155 lines
5.2 KiB
C++
155 lines
5.2 KiB
C++
/* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "my_config.h"
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#include <gtest/gtest.h>
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#include <climits>
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#include "sql/float_compare.h"
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namespace float_compare_unittest {
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TEST(FloatCompare, AlmostEqualDouble) {
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double val1 = 0.0;
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double val2 = 1.0;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = -0.0;
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val2 = 0.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 0.0;
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val2 = 0.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<double>::max();
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val2 = std::numeric_limits<double>::infinity();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = 1.0;
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val2 = 1.0 + std::numeric_limits<double>::epsilon();
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 99999999.0000001;
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val2 = 99999999.00000013;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<double>::infinity();
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val2 = -std::numeric_limits<double>::infinity();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<double>::infinity();
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val2 = std::numeric_limits<double>::infinity();
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 0.0 - std::numeric_limits<double>::epsilon();
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val2 = 0.0 + std::numeric_limits<double>::epsilon();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<double>::quiet_NaN();
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val2 = std::numeric_limits<double>::quiet_NaN();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<double>::quiet_NaN();
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val2 = 0.0;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = 1.0e+18;
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val2 = val1 + 100.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2, 4));
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2, 0));
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val1 = 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1;
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val2 = 1.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 99999999.0000001;
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val2 = 99999999.00000016;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2, 4));
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2, 6));
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}
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TEST(FloatCompare, AlmostEqualFloat) {
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float val1 = 0.0;
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float val2 = 1.0;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = -0.0;
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val2 = 0.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 0.0;
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val2 = 0.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<float>::max();
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val2 = std::numeric_limits<float>::infinity();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = 1.0;
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val2 = 1.0 + std::numeric_limits<float>::epsilon();
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 99999999.0000001;
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val2 = 99999999.00000013;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<float>::infinity();
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val2 = -std::numeric_limits<float>::infinity();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<float>::infinity();
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val2 = std::numeric_limits<float>::infinity();
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 0.0 - std::numeric_limits<float>::epsilon();
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val2 = 0.0 + std::numeric_limits<float>::epsilon();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<float>::quiet_NaN();
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val2 = std::numeric_limits<float>::quiet_NaN();
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = std::numeric_limits<float>::quiet_NaN();
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val2 = 0.0;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2));
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val1 = 1.0e+18;
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val2 = val1 + 100.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2, 4));
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2, 0));
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val1 = 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1;
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val2 = 1.0;
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2));
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val1 = 99999970.0;
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val2 = 100000000.0;
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EXPECT_FALSE(Float_compare::almost_equal(val1, val2, 4));
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EXPECT_TRUE(Float_compare::almost_equal(val1, val2, 6));
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}
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} // namespace float_compare_unittest
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