1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/files/dir_reader_posix.h"
6
7#include <fcntl.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <unistd.h>
12
13#include "base/logging.h"
14#include "testing/gtest/include/gtest/gtest.h"
15
16#if defined(OS_ANDROID)
17#include "base/os_compat_android.h"
18#endif
19
20namespace base {
21
22TEST(DirReaderPosixUnittest, Read) {
23  static const unsigned kNumFiles = 100;
24
25  if (DirReaderPosix::IsFallback())
26    return;
27
28  char kDirTemplate[] = "/tmp/org.chromium.dir-reader-posix-XXXXXX";
29  const char* dir = mkdtemp(kDirTemplate);
30  ASSERT_TRUE(dir);
31
32  const int prev_wd = open(".", O_RDONLY | O_DIRECTORY);
33  DCHECK_GE(prev_wd, 0);
34
35  PCHECK(chdir(dir) == 0);
36
37  for (unsigned i = 0; i < kNumFiles; i++) {
38    char buf[16];
39    snprintf(buf, sizeof(buf), "%d", i);
40    const int fd = open(buf, O_CREAT | O_RDONLY | O_EXCL, 0600);
41    PCHECK(fd >= 0);
42    PCHECK(close(fd) == 0);
43  }
44
45  std::set<unsigned> seen;
46
47  DirReaderPosix reader(dir);
48  EXPECT_TRUE(reader.IsValid());
49
50  if (!reader.IsValid())
51    return;
52
53  bool seen_dot = false, seen_dotdot = false;
54
55  for (; reader.Next(); ) {
56    if (strcmp(reader.name(), ".") == 0) {
57      seen_dot = true;
58      continue;
59    }
60    if (strcmp(reader.name(), "..") == 0) {
61      seen_dotdot = true;
62      continue;
63    }
64
65    SCOPED_TRACE(testing::Message() << "reader.name(): " << reader.name());
66
67    char *endptr;
68    const unsigned long value = strtoul(reader.name(), &endptr, 10);
69
70    EXPECT_FALSE(*endptr);
71    EXPECT_LT(value, kNumFiles);
72    EXPECT_EQ(0u, seen.count(value));
73    seen.insert(value);
74  }
75
76  for (unsigned i = 0; i < kNumFiles; i++) {
77    char buf[16];
78    snprintf(buf, sizeof(buf), "%d", i);
79    PCHECK(unlink(buf) == 0);
80  }
81
82  PCHECK(rmdir(dir) == 0);
83
84  PCHECK(fchdir(prev_wd) == 0);
85  PCHECK(close(prev_wd) == 0);
86
87  EXPECT_TRUE(seen_dot);
88  EXPECT_TRUE(seen_dotdot);
89  EXPECT_EQ(kNumFiles, seen.size());
90}
91
92}  // namespace base
93