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143 lines
3.3 KiB
C++
143 lines
3.3 KiB
C++
/*
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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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"Some simple comparisons between doubles",
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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( 1.23 ) );
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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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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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"Approximate comparisons 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( 1.231 ) );
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REQUIRE( d == Approx( 1.231 ).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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"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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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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"Approximate comparisons with floats",
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"[Approx]"
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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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"Approximate comparisons with ints",
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"[Approx]"
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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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"Approximate comparisons with mixed numeric types",
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"[Approx]"
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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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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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}
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///////////////////////////////////////////////////////////////////////////////
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TEST_CASE
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(
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"Use a custom approx",
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"[Approx][custom]"
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)
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{
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double d = 1.23;
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Approx approx = Approx::custom().epsilon( 0.005 );
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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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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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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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