dir_reader_posix_unittest.cc revision c407dc5cd9bdc5668497f21b26b09d988ab439de 
1// Copyright (c) 2010 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/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
16using base::DirReaderPosix;
17
18namespace {
19typedef testing::Test DirReaderPosixUnittest;
20
21TEST(DirReaderPosixUnittest, Read) {
22  static const unsigned kNumFiles = 100;
23
24  if (DirReaderPosix::IsFallback())
25    return;
26
27  char kDirTemplate[] = "/tmp/org.chromium.dir-reader-posix-XXXXXX";
28  const char* dir = mkdtemp(kDirTemplate);
29  CHECK(dir);
30
31  const int prev_wd = open(".", O_RDONLY | O_DIRECTORY);
32  CHECK_GE(prev_wd, 0);
33
34  PCHECK(chdir(dir) == 0);
35
36  for (unsigned i = 0; i < kNumFiles; i++) {
37    char buf[16];
38    snprintf(buf, sizeof(buf), "%d", i);
39    const int fd = open(buf, O_CREAT | O_RDONLY | O_EXCL, 0600);
40    PCHECK(fd >= 0);
41    PCHECK(close(fd) == 0);
42  }
43
44  std::set<unsigned> seen;
45
46  DirReaderPosix reader(dir);
47  EXPECT_TRUE(reader.IsValid());
48
49  if (!reader.IsValid())
50    return;
51
52  bool seen_dot = false, seen_dotdot = false;
53
54  for (; reader.Next(); ) {
55    if (strcmp(reader.name(), ".") == 0) {
56      seen_dot = true;
57      continue;
58    }
59    if (strcmp(reader.name(), "..") == 0) {
60      seen_dotdot = true;
61      continue;
62    }
63
64    SCOPED_TRACE(testing::Message() << "reader.name(): " << reader.name());
65
66    char *endptr;
67    const unsigned long value = strtoul(reader.name(), &endptr, 10);
68
69    EXPECT_FALSE(*endptr);
70    EXPECT_LT(value, kNumFiles);
71    EXPECT_EQ(0u, seen.count(value));
72    seen.insert(value);
73  }
74
75  for (unsigned i = 0; i < kNumFiles; i++) {
76    char buf[16];
77    snprintf(buf, sizeof(buf), "%d", i);
78    PCHECK(unlink(buf) == 0);
79  }
80
81  PCHECK(rmdir(dir) == 0);
82
83  PCHECK(fchdir(prev_wd) == 0);
84  PCHECK(close(prev_wd) == 0);
85
86  EXPECT_TRUE(seen_dot);
87  EXPECT_TRUE(seen_dotdot);
88  EXPECT_EQ(kNumFiles, seen.size());
89}
90
91}  // anonymous namespace
92