Create directory if the given gtest_output path is in an unexisting directory.

chrome/test/test_launcher/test_runner.cc

 // Copyright (c) 2009 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 "chrome/test/test_launcher/test_runner.h"
 
 #include <iostream>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 22 matching lines @@
 // Note: as currently XML is the only supported format by gtest, we don't
 // check output format (e.g. "xml:" prefix) here and output an XML file
 // unconditionally.
 // Note: we don't output per-test-case or total summary info like
 // total failed_test_count, disabled_test_count, elapsed_time and so on.
 // Only each test (testcase element in the XML) will have the correct
 // failed/disabled/elapsed_time information. Each test won't include
 // detailed failure messages either.
 class ResultsPrinter {
  public:
-  ResultsPrinter(const CommandLine& command_line);
+  explicit ResultsPrinter(const CommandLine& command_line);
   ~ResultsPrinter();
   void OnTestCaseStart(const char* name, int test_count) const;
   void OnTestCaseEnd() const;
   void OnTestEnd(const char* name, const char* case_name, bool run,
                  bool failure, double elapsed_time) const;
  private:
   FILE* out_;
 };
 
 ResultsPrinter::ResultsPrinter(const CommandLine& command_line) : out_(NULL) {
@@ skipping 10 matching lines @@
     // Note: This does NOT check that a directory (or file) actually exists
     // (the behavior is same as what gtest does).
     if (file_util::EndsWithSeparator(path)) {
       FilePath executable = command_line.GetProgram().BaseName();
       path = path.Append(executable.ReplaceExtension(
           FilePath::StringType(FILE_PATH_LITERAL("xml"))));
     }
   }
   if (path.value().empty())
     path = FilePath(kDefaultOutputFile);
+  FilePath dir_name = path.DirName();
+  if (!file_util::DirectoryExists(dir_name)) {
+    LOG(WARNING) << "The output directory does not exist. "
+                 << "Creating the directory: " << dir_name.value() << std::endl;
+    // Create the directory if necessary (because the gtest does the same).
+    file_util::CreateDirectory(dir_name);
+  }
   out_ = file_util::OpenFile(path, "w");
   if (!out_) {
     LOG(ERROR) << "Cannot open output file: "
                << path.value() << "." << std::endl;
     return;
   }
   fprintf(out_, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
   fprintf(out_, "<testsuites name=\"AllTests\" tests=\"\" failures=\"\""
           " disabled=\"\" errors=\"\" time=\"\">\n");
 }
@@ skipping 162 matching lines @@
   printf("Failing tests:\n");
   for (std::vector<std::string>::const_iterator iter = failed_tests.begin();
        iter != failed_tests.end(); ++iter) {
     printf("%s\n", iter->c_str());
   }
 
   return false;
 }
 
 }  // namespace