/* Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

// First include (the generated) my_config.h, to get correct platform defines.
#include "my_config.h"

#include <gtest/gtest.h>

#include "my_dbug.h"
#include "unittest/gunit/thread_utils.h"

using thread::Notification;
using thread::Thread;

namespace dbug_unittest {

#if defined(DBUG_OFF)
TEST(DebugTest, NoSuicide) { DBUG_SUICIDE(); }
#else
TEST(DebugDeathTest, Suicide) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  EXPECT_DEATH_IF_SUPPORTED(DBUG_SUICIDE(), "");
}
#endif

#if !defined(DBUG_OFF) && !defined(_WIN32)
class DbugGcovThread : public Thread {
 public:
  DbugGcovThread(Notification *start_notification)
      : m_start_notification(start_notification) {}

  virtual void run() {
    m_start_notification->notify();
    _db_flush_gcov_();
  }

 private:
  Notification *m_start_notification;
};

TEST(DebugFlushGcov, FlushGcovParallel) {
  Notification start_notification;
  DbugGcovThread debug_thread(&start_notification);
  debug_thread.start();

  // Wait for the other thread to start, then flush in parallel.
  start_notification.wait_for_notification();
  _db_flush_gcov_();
  debug_thread.join();
}
#endif

#if !defined(DBUG_OFF)
TEST(DebugPrintTest, PrintEval) {
  int y = 0;

  // This DBUG_PRINT args should never be evaluated.
  DBUG_PRINT("never", ("%d", y += 1));
  EXPECT_EQ(y, 0) << "DBUG_PRINT arg is evaluated.";
}

TEST(DebugPrintEvalTest, PrintEval) {
  int y = 0;

  DBUG_SET("+d,never");
  DBUG_PRINT("never", ("%d", y += 1));
  DBUG_SET("");
  EXPECT_GE(y, 1) << "DBUG_PRINT arg is not evaluated.";
}

TEST(DebugSetTest, DebugKeywordsTest) {
  char buf[1024];

  /*
    Enable d flag, then enable debug on a keyword. The debug should
    remain set to d and empty list of keywords indicating debug is
    enabled for all.
  */
  DBUG_SET("d");
  DBUG_SET("+d,keyword");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d", buf);
  DBUG_SET("");

  /*
    Set debug on a specific keyword. Debug should be enabled
    for the keyword.
  */
  DBUG_SET("+d,keyword");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,keyword", buf);

  /*
    Remove the keyword from debug list. Debug should be
    disabled.
  */
  DBUG_SET("-d,keyword");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("", buf);
  DBUG_SET("");

  /*
    Enable debug for a keyword. Then enable debug for all
    keywords. Debug should now be enabled for all keywords.
  */
  DBUG_SET("+d,keyword");
  DBUG_SET("+d");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d", buf);
  DBUG_SET("");

  // Add multiple debug keywords.
  DBUG_SET("+d,keyword1");
  DBUG_SET("+d,keyword2");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,keyword1,keyword2", buf);
  DBUG_SET("-d,keyword1");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,keyword2", buf);
  DBUG_SET("-d,keyword2");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("", buf);
  DBUG_SET("");

  // Add two keywords, the second keyword being a prefix of the first keyword.
  DBUG_SET("+d,simulate_file_error_once,simulate_file_error");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,simulate_file_error_once,simulate_file_error", buf);
  DBUG_SET("");

  // Add same keyword thrice, keyword should show up once in debug list.
  DBUG_SET("+d,keyword,keyword,keyword");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,keyword", buf);
  DBUG_SET("");

  // Add some combination of keywords with whitespace and duplicates.
  DBUG_SET("+d, keyword1,  keyword2,   keyword1,keyword3   ");
  DBUG_EXPLAIN(buf, sizeof(buf));
  EXPECT_STREQ("d,keyword1,keyword2,keyword3", buf);
  DBUG_SET("");
}
#endif /* DBUG_OFF */
}  // namespace dbug_unittest