                 [Test]
  21                 public void Equals ()
  22                 {
  23                         Single s1 = 1f;
  24                         Single s2 = 1f;
  25                         Assert ("Equals s1==s2", s1.Equals (s2));
  26                         Assert ("Equals s1!=NaN", !s1.Equals (Single.NaN));
  27
  28                         Assert ("Equals NaN=!s2", !Single.NaN.Equals (s2));
  29                         Assert ("Equals NaN==NaN", Single.NaN.Equals (Single.NaN));
  30
  31                         Single p0 = 0.0f;
  32                         Single m0 = -0.0f;
  33                         Assert ("0.0==-0.0", p0.Equals (m0));
  34                         Assert ("-0.0==0.0", m0.Equals (p0));
  35                 }
  36
  37                 [Test]
  38                 public void IsInfinity ()
  39                 {
  40                         Assert ("PositiveInfinity",  Single.IsInfinity (Single.PositiveInfinity));
  41                         Assert ("NegativeInfinity", Single.IsInfinity (Single.NegativeInfinity));
  42                         Assert ("12", !Single.IsInfinity(12));
  43                         Assert ("NaN", !Single.IsInfinity (Single.NaN));
  44                 }
  45
  46                 [Test]
  47                 public void IsNan ()
  48                 {
  49                         Assert ("Nan", Single.IsNaN (Single.NaN));
  50                         Assert ("12", !Single.IsNaN (12));
  51                         Assert ("PositiveInfinity", !Single.IsNaN (Single.PositiveInfinity));
  52                         Assert ("NegativeInfinity", !Single.IsNaN (Single.PositiveInfinity));
  53                 }
  54
  55                 [Test]
  56                 public void IsNegativeInfinity ()
  57                 {
  58                         Assert ("IsNegativeInfinity", Single.IsNegativeInfinity (Single.NegativeInfinity));
  59                         Assert ("12", !Single.IsNegativeInfinity (12));
  60                         Assert ("NaN", !Single.IsNegativeInfinity (Single.NaN));
  61                 }
  62
  63                 [Test]
  64                 public void IsPositiveInfinity ()
  65                 {
  66                         Assert ("PositiveInfinity", Single.IsPositiveInfinity (Single.PositiveInfinity));
  67                         Assert ("12", !Single.IsPositiveInfinity (12));
  68                         Assert ("NaN", !Single.IsPositiveInfinity (Single.NaN));
  69                 }
  70
  71                 [Test]
  72                 public void ToString_Defaults ()
  73                 {
  74                         Single i = 254.9f;
  75                         // everything defaults to "G"
  76                         string def = i.ToString ("G");
  77                         AssertEquals ("ToString()", def, i.ToString ());
  78                         AssertEquals ("ToString((IFormatProvider)null)", def, i.ToString ((IFormatProvider)null));
  79                         AssertEquals ("ToString((string)null)", def, i.ToString ((string)null));
  80                         AssertEquals ("ToString(empty)", def, i.ToString (String.Empty));
  81                         AssertEquals ("ToString(null,null)", def, i.ToString (null, null));
  82                         AssertEquals ("ToString(empty,null)", def, i.ToString (String.Empty, null));
  83
  84                         AssertEquals ("ToString(G)", "254.9", def);
  85                 }
  86         }
  87 }