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

   1 // ObjectTest.cs - NUnit Test Cases for the System.Object struct
   2 //
   3 // David Brandt (bucky@keystreams.com)
   4 //
   5 // (C) Ximian, Inc.  http://www.ximian.com
   6 //
   7
   8 using NUnit.Framework;
   9 using System;
  10 using System.Globalization;
  11
  12 namespace MonoTests.System
  13 {
  14
  15 public class ObjectTest : TestCase
  16 {
  17         public ObjectTest() {}
  18
  19         protected override void SetUp()
  20         {
  21         }
  22
  23         protected override void TearDown()
  24         {
  25         }
  26
  27         public void TestCtor() {
  28                 Object o = new Object();
  29                 AssertNotNull("Can I at least get an _Object_, please?", o);
  30         }
  31
  32         public void TestEquals1() {
  33                 {
  34                         Object x = new Object();
  35                         Object y = new Object();
  36                         Assert("Object should equal itself",
  37                                x.Equals(x));
  38                         Assert("object should not equal null",
  39                                !x.Equals(null));
  40                         Assert("Different objects should not equal 1",
  41                                !x.Equals(y));
  42                         Assert("Different objects should not equal 2",
  43                                !y.Equals(x));
  44                 }
  45                 {
  46                         double x = Double.NaN;
  47                         double y = Double.NaN;
  48                         Assert("NaNs should always equal each other",
  49                                ((Object)x).Equals(y));
  50                 }
  51         }
  52         public void TestEquals2() {
  53                 {
  54                         Object x = new Object();
  55                         Object y = new Object();
  56                         Assert("Object should equal itself",
  57                                Object.Equals(x,x));
  58                         Assert("object should not equal null",
  59                                !Object.Equals(x,null));
  60                         Assert("null should not equal object",
  61                                !Object.Equals(null,x));
  62                         Assert("Different objects should not equal 1",
  63                                !Object.Equals(x,y));
  64                         Assert("Different objects should not equal 2",
  65                                !Object.Equals(y,x));
  66                         Assert("null should not equal null",
  67                                Object.Equals(null,null));
  68                 }
  69                 {
  70                         double x = Double.NaN;
  71                         double y = Double.NaN;
  72                         Assert("NaNs should always equal each other",
  73                                Object.Equals(x,y));
  74                 }
  75         }
  76
  77         public void TestGetHashCode() {
  78                 Object x = new Object();
  79                 AssertEquals("Object's hash code should not change",
  80                              x.GetHashCode(), x.GetHashCode());
  81         }
  82
  83         public void TestGetType() {
  84                 Object x = new Object();
  85                 AssertNotNull("Should get a type for Object", x.GetType());
  86                 AssertEquals("Bad name for Object type", "System.Object",
  87                              x.GetType().ToString());
  88         }
  89
  90         public void TestReferenceEquals() {
  91                 Object x = new Object();
  92                 Object y = new Object();
  93                 Assert("Object should equal itself",
  94                        Object.ReferenceEquals(x,x));
  95                 Assert("object should not equal null",
  96                        !Object.ReferenceEquals(x,null));
  97                 Assert("null should not equal object",
  98                        !Object.ReferenceEquals(null,x));
  99                 Assert("Different objects should not equal 1",
 100                        !Object.ReferenceEquals(x,y));
 101                 Assert("Different objects should not equal 2",
 102                        !Object.ReferenceEquals(y,x));
 103                 Assert("null should not equal null",
 104                        Object.ReferenceEquals(null,null));
 105         }
 106
 107         public void TestToString() {
 108                 Object x = new Object();
 109                 Object y = new Object();
 110                 AssertEquals("All Objects should have same string rep",
 111                              x.ToString(), y.ToString());
 112         }
 113 }
 114 }