Extract two testing utilities to share them among the tests.

WriteStringToFile and CreateFileOfSpecifiedSize are common patterns.
This CL extracts them and share them among some tests.

BUG=127129
TEST=Ran unit_tests

Review URL: https://chromiumcodereview.appspot.com/14771006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@197683 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 24 insertions, 0 deletions

diff --git a/chrome/browser/google_apis/test_util.cc b/chrome/browser/google_apis/test_util.cc
index 4e7c142..93d592b 100644
--- a/chrome/browser/google_apis/test_util.cc
+++ b/chrome/browser/google_apis/test_util.cc
@@ -10,6 +10,7 @@
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/pending_task.h"
+#include "base/rand_util.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
@@ -90,6 +91,29 @@ void RunAndQuit(const base::Closure& closure) {
   MessageLoop::current()->Quit();
 }
 
+bool WriteStringToFile(const base::FilePath& file_path,
+                       const std::string& content) {
+  int result = file_util::WriteFile(file_path, content.data(), content.size());
+  return content.size() == static_cast<size_t>(result);
+}
+
+bool CreateFileOfSpecifiedSize(const base::FilePath& temp_dir,
+                               size_t size,
+                               base::FilePath* path,
+                               std::string* data) {
+  if (!file_util::CreateTemporaryFileInDir(temp_dir, path))
+    return false;
+
+  if (size == 0) {
+    // Note: RandBytesAsString doesn't support generating an empty string.
+    data->clear();
+    return true;
+  }
+
+  *data = base::RandBytesAsString(size);
+  return WriteStringToFile(*path, *data);
+}
+
 scoped_ptr<base::Value> LoadJSONFile(const std::string& relative_path) {
   base::FilePath path = GetTestFilePath(relative_path);