test-example-projects/c++_projects/280w-mysql-8.0.18/unittest/gunit/get_diagnostics-t.cc

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#include <gtest/gtest.h>
#include <stddef.h>
#include <sys/types.h>

#include "lex_string.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "sql/item.h"
#include "sql/item_func.h"
#include "sql/sql_class.h"
#include "sql/sql_get_diagnostics.h"
#include "unittest/gunit/test_utils.h"

namespace get_diagnostics_unittest {

using my_testing::Mock_error_handler;
using my_testing::Server_initializer;

class GetDiagnosticsTest : public ::testing::Test {
 protected:
  virtual void SetUp() { initializer.SetUp(); }
  virtual void TearDown() { initializer.TearDown(); }

  THD *thd() { return initializer.thd(); }

  Server_initializer initializer;
};

class FailHelper {
 public:
  void fail(const char *message) { FAIL() << message; }
};

LEX_CSTRING var_name1 = {STRING_WITH_LEN("var1")};
LEX_CSTRING var_name2 = {STRING_WITH_LEN("var2")};

class MockDiagInfoItem : public Diagnostics_information_item {
 public:
  MockDiagInfoItem(Item *target, int value)
      : Diagnostics_information_item(target), m_value(value) {}

  Item *get_value(THD *thd, const Diagnostics_area *) {
    return new (thd->mem_root) Item_int(m_value);
  }

 private:
  int m_value;
};

class MockDiagInfo : public Diagnostics_information, private FailHelper {
 public:
  MockDiagInfo(List<MockDiagInfoItem> *items) : m_items(items) {}

 protected:
  bool aggregate(THD *thd, const Diagnostics_area *da) {
    bool rv = false;
    MockDiagInfoItem *diag_info_item;
    List_iterator<MockDiagInfoItem> it(*m_items);

    while ((diag_info_item = it++)) {
      if ((rv = evaluate(thd, diag_info_item, da))) break;
    }

    return rv;
  }

  ~MockDiagInfo() { fail("MockDiagInfo destructor invoked."); }

 private:
  List<MockDiagInfoItem> *m_items;
};

// GET [CURRENT] DIAGNOSTICS @var1 = 1, @var2 = 2;
TEST_F(GetDiagnosticsTest, Cmd) {
  Item *var;
  Sql_cmd *cmd;
  MockDiagInfo *info;
  MockDiagInfoItem *diag_info_item;
  List<MockDiagInfoItem> items;
  MEM_ROOT *mem_root = thd()->mem_root;

  // set var1 item
  var = new (mem_root) Item_func_get_user_var(var_name1);
  diag_info_item = new (mem_root) MockDiagInfoItem(var, 1);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // set var2 item
  var = new (mem_root) Item_func_get_user_var(var_name2);
  diag_info_item = new (mem_root) MockDiagInfoItem(var, 2);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // Information list and command
  info = new (mem_root) MockDiagInfo(&items);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  EXPECT_FALSE(cmd->execute(thd()));
  EXPECT_TRUE(thd()->get_stmt_da()->is_ok());

  // check var1 value
  var = new (mem_root) Item_func_get_user_var(var_name1);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(1, var->val_int());

  // check var2 value
  var = new (mem_root) Item_func_get_user_var(var_name2);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(2, var->val_int());
}

// Verifies death with a DBUG_ASSERT if target item is not settable.
// Google Test recommends DeathTest suffix for classes used in death tests.
typedef GetDiagnosticsTest GetDiagnosticsTestDeathTest;

#if GTEST_HAS_DEATH_TEST && !defined(DBUG_OFF)
TEST_F(GetDiagnosticsTestDeathTest, DieWhenUnsettableItem) {
  Item *var;
  Sql_cmd *cmd;
  MockDiagInfo *info;
  MockDiagInfoItem *diag_info_item;
  List<MockDiagInfoItem> items;
  MEM_ROOT *mem_root = thd()->mem_root;

  ::testing::FLAGS_gtest_death_test_style = "threadsafe";

