/*
   Copyright (c) 2014, 2015, 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 as published by
   the Free Software Foundation; version 2 of the License.

   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 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,
   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

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

#include "fake_key.h"                             // Fake_KEY
#include "key.h"                                  // KEY

namespace recperkey_unittest {

/**
  Test the API for setting and getting records per key values.
*/

TEST(RecPerKeyTest, RecPerKeyAPI)
{
  const uint key_parts= 3;

  Fake_KEY key(key_parts, false);

  /*
    Test that the rec_per_key values are default/unknown.
  */
  for (uint kp=0; kp < key_parts; kp++)
  {
    EXPECT_FALSE(key.has_records_per_key(kp));
    EXPECT_EQ(key.records_per_key(kp), REC_PER_KEY_UNKNOWN);
  }

  /*
    Test setting the values using the API
  */

  // Give one of the key parts a value
  key.set_records_per_key(1, 2.0);

  // Validate that only one of the key parts has gotten a value
  EXPECT_FALSE(key.has_records_per_key(0));
  EXPECT_TRUE(key.has_records_per_key(1));
  EXPECT_FALSE(key.has_records_per_key(2));

  EXPECT_EQ(key.records_per_key(0), REC_PER_KEY_UNKNOWN);
  EXPECT_EQ(key.records_per_key(1), 2.0);
  EXPECT_EQ(key.records_per_key(2), REC_PER_KEY_UNKNOWN);

  // Reset the rec_per_key value to default/unkown
  key.set_records_per_key(1, REC_PER_KEY_UNKNOWN);
  EXPECT_FALSE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), REC_PER_KEY_UNKNOWN);
}


/**
  Test the old integer based rec_per_key implementation used
  together with the records per key API.
*/

TEST(RecPerKeyTest, RecPerKey)
{
  const uint key_parts= 3;

  Fake_KEY key(key_parts, false);

  // Set values directly in the integer based rec_per_key array
  key.rec_per_key[0]= 0;                        // default/unknown value
  key.rec_per_key[1]= 1;
  key.rec_per_key[2]= 2;

  // Validate that this produces correct values using the API functions
  EXPECT_FALSE(key.has_records_per_key(0));
  EXPECT_EQ(key.records_per_key(0), REC_PER_KEY_UNKNOWN);
  EXPECT_TRUE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), 1.0);
  EXPECT_TRUE(key.has_records_per_key(2));
  EXPECT_EQ(key.records_per_key(2), 2.0);

  // Reset the values
  key.rec_per_key[1]= 0;
  key.rec_per_key[2]= 0;
  EXPECT_FALSE(key.has_records_per_key(0));
  EXPECT_EQ(key.records_per_key(0), REC_PER_KEY_UNKNOWN);
  EXPECT_FALSE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), REC_PER_KEY_UNKNOWN);
  EXPECT_FALSE(key.has_records_per_key(2));
  EXPECT_EQ(key.records_per_key(2), REC_PER_KEY_UNKNOWN);
  
  /*
    Test that if both integer and float rec_per_key values are set,
    the float values will be used.
  */

  // Give a value using the integer based rec_per_key
  key.rec_per_key[1]= 1;
  EXPECT_TRUE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), 1.0);

  // Update the value using the API
  key.set_records_per_key(1, 2.0);
  EXPECT_TRUE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), 2.0);
  
  // Set the value back to default/unknown
  key.set_records_per_key(1, REC_PER_KEY_UNKNOWN);

  /*
    This result might not be intuitive but when we set the value using
    the API, only the float value will be updated. When the float value
    is set to default/unknown, the integer value will be used instead.
    In pratice this is not an issue, but can be solved by setting
    the integer value to 0, when setting the float value.
  */
  EXPECT_TRUE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), 1.0);

  /*
    Verify that we get default/unknown when also setting the integer
    value to the default/unknown value.
  */
  key.rec_per_key[1]= 0;    
  EXPECT_FALSE(key.has_records_per_key(1));
  EXPECT_EQ(key.records_per_key(1), REC_PER_KEY_UNKNOWN);
}

}
