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/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
  20 namespace base {
  21
  22 TEST(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