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
|
// 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 Xunit;
namespace System.MemoryTests
{
public static partial class MemoryTests
{
[Fact]
public static void TryCopyTo()
{
int[] src = { 1, 2, 3 };
int[] dst = { 99, 100, 101 };
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(dst);
Assert.True(success);
Assert.Equal<int>(src, dst);
}
[Fact]
public static void TryCopyToSingle()
{
int[] src = { 1 };
int[] dst = { 99 };
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(dst);
Assert.True(success);
Assert.Equal<int>(src, dst);
}
[Fact]
public static void TryCopyToArraySegmentImplicit()
{
int[] src = { 1, 2, 3 };
int[] dst = { 5, 99, 100, 101, 10 };
var segment = new ArraySegment<int>(dst, 1, 3);
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(segment);
Assert.True(success);
Assert.Equal<int>(src, segment);
}
[Fact]
public static void TryCopyToEmpty()
{
int[] src = { };
int[] dst = { 99, 100, 101 };
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(dst);
Assert.True(success);
int[] expected = { 99, 100, 101 };
Assert.Equal<int>(expected, dst);
}
[Fact]
public static void TryCopyToLonger()
{
int[] src = { 1, 2, 3 };
int[] dst = { 99, 100, 101, 102 };
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(dst);
Assert.True(success);
int[] expected = { 1, 2, 3, 102 };
Assert.Equal<int>(expected, dst);
}
[Fact]
public static void TryCopyToShorter()
{
int[] src = { 1, 2, 3 };
int[] dst = { 99, 100 };
Memory<int> srcMemory = src;
bool success = srcMemory.TryCopyTo(dst);
Assert.False(success);
int[] expected = { 99, 100 };
Assert.Equal<int>(expected, dst); // TryCopyTo() checks for sufficient space before doing any copying.
}
[Fact]
public static void CopyToShorter()
{
int[] src = { 1, 2, 3 };
int[] dst = { 99, 100 };
Memory<int> srcMemory = src;
Assert.Throws<ArgumentException>(() => srcMemory.CopyTo(dst));
int[] expected = { 99, 100 };
Assert.Equal<int>(expected, dst); // CopyTo() checks for sufficient space before doing any copying.
}
[Fact]
public static void Overlapping1()
{
int[] a = { 90, 91, 92, 93, 94, 95, 96, 97 };
var src = new Memory<int>(a, 1, 6);
var dst = new Memory<int>(a, 2, 6);
src.CopyTo(dst);
int[] expected = { 90, 91, 91, 92, 93, 94, 95, 96 };
Assert.Equal<int>(expected, a);
}
[Fact]
public static void Overlapping2()
{
int[] a = { 90, 91, 92, 93, 94, 95, 96, 97 };
var src = new Memory<int>(a, 2, 6);
var dst = new Memory<int>(a, 1, 6);
src.CopyTo(dst);
int[] expected = { 90, 92, 93, 94, 95, 96, 97, 97 };
Assert.Equal<int>(expected, a);
}
[Fact]
public static void CopyToArray()
{
int[] src = { 1, 2, 3 };
Memory<int> dst = new int[3] { 99, 100, 101 };
src.CopyTo(dst);
Assert.Equal<int>(src, dst.ToArray());
}
[Fact]
public static void CopyToSingleArray()
{
int[] src = { 1 };
Memory<int> dst = new int[1] { 99 };
src.CopyTo(dst);
Assert.Equal<int>(src, dst.ToArray());
}
[Fact]
public static void CopyToEmptyArray()
{
int[] src = { };
Memory<int> dst = new int[3] { 99, 100, 101 };
src.CopyTo(dst);
int[] expected = { 99, 100, 101 };
Assert.Equal<int>(expected, dst.ToArray());
Memory<int> dstEmpty = new int[0] { };
src.CopyTo(dstEmpty);
int[] expectedEmpty = { };
Assert.Equal<int>(expectedEmpty, dstEmpty.ToArray());
}
[Fact]
public static void CopyToLongerArray()
{
int[] src = { 1, 2, 3 };
Memory<int> dst = new int[4] { 99, 100, 101, 102 };
src.CopyTo(dst);
int[] expected = { 1, 2, 3, 102 };
Assert.Equal<int>(expected, dst.ToArray());
}
[Fact]
public static void CopyToShorterArray()
{
int[] src = { 1, 2, 3 };
Memory<int> dst = new int[2] { 99, 100 };
Assert.Throws<ArgumentException>(() => src.CopyTo(dst));
int[] expected = { 99, 100 };
Assert.Equal<int>(expected, dst.ToArray()); // CopyTo() checks for sufficient space before doing any copying.
}
[Fact]
public static void CopyToCovariantArray()
{
string[] src = new string[] { "Hello" };
Memory<object> dst = new object[] { "world" };
src.CopyTo<object>(dst);
Assert.Equal("Hello", dst.Span[0]);
}
}
}
|
