2011-04-28 09:28:03 +02:00
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/*
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* Created by Phil on 28/04/2011.
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* Copyright 2011 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include "catch.hpp"
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Some simple comparisons between doubles",
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"[Approx]"
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2011-05-24 09:23:02 +02:00
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)
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2011-04-28 09:28:03 +02:00
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{
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double d = 1.23;
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2015-11-04 19:01:28 +01:00
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2011-04-28 09:28:03 +02:00
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REQUIRE( d == Approx( 1.23 ) );
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REQUIRE( d != Approx( 1.22 ) );
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REQUIRE( d != Approx( 1.24 ) );
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REQUIRE( Approx( d ) == 1.23 );
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REQUIRE( Approx( d ) != 1.22 );
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REQUIRE( Approx( d ) != 1.24 );
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}
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2011-05-24 09:23:02 +02:00
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Approximate comparisons with different epsilons",
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"[Approx]"
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2011-05-24 09:23:02 +02:00
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)
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{
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double d = 1.23;
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2015-11-04 19:01:28 +01:00
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2011-05-24 09:23:02 +02:00
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REQUIRE( d != Approx( 1.231 ) );
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REQUIRE( d == Approx( 1.231 ).epsilon( 0.1 ) );
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2011-06-03 19:56:47 +02:00
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}
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2016-09-24 18:59:23 +02:00
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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"Less-than inequalities with different epsilons",
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"[Approx]"
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)
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{
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double d = 1.23;
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REQUIRE( d <= Approx( 1.24 ) );
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REQUIRE( d <= Approx( 1.23 ) );
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REQUIRE_FALSE( d <= Approx( 1.22 ) );
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REQUIRE( d <= Approx( 1.22 ).epsilon(0.1) );
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}
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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"Greater-than inequalities with different epsilons",
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"[Approx]"
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)
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{
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double d = 1.23;
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REQUIRE( d >= Approx( 1.22 ) );
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REQUIRE( d >= Approx( 1.23 ) );
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REQUIRE_FALSE( d >= Approx( 1.24 ) );
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REQUIRE( d >= Approx( 1.24 ).epsilon(0.1) );
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}
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2011-06-03 19:56:47 +02:00
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Approximate comparisons with floats",
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"[Approx]"
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2011-06-03 19:56:47 +02:00
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)
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{
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REQUIRE( 1.23f == Approx( 1.23f ) );
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REQUIRE( 0.0f == Approx( 0.0f ) );
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}
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Approximate comparisons with ints",
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"[Approx]"
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2011-06-03 19:56:47 +02:00
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)
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{
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REQUIRE( 1 == Approx( 1 ) );
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REQUIRE( 0 == Approx( 0 ) );
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}
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Approximate comparisons with mixed numeric types",
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"[Approx]"
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2011-06-03 19:56:47 +02:00
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)
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{
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const double dZero = 0;
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const double dSmall = 0.00001;
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const double dMedium = 1.234;
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2015-11-04 19:01:28 +01:00
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2011-06-03 19:56:47 +02:00
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REQUIRE( 1.0f == Approx( 1 ) );
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REQUIRE( 0 == Approx( dZero) );
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REQUIRE( 0 == Approx( dSmall ).epsilon( 0.001 ) );
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REQUIRE( 1.234f == Approx( dMedium ) );
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REQUIRE( dMedium == Approx( 1.234f ) );
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2011-05-24 09:23:02 +02:00
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}
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2011-06-06 09:21:21 +02:00
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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2013-11-19 08:21:03 +01:00
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"Use a custom approx",
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"[Approx][custom]"
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2011-06-06 09:21:21 +02:00
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)
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{
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double d = 1.23;
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2015-11-04 19:01:28 +01:00
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2011-06-06 09:21:21 +02:00
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Approx approx = Approx::custom().epsilon( 0.005 );
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2015-11-04 19:01:28 +01:00
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2011-06-06 09:21:21 +02:00
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REQUIRE( d == approx( 1.23 ) );
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REQUIRE( d == approx( 1.22 ) );
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REQUIRE( d == approx( 1.24 ) );
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REQUIRE( d != approx( 1.25 ) );
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2015-11-04 19:01:28 +01:00
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2011-06-06 09:21:21 +02:00
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REQUIRE( approx( d ) == 1.23 );
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REQUIRE( approx( d ) == 1.22 );
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REQUIRE( approx( d ) == 1.24 );
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REQUIRE( approx( d ) != 1.25 );
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}
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2013-03-04 12:19:15 +01:00
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inline double divide( double a, double b ) {
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return a/b;
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}
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TEST_CASE( "Approximate PI", "[Approx][PI]" )
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{
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REQUIRE( divide( 22, 7 ) == Approx( 3.141 ).epsilon( 0.001 ) );
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REQUIRE( divide( 22, 7 ) != Approx( 3.141 ).epsilon( 0.0001 ) );
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}
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2016-05-12 20:18:44 +02:00
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////////////////////////////////////////////////////////////////////////////////
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2017-01-26 18:47:29 +01:00
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#if defined(CATCH_CONFIG_CPP11_TYPE_TRAITS)
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2016-05-12 20:18:44 +02:00
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class StrongDoubleTypedef
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{
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double d_ = 0.0;
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public:
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explicit StrongDoubleTypedef(double d) : d_(d) {}
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explicit operator double() const { return d_; }
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};
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2017-01-26 18:47:29 +01:00
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inline std::ostream& operator<<( std::ostream& os, StrongDoubleTypedef td ) {
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return os << "StrongDoubleTypedef(" << static_cast<double>(td) << ")";
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}
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2016-05-12 20:18:44 +02:00
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TEST_CASE
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(
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"Comparison with explicitly convertible types",
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"[Approx]"
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)
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{
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StrongDoubleTypedef td(10.0);
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REQUIRE(td == Approx(10.0));
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REQUIRE(Approx(10.0) == td);
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REQUIRE(td != Approx(11.0));
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REQUIRE(Approx(11.0) != td);
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REQUIRE(td <= Approx(10.0));
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REQUIRE(td <= Approx(11.0));
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REQUIRE(Approx(10.0) <= td);
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REQUIRE(Approx(9.0) <= td);
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REQUIRE(td >= Approx(9.0));
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REQUIRE(td >= Approx(10.0));
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REQUIRE(Approx(10.0) >= td);
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REQUIRE(Approx(11.0) >= td);
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}
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#endif
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////////////////////////////////////////////////////////////////////////////////
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