  // Unsettable item
  var = new (mem_root) Item_int(1);
  diag_info_item = new (mem_root) MockDiagInfoItem(var, 1);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // Information list and command
  info = new (mem_root) MockDiagInfo(&items);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  EXPECT_DEATH(cmd->execute(thd()), ".*Assertion.*srp.*");
}
#endif  // GTEST_HAS_DEATH_TEST && !defined(DBUG_OFF)

class MockDiagInfoError : public Diagnostics_information {
 public:
  MockDiagInfoError(bool fatal_error) : m_fatal_error(fatal_error) {}

 protected:
  bool aggregate(THD *thd, const Diagnostics_area *) {
    myf flag = m_fatal_error ? MYF(ME_FATALERROR) : MYF(0);
    my_message_sql(ER_UNKNOWN_ERROR, "Unknown error", flag);
    return thd->is_error();
  }

 private:
  bool m_fatal_error;
};

// GET DIAGNOSTICS itself causes an error.
TEST_F(GetDiagnosticsTest, Error) {
  Sql_cmd *cmd;
  MockDiagInfoError *info;
  MEM_ROOT *mem_root = thd()->mem_root;

  // Pre-existing warning
  push_warning_printf(thd(), Sql_condition::SL_WARNING, WARN_DATA_TRUNCATED,
                      "Data truncated");

  // Simulate GET DIAGNOSTICS as a new command separated
  // from the one that generated the warning
  thd()->reset_for_next_command();

  // Error bound "information" and command
  info = new (mem_root) MockDiagInfoError(false);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  initializer.set_expected_error(ER_UNKNOWN_ERROR);

  // Should succeed, not a fatal error
  EXPECT_FALSE(cmd->execute(thd()));
  EXPECT_TRUE(thd()->get_stmt_da()->is_ok());

  // New condition for the error
  EXPECT_EQ(1U, thd()->get_stmt_da()->last_statement_cond_count());

  // Counted as a error
  EXPECT_EQ(1U, thd()->get_stmt_da()->error_count(thd()));

  // Error is appended
  EXPECT_EQ(2U, thd()->get_stmt_da()->warn_count(thd()));
}

// GET DIAGNOSTICS itself causes a fatal error.
TEST_F(GetDiagnosticsTest, FatalError) {
  Sql_cmd *cmd;
  MockDiagInfoError *info;
  MEM_ROOT *mem_root = thd()->mem_root;

  // Pre-existing warning
  push_warning_printf(thd(), Sql_condition::SL_WARNING, WARN_DATA_TRUNCATED,
                      "Data truncated");

  // Simulate GET DIAGNOSTICS as a new command separated
  // from the one that generated the warning
  thd()->reset_for_next_command();

  // Error bound "information" and command
  info = new (mem_root) MockDiagInfoError(true);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  initializer.set_expected_error(ER_UNKNOWN_ERROR);

  // Should not succeed due to a fatal error
  EXPECT_TRUE(cmd->execute(thd()));
  EXPECT_TRUE(thd()->get_stmt_da()->is_error());

  // No new condition for the error
  EXPECT_EQ(0U, thd()->get_stmt_da()->error_count(thd()));

  // Fatal error is set, not appended
  EXPECT_EQ(1U, thd()->get_stmt_da()->warn_count(thd()));
}

// GET [CURRENT] DIAGNOSTICS @var1 = NUMBER, @var2 = ROW_COUNT;
TEST_F(GetDiagnosticsTest, StatementInformation) {
  Item *var;
  Sql_cmd *cmd;
  Statement_information *info;
  Statement_information_item *diag_info_item;
  List<Statement_information_item> items;
  MEM_ROOT *mem_root = thd()->mem_root;

  // NUMBER = 1 warning
  thd()->raise_warning(ER_UNKNOWN_ERROR);
  // ROW_COUNT = 5
  thd()->set_row_count_func(5U);

  // var1 will receive the value of NUMBER
  var = new (mem_root) Item_func_get_user_var(var_name1);
  diag_info_item = new (mem_root)
      Statement_information_item(Statement_information_item::NUMBER, var);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // var2 will receive the value of ROW_COUNT
  var = new (mem_root) Item_func_get_user_var(var_name2);
  diag_info_item = new (mem_root)
      Statement_information_item(Statement_information_item::ROW_COUNT, var);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // Information list and command
  info = new (mem_root) Statement_information(&items);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  EXPECT_FALSE(cmd->execute(thd()));
  EXPECT_TRUE(thd()->get_stmt_da()->is_ok());

