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https://github.com/RGBCube/serenity
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58d0577a02
There were two issues: 1) the C+=R and C-=R operators expected arithmetic types to have .real() 2) the R+C, R-C, R*C and R/C operators applied the operation in wrong order (did C+R, C-R, C*R and C/R instead). This wouldn't matter for + and * which are commutative, but is incorrect for - and /.
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021, Cesar Torres <shortanemoia@protonmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/Complex.h>
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TEST_CASE(Complex)
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{
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auto a = Complex<float> { 1.f, 1.f };
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auto b = complex_real_unit<double> + Complex<double> { 0, 1 } * 1;
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EXPECT_APPROXIMATE(a.real(), b.real());
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EXPECT_APPROXIMATE(a.imag(), b.imag());
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#ifdef AKCOMPLEX_CAN_USE_MATH_H
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EXPECT_APPROXIMATE((complex_imag_unit<float> - complex_imag_unit<float>).magnitude(), 0);
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EXPECT_APPROXIMATE((complex_imag_unit<float> + complex_real_unit<float>).magnitude(), sqrt(2));
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auto c = Complex<double> { 0., 1. };
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auto d = Complex<double>::from_polar(1., M_PI / 2.);
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EXPECT_APPROXIMATE(c.real(), d.real());
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EXPECT_APPROXIMATE(c.imag(), d.imag());
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c = Complex<double> { -1., 1. };
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d = Complex<double>::from_polar(sqrt(2.), 3. * M_PI / 4.);
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EXPECT_APPROXIMATE(c.real(), d.real());
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EXPECT_APPROXIMATE(c.imag(), d.imag());
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EXPECT_APPROXIMATE(d.phase(), 3. * M_PI / 4.);
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EXPECT_APPROXIMATE(c.magnitude(), d.magnitude());
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EXPECT_APPROXIMATE(c.magnitude(), sqrt(2.));
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#endif
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EXPECT_EQ((complex_imag_unit<double> * complex_imag_unit<double>).real(), -1.);
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EXPECT_EQ((complex_imag_unit<double> / complex_imag_unit<double>).real(), 1.);
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EXPECT_EQ(Complex(1., 10.) == (Complex<double>(1., 0.) + Complex(0., 10.)), true);
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EXPECT_EQ(Complex(1., 10.) != (Complex<double>(1., 1.) + Complex(0., 10.)), true);
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#ifdef AKCOMPLEX_CAN_USE_MATH_H
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EXPECT_EQ(approx_eq(Complex<int>(1), Complex<float>(1.0000004f)), true);
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EXPECT_APPROXIMATE(cexp(Complex<double>(0., 1.) * M_PI).real(), -1.);
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#endif
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}
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TEST_CASE(real_operators_regression)
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{
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{
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auto c = Complex(0., 0.);
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c += 1;
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EXPECT_EQ(c.real(), 1);
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}
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{
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auto c = Complex(0., 0.);
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c -= 1;
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EXPECT_EQ(c.real(), -1);
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}
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{
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auto c1 = Complex(1., 1.);
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auto c2 = 1 - c1;
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EXPECT_EQ(c2.real(), 0);
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EXPECT_EQ(c2.imag(), -1);
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}
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{
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auto c1 = Complex(1., 1.);
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auto c2 = 1 / c1;
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EXPECT_EQ(c2.real(), 0.5);
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EXPECT_EQ(c2.imag(), -0.5);
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}
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}
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