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/* Copyright (c) 2011, 2025, Oracle and/or its affiliates.
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 designed to work 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 either included with
the program or referenced in the documentation.
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 */
#include <gtest/gtest.h>
#include "sql/handler.h"
namespace cost_estimate_unittest {
TEST(CostEstimateTest, Basics) {
Cost_estimate ce1;
EXPECT_EQ(0, ce1.total_cost());
EXPECT_TRUE(ce1.is_zero());
const double initial_io_cost = 4.5;
ce1.add_io(initial_io_cost);
EXPECT_FALSE(ce1.is_zero());
EXPECT_DOUBLE_EQ(initial_io_cost, ce1.total_cost());
const double initial_cpu_cost = 3.3;
ce1.add_cpu(initial_cpu_cost);
EXPECT_DOUBLE_EQ(initial_cpu_cost, ce1.get_cpu_cost());
EXPECT_DOUBLE_EQ(initial_io_cost, ce1.get_io_cost());
EXPECT_DOUBLE_EQ(initial_io_cost + initial_cpu_cost, ce1.total_cost());
EXPECT_EQ(0, ce1.get_mem_cost());
EXPECT_EQ(0, ce1.get_import_cost());
const double initial_mem_cost = 7;
const double initial_import_cost = 11;
ce1.add_mem(initial_mem_cost);
ce1.add_import(initial_import_cost);
const double total_initial_cost =
initial_io_cost + initial_cpu_cost + initial_import_cost;
EXPECT_DOUBLE_EQ(total_initial_cost, ce1.total_cost());
const double added_io_cost = 1.5;
ce1.add_io(added_io_cost);
EXPECT_DOUBLE_EQ(initial_io_cost + added_io_cost, ce1.get_io_cost());
EXPECT_DOUBLE_EQ(total_initial_cost + added_io_cost, ce1.total_cost());
EXPECT_FALSE(ce1.is_zero());
ce1.reset();
EXPECT_TRUE(ce1.is_zero());
}
TEST(CostEstimateTest, Operators) {
Cost_estimate ce_io;
EXPECT_EQ(0, ce_io.total_cost());
EXPECT_TRUE(ce_io.is_zero());
const double initial_io_cost = 4.5;
ce_io.add_io(initial_io_cost);
EXPECT_DOUBLE_EQ(initial_io_cost, ce_io.total_cost());
Cost_estimate ce_cpu;
const double initial_cpu_cost = 3.3;
ce_cpu.add_cpu(initial_cpu_cost);
EXPECT_DOUBLE_EQ(initial_cpu_cost, ce_cpu.total_cost());
EXPECT_EQ(0, ce_cpu.get_io_cost());
// Copy CTOR
Cost_estimate ce_copy(ce_io);
const double added_io_cost = 1.5;
ce_io.add_io(added_io_cost); // should not add to ce_copy
EXPECT_DOUBLE_EQ(initial_io_cost + added_io_cost, ce_io.total_cost());
EXPECT_DOUBLE_EQ(initial_io_cost, ce_copy.total_cost());
// operator+=
ce_copy += ce_cpu;
EXPECT_DOUBLE_EQ(initial_io_cost + initial_cpu_cost, ce_copy.total_cost());
// operator+
Cost_estimate ce_copy2 = ce_io + ce_cpu;
const double copy2_totcost =
initial_io_cost + added_io_cost + initial_cpu_cost;
EXPECT_DOUBLE_EQ(copy2_totcost, ce_copy2.total_cost());
Cost_estimate ce_mem_import1;
const double import1_mem_cost = 3;
const double import1_import_cost = 5;
ce_mem_import1.add_mem(import1_mem_cost);
ce_mem_import1.add_import(import1_import_cost);
Cost_estimate ce_mem_import2;
const double import2_mem_cost = 11;
const double import2_import_cost = 13;
ce_mem_import2.add_mem(import2_mem_cost);
ce_mem_import2.add_import(import2_import_cost);
// operator+
Cost_estimate ce_mi_copy = ce_mem_import1 + ce_mem_import2;
EXPECT_DOUBLE_EQ(import1_import_cost + import2_import_cost,
ce_mi_copy.total_cost());
EXPECT_DOUBLE_EQ(import1_mem_cost + import2_mem_cost,
ce_mi_copy.get_mem_cost());
EXPECT_DOUBLE_EQ(import1_import_cost + import2_import_cost,
ce_mi_copy.get_import_cost());
// operator+=
ce_mi_copy += ce_mem_import1;
EXPECT_DOUBLE_EQ(2 * import1_import_cost + import2_import_cost,
ce_mi_copy.total_cost());
EXPECT_DOUBLE_EQ(2 * import1_mem_cost + import2_mem_cost,
ce_mi_copy.get_mem_cost());
EXPECT_DOUBLE_EQ(2 * import1_import_cost + import2_import_cost,
ce_mi_copy.get_import_cost());
// operator-
ce_mi_copy = ce_mem_import1 - ce_mem_import2;
EXPECT_DOUBLE_EQ(
ce_mi_copy.get_mem_cost(),
ce_mem_import1.get_mem_cost() - ce_mem_import2.get_mem_cost());
EXPECT_DOUBLE_EQ(
ce_mi_copy.get_import_cost(),
ce_mem_import1.get_import_cost() - ce_mem_import2.get_import_cost());
// copy assignment
Cost_estimate ce_copy3;
ce_copy3 = ce_copy2;
EXPECT_DOUBLE_EQ(copy2_totcost, ce_copy3.total_cost());
}
TEST(CostEstimateTest, MaxValue) {
Cost_estimate ce;
Cost_estimate ce2;
EXPECT_FALSE(ce.is_max_cost());
ce.set_max_cost();
EXPECT_TRUE(ce.is_max_cost());
EXPECT_TRUE(ce > ce2);
EXPECT_FALSE(ce < ce2);
EXPECT_FALSE(ce2 > ce);
EXPECT_TRUE(ce2 < ce);
ce2 = ce;
EXPECT_TRUE(ce2.is_max_cost());
EXPECT_FALSE(ce < ce2);
EXPECT_FALSE(ce2 > ce);
}
} // namespace cost_estimate_unittest
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