Create ScopedTempDir, implement it on POSIX, and use it where appropriate.

util/test/scoped_temp_dir_test.cc

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "util/test/scoped_temp_dir.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "base/posix/eintr_wrapper.h"
+#include "gtest/gtest.h"
+#include "util/test/errors.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+bool FileExists(const base::FilePath& path) {
+#if defined(OS_POSIX)
+  struct stat st;
+  int rv = lstat(path.value().c_str(), &st);
+  if (rv < 0) {
+    EXPECT_EQ(ENOENT, errno) << ErrnoMessage("lstat") << " " << path.value();
+    return false;
+  }
+  return true;
+#else
+#error "Not implemented"
+#endif
+}
+
+void CreateFile(const base::FilePath& path) {
+#if defined(OS_POSIX)
+  int fd = HANDLE_EINTR(creat(path.value().c_str(), 0644));
+  ASSERT_GE(fd, 0) << ErrnoMessage("creat") << " " << path.value();
+  ASSERT_EQ(0, IGNORE_EINTR(close(fd)))
+      << ErrnoMessage("close") << " " << path.value();
+#else
+#error "Not implemented"
+#endif
+  EXPECT_TRUE(FileExists(path));
+}
+
+void CreateDirectory(const base::FilePath& path) {
+#if defined(OS_POSIX)
+  ASSERT_EQ(0, mkdir(path.value().c_str(), 0755))
+      << ErrnoMessage("mkdir") << " " << path.value();
+#else
+#error "Not implemented"
+#endif
+  ASSERT_TRUE(FileExists(path));
+}
+
+TEST(ScopedTempDir, Empty) {
+  base::FilePath path;
+  {
+    ScopedTempDir dir;
+    path = dir.path();
+    EXPECT_TRUE(FileExists(path));
+  }
+  EXPECT_FALSE(FileExists(path));
+}
+
+TEST(ScopedTempDir, WithTwoFiles) {
+  base::FilePath parent, file1, file2;
+
+  {
+    ScopedTempDir dir;
+    parent = dir.path();
+    ASSERT_TRUE(FileExists(parent));
+
+    file1 = parent.Append("test1");
+    CreateFile(file1);
+
+    file2 = parent.Append("test 2");
+    CreateFile(file2);
+  }
+
+  EXPECT_FALSE(FileExists(file1));
+  EXPECT_FALSE(FileExists(file2));
+  EXPECT_FALSE(FileExists(parent));
+}
+
+TEST(ScopedTempDir, WithRecursiveDirectory) {
+  base::FilePath parent, file1, child_dir, file2;
+
+  {
+    ScopedTempDir dir;
+    parent = dir.path();
+    ASSERT_TRUE(FileExists(parent));
+
+    file1 = parent.Append(".first-level file");
+    CreateFile(file1);
+
+    child_dir = parent.Append("subdir");
+    CreateDirectory(child_dir);
+
+    file2 = child_dir.Append("second level file");
+    CreateFile(file2);
+  }
+
+  EXPECT_FALSE(FileExists(file1));
+  EXPECT_FALSE(FileExists(file2));
+  EXPECT_FALSE(FileExists(child_dir));
+  EXPECT_FALSE(FileExists(parent));
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad