polardbxengine/unittest/gunit/bounds_checked_array-t.cc

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   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

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   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
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#include <gtest/gtest.h>
#include <algorithm>

#include "sql/sql_array.h"

namespace bounds_check_array_unittest {

typedef Bounds_checked_array<int> Int_array;

class BoundsCheckedArray : public ::testing::Test {
 public:
  BoundsCheckedArray() : some_integer(0) {}

  virtual void SetUp() {
    for (int ix = 0; ix < c_array_size; ++ix) c_array[ix] = ix;
  }

  static const int c_array_size = 5;
  int c_array[c_array_size];

  int some_integer;
  Int_array int_array;
};

}  // namespace bounds_check_array_unittest

/*
  operator<<() is needed by the EXPECT macros.
  It is a template argument, so static rather than in unnamed namespace.
 */
static inline std::ostream &operator<<(
    std::ostream &s, const bounds_check_array_unittest::Int_array &v) {
  return s << "{" << v.array() << ", " << v.size() << "}";
}

namespace bounds_check_array_unittest {

TEST_F(BoundsCheckedArray, Empty) {
  EXPECT_EQ(sizeof(int), int_array.element_size());
  EXPECT_EQ(0U, int_array.size());
  EXPECT_TRUE(int_array.is_null());
  int *pi = NULL;
  EXPECT_EQ(pi, int_array.array());
}

#if !defined(DBUG_OFF)

// Google Test recommends DeathTest suffix for classes used in death tests.
typedef BoundsCheckedArray BoundsCheckedArrayDeathTest;

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckRead) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  EXPECT_DEATH_IF_SUPPORTED(some_integer = int_array[5],
                            ".*Assertion .*n < m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckAssign) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  EXPECT_DEATH_IF_SUPPORTED(int_array[5] = some_integer,
                            ".*Assertion .*n < m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckPopFront) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 1);
  int_array.pop_front();
  EXPECT_DEATH_IF_SUPPORTED(int_array.pop_front(),
                            ".*Assertion .*m_size > 0.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckResize) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 1);
  EXPECT_DEATH_IF_SUPPORTED(int_array.resize(2),
                            ".*Assertion .*new_size <= m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckResizeAssign) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  int_array[1] = some_integer;
  int_array.resize(1);
  EXPECT_DEATH_IF_SUPPORTED(int_array[1] = some_integer,
                            ".*Assertion .*n < m_size.*");
}

#endif  // !defined(DBUG_OFF)

TEST_F(BoundsCheckedArray, Indexing) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(0, int_array[0]);
  int_array[0] = 42;
  EXPECT_EQ(42, int_array[0]);
}

TEST_F(BoundsCheckedArray, Reset) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(c_array, int_array.array());
  EXPECT_FALSE(int_array.is_null());
  int_array.reset();
  int *pi = NULL;
  EXPECT_EQ(pi, int_array.array());
  EXPECT_TRUE(int_array.is_null());
}

TEST_F(BoundsCheckedArray, Resize) {
  int_array = Int_array(c_array, c_array_size);
  int_array.resize(c_array_size - 1);
  EXPECT_EQ(c_array_size - 1, static_cast<int>(int_array.size()));

  int count = 0;
  while (int_array.size() > 0) {
    EXPECT_EQ(count, int_array[0]);
    count++;
    int_array.pop_front();
  }

  EXPECT_EQ(count, c_array_size - 1);
}

TEST_F(BoundsCheckedArray, PopFront) {
  int_array = Int_array(c_array, c_array_size);
  for (int ix = 0; ix < c_array_size; ++ix) {
    EXPECT_EQ(ix, int_array[0]);
    int_array.pop_front();
  }
}

TEST_F(BoundsCheckedArray, Equality) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(int_array, int_array);

  Int_array int_array_copy(int_array);
  EXPECT_EQ(int_array, int_array_copy)
      << " original " << int_array << " copy " << int_array_copy;

  int_array_copy.resize(c_array_size - 1);
  EXPECT_NE(int_array, int_array_copy);

  // We share the underlying array, so these should be equal.
  Int_array int_array_two(c_array, c_array_size);
  EXPECT_EQ(int_array, int_array_two);

  int_array_two.pop_front();
  EXPECT_NE(int_array, int_array_two);
}

TEST_F(BoundsCheckedArray, Sort) {
  int_array = Int_array(c_array, c_array_size);
  std::random_shuffle(int_array.begin(), int_array.end());
  std::sort(int_array.begin(), int_array.end());
  Int_array::const_iterator it;
  int ix;
  for (ix = 0, it = int_array.begin(); it != int_array.end(); ++it, ++ix)
    EXPECT_EQ(ix, *it);
}

}  // namespace bounds_check_array_unittest