1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.IO;
using System.Runtime.CompilerServices;
class ApplicationException : Exception
{
public ApplicationException(string message) : base(message) { }
}
namespace Test
{
public abstract class Base
{
public abstract string AbstractFinal();
public abstract string AbstractOverrideFinal();
public abstract string AbstractOverrideOverride();
public abstract string AbstractOverrideNil();
public virtual string VirtualFinal()
{
return "Base.VirtualFinal";
}
public virtual string VirtualNilFinal()
{
return "Base.VirtualNilFinal";
}
public virtual string VirtualOverrideFinal()
{
return "Base.VirtualOverrideFinal";
}
public virtual string VirtualNilOverride()
{
return "Base.VirtualNilOverride";
}
public virtual string VirtualNilNil()
{
return "Base.VirtualNilNil";
}
public virtual string VirtualOverrideOverride()
{
return "Base.VirtualOverrideOverride";
}
public virtual string VirtualOverrideNil()
{
return "Base.VirtualOverrideNil";
}
}
public class Child : Base
{
public sealed override string AbstractFinal()
{
return "Child.AbstractFinal";
}
public override string AbstractOverrideFinal()
{
return "Child.AbstractOverrideFinal";
}
public override string AbstractOverrideOverride()
{
return "Child.AbstractOverrideOverride";
}
public override string AbstractOverrideNil()
{
return "Child.AbstractOverrideNil";
}
public sealed override string VirtualFinal()
{
return "Child.VirtualFinal";
}
public override string VirtualOverrideFinal()
{
return "Child.VirtualOverrideFinal";
}
public override string VirtualOverrideOverride()
{
return "Child.VirtualOverrideOverride";
}
public override string VirtualOverrideNil()
{
return "Child.VirtualOverrideNil";
}
public void TestChild()
{
Console.WriteLine("Call from inside Child");
Assert.AreEqual("Child.AbstractFinal", AbstractFinal());
Assert.AreEqual("Child.AbstractOverrideFinal", AbstractOverrideFinal());
Assert.AreEqual("Child.AbstractOverrideOverride", AbstractOverrideOverride());
Assert.AreEqual("Child.AbstractOverrideNil", AbstractOverrideNil());
Assert.AreEqual("Base.VirtualFinal", base.VirtualFinal());
Assert.AreEqual("Child.VirtualFinal", VirtualFinal());
Assert.AreEqual("Base.VirtualOverrideFinal", base.VirtualOverrideFinal());
Assert.AreEqual("Child.VirtualOverrideFinal", VirtualOverrideFinal());
Assert.AreEqual("Base.VirtualOverrideOverride", base.VirtualOverrideOverride());
Assert.AreEqual("Child.VirtualOverrideOverride", VirtualOverrideOverride());
Assert.AreEqual("Base.VirtualOverrideNil", base.VirtualOverrideNil());
Assert.AreEqual("Child.VirtualOverrideNil", VirtualOverrideNil());
}
}
public class GrandChild : Child
{
public sealed override string AbstractOverrideFinal()
{
return "GrandChild.AbstractOverrideFinal";
}
public override string AbstractOverrideOverride()
{
return "GrandChild.AbstractOverrideOverride";
}
public sealed override string VirtualNilFinal()
{
return "GrandChild.VirtualNilFinal";
}
public sealed override string VirtualOverrideFinal()
{
return "GrandChild.VirtualOverrideFinal";
}
public override string VirtualOverrideOverride()
{
return "GrandChild.VirtualOverrideOverride";
}
public override string VirtualNilOverride()
{
return "GrandChild.VirtualNilOverride";
}
public void TestGrandChild()
{
Console.WriteLine("Call from inside GrandChild");
Assert.AreEqual("Child.AbstractFinal", base.AbstractFinal());
Assert.AreEqual("Child.AbstractFinal", AbstractFinal());
Assert.AreEqual("Child.AbstractOverrideFinal", base.AbstractOverrideFinal());
Assert.AreEqual("GrandChild.AbstractOverrideFinal", AbstractOverrideFinal());
Assert.AreEqual("Child.AbstractOverrideOverride", base.AbstractOverrideOverride());
Assert.AreEqual("GrandChild.AbstractOverrideOverride", AbstractOverrideOverride());
Assert.AreEqual("Child.AbstractOverrideNil", base.AbstractOverrideNil());
Assert.AreEqual("Child.AbstractOverrideNil", AbstractOverrideNil());
Assert.AreEqual("Child.VirtualFinal", base.VirtualFinal());
Assert.AreEqual("Child.VirtualFinal", VirtualFinal());
Assert.AreEqual("Child.VirtualOverrideFinal", base.VirtualOverrideFinal());
Assert.AreEqual("GrandChild.VirtualOverrideFinal", VirtualOverrideFinal());
Assert.AreEqual("Child.VirtualOverrideOverride", base.VirtualOverrideOverride());
Assert.AreEqual("GrandChild.VirtualOverrideOverride", VirtualOverrideOverride());
Assert.AreEqual("Child.VirtualOverrideNil", base.VirtualOverrideNil());
Assert.AreEqual("Child.VirtualOverrideNil", VirtualOverrideNil());
}
}
public sealed class SealedGrandChild : GrandChild
{ }
public static class Program
{
public static void CallSealedGrandChild()
{
Console.WriteLine("Call SealedGrandChild from outside");
// Calling methods of a sealed class from outside
SealedGrandChild o = new SealedGrandChild();
Assert.AreEqual("Child.AbstractFinal", o.AbstractFinal());
Assert.AreEqual("GrandChild.AbstractOverrideFinal", o.AbstractOverrideFinal());
Assert.AreEqual("GrandChild.AbstractOverrideOverride", o.AbstractOverrideOverride());
Assert.AreEqual("Child.AbstractOverrideNil", o.AbstractOverrideNil());
Assert.AreEqual("Child.VirtualFinal", o.VirtualFinal());
Assert.AreEqual("GrandChild.VirtualNilFinal", o.VirtualNilFinal());
Assert.AreEqual("GrandChild.VirtualOverrideFinal", o.VirtualOverrideFinal());
Assert.AreEqual("GrandChild.VirtualNilOverride", o.VirtualNilOverride());
Assert.AreEqual("Base.VirtualNilNil", o.VirtualNilNil());
Assert.AreEqual("GrandChild.VirtualOverrideOverride", o.VirtualOverrideOverride());
Assert.AreEqual("Child.VirtualOverrideNil", o.VirtualOverrideNil());
}
public static void CallFromInsideChild()
{
Child child = new Child();
child.TestChild();
}
public static void CallFromInsideGrandChild()
{
GrandChild child = new GrandChild();
child.TestGrandChild();
}
public static int Main(string[] args)
{
try
{
CallSealedGrandChild();
CallFromInsideChild();
CallFromInsideGrandChild();
Console.WriteLine("Test SUCCESS");
return 100;
}
catch (Exception ex)
{
Console.WriteLine(ex);
Console.WriteLine("Test FAILED");
return 101;
}
}
}
public static class Assert
{
public static void AreEqual(string left, string right)
{
if (String.IsNullOrEmpty(left))
throw new ArgumentNullException("left");
if (string.IsNullOrEmpty(right))
throw new ArgumentNullException("right");
if (left != right)
{
string message = String.Format("[[{0}]] != [[{1}]]", left, right);
throw new ApplicationException(message);
}
}
}
}
|