  // check var1 value
  var = new (mem_root) Item_func_get_user_var(var_name1);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(1U, var->val_uint());

  // check var2 value
  var = new (mem_root) Item_func_get_user_var(var_name2);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(5U, var->val_int());
}

// GET DIAGNOSTICS CONDITION 1 @var1 = MYSQL_ERRNO, @var2 = MESSAGE_TEXT;
TEST_F(GetDiagnosticsTest, ConditionInformation) {
  Item *var;
  String str;
  Sql_cmd *cmd;
  Condition_information *info;
  Condition_information_item *diag_info_item;
  List<Condition_information_item> items;
  MEM_ROOT *mem_root = thd()->mem_root;

  // Pre-existing error
  my_message_sql(ER_UNKNOWN_ERROR, "Unknown error", MYF(0));

  // Simulate GET DIAGNOSTICS as a new command separated
  // from the one that generated the error
  thd()->reset_for_next_command();

  // var1 will receive the value of MYSQL_ERRNO
  var = new (mem_root) Item_func_get_user_var(var_name1);
  diag_info_item = new (mem_root)
      Condition_information_item(Condition_information_item::MYSQL_ERRNO, var);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // var2 will receive the value of MESSAGE_TEXT
  var = new (mem_root) Item_func_get_user_var(var_name2);
  diag_info_item = new (mem_root)
      Condition_information_item(Condition_information_item::MESSAGE_TEXT, var);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // condition number (1)
  var = new (mem_root) Item_uint(1);

  // Information list and command
  info = new (mem_root) Condition_information(var, &items);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  EXPECT_FALSE(cmd->execute(thd()));
  EXPECT_TRUE(thd()->get_stmt_da()->is_ok());

  // check var1 value
  var = new (mem_root) Item_func_get_user_var(var_name1);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(ulonglong(ER_UNKNOWN_ERROR), var->val_uint());

  // check var2 value
  var = new (mem_root) Item_func_get_user_var(var_name2);
  EXPECT_FALSE(var->fix_fields(thd(), &var));
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("Unknown error", str.c_ptr_safe());
}

static Item *get_cond_info_item(THD *thd, uint number,
                                Condition_information_item::Name name) {
  Item *var;
  Sql_cmd *cmd;
  Condition_information *info;
  Condition_information_item *diag_info_item;
  List<Condition_information_item> items;
  MEM_ROOT *mem_root = thd->mem_root;
  LEX_CSTRING var_name = {STRING_WITH_LEN("get_cond_info_item")};

  // Simulate GET DIAGNOSTICS as a new command
  thd->reset_for_next_command();

  // var1 will receive the value of MYSQL_ERRNO
  var = new (mem_root) Item_func_get_user_var(var_name);
  diag_info_item = new (mem_root) Condition_information_item(name, var);
  EXPECT_FALSE(items.push_back(diag_info_item));

  // condition number
  var = new (mem_root) Item_uint(number);

  // Information list and command
  info = new (mem_root) Condition_information(var, &items);
  info->set_which_da(Diagnostics_information::CURRENT_AREA);
  cmd = new (mem_root) Sql_cmd_get_diagnostics(info);

  EXPECT_FALSE(cmd->execute(thd));
  EXPECT_TRUE(thd->get_stmt_da()->is_ok());

  // make a user var item
  var = new (mem_root) Item_func_get_user_var(var_name);
  EXPECT_FALSE(var->fix_fields(thd, &var));

  return var;
}

// GET DIAGNOSTICS CONDITION 1 @var = CLASS_ORIGIN;
// GET DIAGNOSTICS CONDITION 1 @var = SUBCLASS_ORIGIN;
TEST_F(GetDiagnosticsTest, ConditionInformationClassOrigin) {
  Item *var;
  String str;

  // "MySQL" origin
  push_warning_printf(thd(), Sql_condition::SL_WARNING, ER_XAER_NOTA,
                      "Unknown XID");

  // "ISO 9075" origin
  push_warning_printf(thd(), Sql_condition::SL_WARNING, ER_UNKNOWN_ERROR,
                      "Unknown error");

