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
|
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "base/unix_file/null_file.h"
#include <errno.h>
#include "gtest/gtest.h"
namespace unix_file {
class NullFileTest : public testing::Test { };
TEST_F(NullFileTest, Read) {
NullFile f;
char buf[256];
// You can't read a negative number of bytes...
ASSERT_EQ(-EINVAL, f.Read(buf, 0, -1));
// ...but everything else is fine (though you'll get no data).
ASSERT_EQ(0, f.Read(buf, 128, 0));
ASSERT_EQ(0, f.Read(buf, 128, 128));
}
TEST_F(NullFileTest, SetLength) {
NullFile f;
// You can't set a negative length...
ASSERT_EQ(-EINVAL, f.SetLength(-1));
// ...but everything else is fine.
ASSERT_EQ(0, f.SetLength(0));
ASSERT_EQ(0, f.SetLength(128));
}
TEST_F(NullFileTest, GetLength) {
const std::string content("hello");
NullFile f;
// The length is always 0.
ASSERT_EQ(0, f.GetLength());
ASSERT_EQ(content.size(), static_cast<uint64_t>(f.Write(content.data(), content.size(), 0)));
ASSERT_EQ(0, f.GetLength());
}
TEST_F(NullFileTest, Write) {
const std::string content("hello");
NullFile f;
// You can't write at a negative offset...
ASSERT_EQ(-EINVAL, f.Write(content.data(), content.size(), -128));
// But you can write anywhere else...
ASSERT_EQ(content.size(), static_cast<uint64_t>(f.Write(content.data(), content.size(), 0)));
ASSERT_EQ(content.size(), static_cast<uint64_t>(f.Write(content.data(), content.size(), 128)));
// ...though the file will remain empty.
ASSERT_EQ(0, f.GetLength());
}
} // namespace unix_file
|
