Move dir_reader to base/files

base/dir_reader_posix_unittest.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/dir_reader_posix.h"
-
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "base/logging.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-#if defined(OS_ANDROID)
-#include "base/os_compat_android.h"
-#endif
-
-namespace base {
-
-TEST(DirReaderPosixUnittest, Read) {
-  static const unsigned kNumFiles = 100;
-
-  if (DirReaderPosix::IsFallback())
-    return;
-
-  char kDirTemplate[] = "/tmp/org.chromium.dir-reader-posix-XXXXXX";
-  const char* dir = mkdtemp(kDirTemplate);
-  ASSERT_TRUE(dir);
-
-  const int prev_wd = open(".", O_RDONLY | O_DIRECTORY);
-  DCHECK_GE(prev_wd, 0);
-
-  PCHECK(chdir(dir) == 0);
-
-  for (unsigned i = 0; i < kNumFiles; i++) {
-    char buf[16];
-    snprintf(buf, sizeof(buf), "%d", i);
-    const int fd = open(buf, O_CREAT | O_RDONLY | O_EXCL, 0600);
-    PCHECK(fd >= 0);
-    PCHECK(close(fd) == 0);
-  }
-
-  std::set<unsigned> seen;
-
-  DirReaderPosix reader(dir);
-  EXPECT_TRUE(reader.IsValid());
-
-  if (!reader.IsValid())
-    return;
-
-  bool seen_dot = false, seen_dotdot = false;
-
-  for (; reader.Next(); ) {
-    if (strcmp(reader.name(), ".") == 0) {
-      seen_dot = true;
-      continue;
-    }
-    if (strcmp(reader.name(), "..") == 0) {
-      seen_dotdot = true;
-      continue;
-    }
-
-    SCOPED_TRACE(testing::Message() << "reader.name(): " << reader.name());
-
-    char *endptr;
-    const unsigned long value = strtoul(reader.name(), &endptr, 10);
-
-    EXPECT_FALSE(*endptr);
-    EXPECT_LT(value, kNumFiles);
-    EXPECT_EQ(0u, seen.count(value));
-    seen.insert(value);
-  }
-
-  for (unsigned i = 0; i < kNumFiles; i++) {
-    char buf[16];
-    snprintf(buf, sizeof(buf), "%d", i);
-    PCHECK(unlink(buf) == 0);
-  }
-
-  PCHECK(rmdir(dir) == 0);
-
-  PCHECK(fchdir(prev_wd) == 0);
-  PCHECK(close(prev_wd) == 0);
-
-  EXPECT_TRUE(seen_dot);
-  EXPECT_TRUE(seen_dotdot);
-  EXPECT_EQ(kNumFiles, seen.size());
-}
-
-}  // namespace base