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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 
16 using base::DirReaderPosix;
17 
18 namespace {
19 typedef testing::Test DirReaderPosixUnittest;
20 
TEST(DirReaderPosixUnittest,Read)21 TEST(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