  // Condition 1 CLASS_ORIGIN
  var = get_cond_info_item(thd(), 1, Condition_information_item::CLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("MySQL", str.c_ptr_safe());

  // Condition 1 SUBCLASS_ORIGIN
  var =
      get_cond_info_item(thd(), 1, Condition_information_item::SUBCLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("MySQL", str.c_ptr_safe());

  // Condition 2 CLASS_ORIGIN
  var = get_cond_info_item(thd(), 2, Condition_information_item::CLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("ISO 9075", str.c_ptr_safe());

  // Condition 2 CLASS_ORIGIN
  var =
      get_cond_info_item(thd(), 2, Condition_information_item::SUBCLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("ISO 9075", str.c_ptr_safe());
}

// Push + pop diagnostics area
TEST_F(GetDiagnosticsTest, PushPopDiagnosticsArea) {
  Diagnostics_area da1(false);
  Diagnostics_area da2(false);
  Diagnostics_area *org_da = thd()->get_stmt_da();

  thd()->push_diagnostics_area(&da1);
  EXPECT_EQ(&da1, thd()->get_stmt_da());
  EXPECT_EQ(org_da, thd()->get_stacked_da());

  thd()->push_diagnostics_area(&da2);
  EXPECT_EQ(&da2, thd()->get_stmt_da());
  EXPECT_EQ(&da1, thd()->get_stacked_da());

  thd()->pop_diagnostics_area();
  EXPECT_EQ(&da1, thd()->get_stmt_da());
  EXPECT_EQ(org_da, thd()->get_stacked_da());

  thd()->pop_diagnostics_area();
  EXPECT_EQ(org_da, thd()->get_stmt_da());
  EXPECT_TRUE(thd()->get_stacked_da() == NULL);
}

// Pop when there is just one diagnostics area = assert
#if GTEST_HAS_DEATH_TEST && !defined(DBUG_OFF)
TEST_F(GetDiagnosticsTestDeathTest, DiePopDiagnosticsArea) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";

  EXPECT_DEATH(thd()->pop_diagnostics_area(), ".*Assertion.*m_stacked_da*");
}
#endif  // GTEST_HAS_DEATH_TEST && !defined(DBUG_OFF)

// Pushed diagnostics area should initially contain copy of conditions
TEST_F(GetDiagnosticsTest, PushDiagnosticsArea) {
  Diagnostics_area da(false);
  Diagnostics_area *org_da = thd()->get_stmt_da();

  Item *var;
  String str;

  // "MySQL" origin
  push_warning_printf(thd(), Sql_condition::SL_WARNING, ER_XAER_NOTA,
                      "Unknown XID");

  // "ISO 9075" origin
  push_warning_printf(thd(), Sql_condition::SL_WARNING, ER_UNKNOWN_ERROR,
                      "Unknown error");

  // Push new diagnostics area, clear old
  thd()->push_diagnostics_area(&da);
  org_da->reset_condition_info(thd());
  EXPECT_TRUE(org_da->cond_count() == 0);
  EXPECT_FALSE(da.cond_count() == 0);
  EXPECT_FALSE(thd()->get_stmt_da()->cond_count() == 0);

  // Condition 1 CLASS_ORIGIN
  var = get_cond_info_item(thd(), 1, Condition_information_item::CLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("MySQL", str.c_ptr_safe());

  // Condition 1 SUBCLASS_ORIGIN
  var =
      get_cond_info_item(thd(), 1, Condition_information_item::SUBCLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("MySQL", str.c_ptr_safe());

  // Condition 2 CLASS_ORIGIN
  var = get_cond_info_item(thd(), 2, Condition_information_item::CLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("ISO 9075", str.c_ptr_safe());

  // Condition 2 CLASS_ORIGIN
  var =
      get_cond_info_item(thd(), 2, Condition_information_item::SUBCLASS_ORIGIN);
  EXPECT_EQ(&str, var->val_str(&str));
  EXPECT_STREQ("ISO 9075", str.c_ptr_safe());

  thd()->pop_diagnostics_area();
  EXPECT_TRUE(thd()->get_stacked_da() == NULL);
  EXPECT_TRUE(thd()->get_stmt_da()->cond_count() == 0);
}

}  // namespace get_diagnostics_unittest