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https://github.com/RGBCube/serenity
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114 lines
4 KiB
C++
114 lines
4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/TestSuite.h>
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#include <math.h>
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#define EXPECT_CLOSE(a, b) \
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{ \
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EXPECT(fabs(a - b) < 0.000001); \
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}
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TEST_CASE(trig)
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{
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EXPECT_CLOSE(sin(1234), 0.653316);
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EXPECT_CLOSE(cos(1234), -0.830914);
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EXPECT_CLOSE(tan(1234), -0.786262);
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EXPECT_CLOSE(sqrt(1234), 35.128336)
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EXPECT_CLOSE(sin(-1), -0.867955);
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EXPECT_CLOSE(cos(-1), 0.594715);
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EXPECT_CLOSE(tan(-1), -1.459446);
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EXPECT(isnan(sqrt(-1)));
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EXPECT(isnan(asin(1.1)));
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EXPECT(isnan(asin(-1.1)));
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EXPECT_CLOSE(asin(0), 0.0);
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EXPECT_CLOSE(asin(0.01), 0.01);
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EXPECT_CLOSE(asin(0.1), 0.100167);
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EXPECT_CLOSE(asin(0.3), 0.304693);
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EXPECT_CLOSE(asin(0.499), 0.522444);
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EXPECT_CLOSE(asin(0.5), 0.523599);
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EXPECT_CLOSE(asin(0.501), 0.524754);
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EXPECT_CLOSE(asin(0.9), 1.119770);
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EXPECT_CLOSE(asin(0.99), 1.429246);
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EXPECT_CLOSE(asin(1.0), 1.570750);
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EXPECT_CLOSE(atan(0), 0.0)
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EXPECT_CLOSE(atan(0.5), 0.463648)
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EXPECT_CLOSE(atan(-0.5), -0.463648)
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EXPECT_CLOSE(atan(5.5), 1.390943)
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EXPECT_CLOSE(atan(-5.5), -1.390943)
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EXPECT_CLOSE(atan(555.5), 1.568996)
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}
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TEST_CASE(other)
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{
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EXPECT_EQ(trunc(9999999999999.5), 9999999999999.0);
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EXPECT_EQ(trunc(-9999999999999.5), -9999999999999.0);
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}
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TEST_CASE(exponents)
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{
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struct values {
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double x;
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double exp;
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double sinh;
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double cosh;
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double tanh;
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};
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values values[8] {
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{ 1.500000, 4.481626, 2.129246, 2.352379, 0.905148 },
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{ 20.990000, 1304956710.432035, 652478355.216017, 652478355.216017, 1.000000 },
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{ 20.010000, 490041186.687082, 245020593.343541, 245020593.343541, 1.000000 },
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{ 0.000000, 1.000000, 0.000000, 1.000000, 0.000000 },
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{ 0.010000, 1.010050, 0.010000, 1.000050, 0.010000 },
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{ -0.010000, 0.990050, -0.010000, 1.000050, -0.010000 },
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{ -1.000000, 0.367879, -1.175201, 1.543081, -0.761594 },
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{ -17.000000, 0.000000, -12077476.376788, 12077476.376788, -1.000000 },
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};
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for (auto& v : values) {
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EXPECT_CLOSE(exp(v.x), v.exp);
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EXPECT_CLOSE(sinh(v.x), v.sinh);
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EXPECT_CLOSE(cosh(v.x), v.cosh);
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EXPECT_CLOSE(tanh(v.x), v.tanh);
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}
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EXPECT_EQ(exp(1000), std::numeric_limits<double>::infinity());
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}
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TEST_CASE(logarithms)
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{
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EXPECT(isnan(log(-1)));
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EXPECT(log(0) < -1000000);
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EXPECT_CLOSE(log(0.5), -0.693233)
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EXPECT_CLOSE(log(1.1), 0.095310)
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EXPECT_CLOSE(log(5), 1.609480)
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EXPECT_CLOSE(log(5.5), 1.704842)
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EXPECT_CLOSE(log(500), 6.214104)
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EXPECT_CLOSE(log2(5), 2.321989)
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EXPECT_CLOSE(log10(5), 0.698988)
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}
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TEST_MAIN(Math)
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