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// ObjectTest.cs - NUnit Test Cases for the System.Object struct
//
// David Brandt (bucky@keystreams.com)
//
// (C) Ximian, Inc. http://www.ximian.com
//
using NUnit.Framework;
using System;
using System.Globalization;
namespace MonoTests.System
{
[TestFixture]
public class ObjectTest
{
public ObjectTest() {}
[Test]
public void TestCtor() {
Object o = new Object();
Assert.IsNotNull(o, "Can I at least get an _Object_, please?");
}
[Test]
public void TestEquals1() {
{
Object x = new Object();
Object y = new Object();
Assert.IsTrue(x.Equals(x), "Object should equal itself");
Assert.IsTrue(!x.Equals(null), "object should not equal null");
Assert.IsTrue(!x.Equals(y), "Different objects should not equal 1");
Assert.IsTrue(!y.Equals(x), "Different objects should not equal 2");
}
{
double x = Double.NaN;
double y = Double.NaN;
Assert.IsTrue(((Object)x).Equals(y), "NaNs should always equal each other");
}
}
[Test]
public void TestEquals2() {
{
Object x = new Object();
Object y = new Object();
Assert.IsTrue(Object.Equals(x,x), "Object should equal itself");
Assert.IsTrue(!Object.Equals(x,null), "object should not equal null");
Assert.IsTrue(!Object.Equals(null,x), "null should not equal object");
Assert.IsTrue(!Object.Equals(x,y), "Different objects should not equal 1");
Assert.IsTrue(!Object.Equals(y,x), "Different objects should not equal 2");
Assert.IsTrue(Object.Equals(null,null), "null should equal null");
}
{
double x = Double.NaN;
double y = Double.NaN;
Assert.IsTrue(Object.Equals(x,y), "NaNs should always equal each other");
}
}
[Test]
public void TestGetHashCode() {
Object x = new Object();
Assert.AreEqual(x.GetHashCode(), x.GetHashCode(), "Object's hash code should not change");
}
[Test]
public void TestGetType() {
Object x = new Object();
Assert.IsNotNull(x.GetType(), "Should get a type for Object");
Assert.AreEqual(x.GetType().ToString(), "System.Object", "Bad name for Object type");
}
[Test]
public void TestReferenceEquals() {
Object x = new Object();
Object y = new Object();
Assert.IsTrue(Object.ReferenceEquals(x,x), "Object should equal itself");
Assert.IsTrue(!Object.ReferenceEquals(x,null), "object should not equal null");
Assert.IsTrue(!Object.ReferenceEquals(null,x), "null should not equal object");
Assert.IsTrue(!Object.ReferenceEquals(x,y), "Different objects should not equal 1");
Assert.IsTrue(!Object.ReferenceEquals(y,x), "Different objects should not equal 2");
Assert.IsTrue(Object.ReferenceEquals(null,null), "null should not equal null");
}
[Test]
public void TestToString() {
Object x = new Object();
Object y = new Object();
Assert.AreEqual(x.ToString(), y.ToString(), "All Objects should have same string rep");
}
#if NET_2_0
class Foo<T> {}
[Test]
public void TestToStringOnGenericInstances ()
{
Foo<Object> foo = new Foo<Object> ();
Assert.AreEqual ("MonoTests.System.ObjectTest+Foo`1[System.Object]", foo.ToString (), "Bad ToString of generic instance");
}
#endif
}
}
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