diff --git a/ppapi/tests/test_flash_file.cc b/ppapi/tests/test_flash_file.cc
new file mode 100644
index 0000000..b7baeae
--- /dev/null
+++ b/ppapi/tests/test_flash_file.cc
@@ -0,0 +1,133 @@
+// Copyright (c) 2012 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 "ppapi/tests/test_flash_file.h"
+
+#include "ppapi/cpp/module.h"
+#include "ppapi/tests/testing_instance.h"
+#include "ppapi/tests/test_utils.h"
+
+#if defined(PPAPI_OS_WIN)
+#include <windows.h>
+#else
+#include <errno.h>
+#include <unistd.h>
+#endif
+
+namespace {
+
+void CloseFileHandle(PP_FileHandle file_handle) {
+#if defined(PPAPI_OS_WIN)
+  CloseHandle(file_handle);
+#else
+  close(file_handle);
+#endif
+}
+
+bool WriteFile(PP_FileHandle file_handle, const std::string& contents) {
+#if defined(PPAPI_OS_WIN)
+  DWORD bytes_written = 0;
+  BOOL result = ::WriteFile(file_handle, contents.c_str(), contents.size(),
+                            &bytes_written, NULL);
+  return result && bytes_written == static_cast<DWORD>(contents.size());
+#else
+  ssize_t bytes_written = 0;
+  do {
+    bytes_written = write(file_handle, contents.c_str(), contents.size());
+  } while (bytes_written == -1 && errno == EINTR);
+  return bytes_written == static_cast<ssize_t>(contents.size());
+#endif
+}
+
+bool ReadFile(PP_FileHandle file_handle, std::string* contents) {
+  static const size_t kBufferSize = 1024;
+  char* buffer = new char[kBufferSize];
+  bool result = false;
+  contents->clear();
+
+#if defined(PPAPI_OS_WIN)
+  SetFilePointer(file_handle, 0, NULL, FILE_BEGIN);
+  DWORD bytes_read = 0;
+  do {
+    result = !!::ReadFile(file_handle, buffer, kBufferSize, &bytes_read, NULL);
+    if (result && bytes_read > 0)
+      contents->append(buffer, bytes_read);
+  } while (result && bytes_read > 0);
+#else
+  lseek(file_handle, 0, SEEK_SET);
+  ssize_t bytes_read = 0;
+  do {
+    do {
+      bytes_read = read(file_handle, buffer, kBufferSize);
+    } while (bytes_read == -1 && errno == EINTR);
+    result = bytes_read != -1;
+    if (bytes_read > 0)
+      contents->append(buffer, bytes_read);
+  } while (bytes_read > 0);
+#endif
+
+  delete[] buffer;
+  return result;
+}
+
+}  // namespace
+
+REGISTER_TEST_CASE(FlashFile);
+
+TestFlashFile::TestFlashFile(TestingInstance* instance)
+    : TestCase(instance), module_local_interface_(NULL) {
+}
+
+TestFlashFile::~TestFlashFile() {
+}
+
+bool TestFlashFile::Init() {
+  module_local_interface_ = static_cast<const PPB_Flash_File_ModuleLocal*>(
+      pp::Module::Get()->GetBrowserInterface(
+          PPB_FLASH_FILE_MODULELOCAL_INTERFACE));
+  return !!module_local_interface_;
+}
+
+void TestFlashFile::RunTests(const std::string& filter) {
+  RUN_TEST(CreateTemporaryFile, filter);
+}
+
+std::string TestFlashFile::TestCreateTemporaryFile() {
+  // Make sure that the root directory exists.
+  module_local_interface_->CreateDir(instance_->pp_instance(), "");
+
+  int32_t before_create = 0;
+  ASSERT_SUBTEST_SUCCESS(GetItemCountUnderModuleLocalRoot(&before_create));
+
+  PP_FileHandle file_handle = PP_kInvalidFileHandle;
+  int32_t result = module_local_interface_->CreateTemporaryFile(
+      instance_->pp_instance(), &file_handle);
+  ASSERT_EQ(result, PP_OK);
+
+  std::string contents = "This is a temp file.";
+  ASSERT_TRUE(WriteFile(file_handle, contents));
+  std::string read_contents;
+  ASSERT_TRUE(ReadFile(file_handle, &read_contents));
+  ASSERT_EQ(contents, read_contents);
+
+  CloseFileHandle(file_handle);
+
+  int32_t after_close = 0;
+  ASSERT_SUBTEST_SUCCESS(GetItemCountUnderModuleLocalRoot(&after_close));
+  ASSERT_EQ(before_create, after_close);
+
+  PASS();
+}
+
+std::string TestFlashFile::GetItemCountUnderModuleLocalRoot(
+    int32_t* item_count) {
+  PP_DirContents_Dev* contents = NULL;
+  int32_t result = module_local_interface_->GetDirContents(
+      instance_->pp_instance(), "", &contents);
+  ASSERT_EQ(result, PP_OK);
+
+  *item_count = contents->count;
+  module_local_interface_->FreeDirContents(instance_->pp_instance(), contents);
+  PASS();
+}