Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 75 insertions, 0 deletions

diff --git a/base/linuxfdwalk_unittest.cc b/base/linuxfdwalk_unittest.cc
new file mode 100644
index 00000000..bba48e88
--- /dev/null
+++ b/base/linuxfdwalk_unittest.cc
@@ -0,0 +1,75 @@
+/*
+ *  Copyright 2009 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <set>
+#include <sstream>
+
+#include "webrtc/base/gunit.h"
+#include "webrtc/base/linuxfdwalk.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static const int kArbitraryLargeFdNumber = 424;
+
+static void FdCheckVisitor(void *data, int fd) {
+  std::set<int> *fds = static_cast<std::set<int> *>(data);
+  EXPECT_EQ(1U, fds->erase(fd));
+}
+
+static void FdEnumVisitor(void *data, int fd) {
+  std::set<int> *fds = static_cast<std::set<int> *>(data);
+  EXPECT_TRUE(fds->insert(fd).second);
+}
+
+// Checks that the set of open fds is exactly the given list.
+static void CheckOpenFdList(std::set<int> fds) {
+  EXPECT_EQ(0, fdwalk(&FdCheckVisitor, &fds));
+  EXPECT_EQ(0U, fds.size());
+}
+
+static void GetOpenFdList(std::set<int> *fds) {
+  fds->clear();
+  EXPECT_EQ(0, fdwalk(&FdEnumVisitor, fds));
+}
+
+TEST(LinuxFdWalk, TestFdWalk) {
+  std::set<int> fds;
+  GetOpenFdList(&fds);
+  std::ostringstream str;
+  // I have observed that the open set when starting a test is [0, 6]. Leaked
+  // fds would change that, but so can (e.g.) running under a debugger, so we
+  // can't really do an EXPECT. :(
+  str << "File descriptors open in test executable:";
+  for (std::set<int>::const_iterator i = fds.begin(); i != fds.end(); ++i) {
+    str << " " << *i;
+  }
+  LOG(LS_INFO) << str.str();
+  // Open some files.
+  int fd1 = open("/dev/null", O_RDONLY);
+  EXPECT_LE(0, fd1);
+  int fd2 = open("/dev/null", O_WRONLY);
+  EXPECT_LE(0, fd2);
+  int fd3 = open("/dev/null", O_RDWR);
+  EXPECT_LE(0, fd3);
+  int fd4 = dup2(fd3, kArbitraryLargeFdNumber);
+  EXPECT_LE(0, fd4);
+  EXPECT_TRUE(fds.insert(fd1).second);
+  EXPECT_TRUE(fds.insert(fd2).second);
+  EXPECT_TRUE(fds.insert(fd3).second);
+  EXPECT_TRUE(fds.insert(fd4).second);
+  CheckOpenFdList(fds);
+  EXPECT_EQ(0, close(fd1));
+  EXPECT_EQ(0, close(fd2));
+  EXPECT_EQ(0, close(fd3));
+  EXPECT_EQ(0, close(fd4));
+}