base/files/dir_reader_posix_unittest.cc

   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/files/scoped_temp_dir.h"
  14 #include "base/logging.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 #if defined(OS_ANDROID)
  18 #include "base/os_compat_android.h"
  19 #endif
  20
  21 namespace base {
  22
  23 TEST(DirReaderPosixUnittest, Read) {
  24   static const unsigned kNumFiles = 100;
  25
  26   if (DirReaderPosix::IsFallback())
  27     return;
  28
  29   base::ScopedTempDir temp_dir;
  30   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
  31   const char* dir = temp_dir.path().value().c_str();
  32   ASSERT_TRUE(dir);
  33
  34   const int prev_wd = open(".", O_RDONLY | O_DIRECTORY);
  35   DCHECK_GE(prev_wd, 0);
  36
  37   PCHECK(chdir(dir) == 0);
  38
  39   for (unsigned i = 0; i < kNumFiles; i++) {
  40     char buf[16];
  41     snprintf(buf, sizeof(buf), "%d", i);
  42     const int fd = open(buf, O_CREAT | O_RDONLY | O_EXCL, 0600);
  43     PCHECK(fd >= 0);
  44     PCHECK(close(fd) == 0);
  45   }
  46
  47   std::set<unsigned> seen;
  48
  49   DirReaderPosix reader(dir);
  50   EXPECT_TRUE(reader.IsValid());
  51
  52   if (!reader.IsValid())
  53     return;
  54
  55   bool seen_dot = false, seen_dotdot = false;
  56
  57   for (; reader.Next(); ) {
  58     if (strcmp(reader.name(), ".") == 0) {
  59       seen_dot = true;
  60       continue;
  61     }
  62     if (strcmp(reader.name(), "..") == 0) {
  63       seen_dotdot = true;
  64       continue;
  65     }
  66
  67     SCOPED_TRACE(testing::Message() << "reader.name(): " << reader.name());
  68
  69     char *endptr;
  70     const unsigned long value = strtoul(reader.name(), &endptr, 10);
  71
  72     EXPECT_FALSE(*endptr);
  73     EXPECT_LT(value, kNumFiles);
  74     EXPECT_EQ(0u, seen.count(value));
  75     seen.insert(value);
  76   }
  77
  78   for (unsigned i = 0; i < kNumFiles; i++) {
  79     char buf[16];
  80     snprintf(buf, sizeof(buf), "%d", i);
  81     PCHECK(unlink(buf) == 0);
  82   }
  83
  84   PCHECK(rmdir(dir) == 0);
  85
  86   PCHECK(fchdir(prev_wd) == 0);
  87   PCHECK(close(prev_wd) == 0);
  88
  89   EXPECT_TRUE(seen_dot);
  90   EXPECT_TRUE(seen_dotdot);
  91   EXPECT_EQ(kNumFiles, seen.size());
  92 }
  93
  94 }  // namespace base