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318 lines
8.4 KiB
C++
318 lines
8.4 KiB
C++
/*
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* Created by Phil on 08/11/2010.
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* Copyright 2010 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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#ifdef __clang__
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# pragma clang diagnostic ignored "-Wpadded"
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#endif
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#include "catch.hpp"
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#include <string>
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#include <limits>
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struct TestData {
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int int_seven = 7;
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std::string str_hello = "hello";
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float float_nine_point_one = 9.1f;
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double double_pi = 3.1415926535;
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};
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struct TestDef {
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TestDef& operator + ( const std::string& ) {
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return *this;
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}
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TestDef& operator[]( const std::string& ) {
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return *this;
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}
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};
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// The "failing" tests all use the CHECK macro, which continues if the specific test fails.
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// This allows us to see all results, even if an earlier check fails
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// Equality tests
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TEST_CASE( "Equality checks that should succeed" )
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{
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TestDef td;
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td + "hello" + "hello";
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TestData data;
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REQUIRE( data.int_seven == 7 );
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REQUIRE( data.float_nine_point_one == Approx( 9.1f ) );
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REQUIRE( data.double_pi == Approx( 3.1415926535 ) );
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REQUIRE( data.str_hello == "hello" );
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REQUIRE( "hello" == data.str_hello );
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REQUIRE( data.str_hello.size() == 5 );
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double x = 1.1 + 0.1 + 0.1;
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REQUIRE( x == Approx( 1.3 ) );
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}
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TEST_CASE( "Equality checks that should fail", "[.][failing][!mayfail]" )
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{
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TestData data;
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CHECK( data.int_seven == 6 );
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CHECK( data.int_seven == 8 );
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CHECK( data.int_seven == 0 );
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CHECK( data.float_nine_point_one == Approx( 9.11f ) );
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CHECK( data.float_nine_point_one == Approx( 9.0f ) );
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CHECK( data.float_nine_point_one == Approx( 1 ) );
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CHECK( data.float_nine_point_one == Approx( 0 ) );
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CHECK( data.double_pi == Approx( 3.1415 ) );
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CHECK( data.str_hello == "goodbye" );
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CHECK( data.str_hello == "hell" );
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CHECK( data.str_hello == "hello1" );
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CHECK( data.str_hello.size() == 6 );
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double x = 1.1 + 0.1 + 0.1;
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CHECK( x == Approx( 1.301 ) );
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}
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TEST_CASE( "Inequality checks that should succeed" )
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{
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TestData data;
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REQUIRE( data.int_seven != 6 );
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REQUIRE( data.int_seven != 8 );
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REQUIRE( data.float_nine_point_one != Approx( 9.11f ) );
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REQUIRE( data.float_nine_point_one != Approx( 9.0f ) );
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REQUIRE( data.float_nine_point_one != Approx( 1 ) );
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REQUIRE( data.float_nine_point_one != Approx( 0 ) );
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REQUIRE( data.double_pi != Approx( 3.1415 ) );
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REQUIRE( data.str_hello != "goodbye" );
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REQUIRE( data.str_hello != "hell" );
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REQUIRE( data.str_hello != "hello1" );
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REQUIRE( data.str_hello.size() != 6 );
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}
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TEST_CASE( "Inequality checks that should fail", "[.][failing][!shouldfail]" )
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{
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TestData data;
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CHECK( data.int_seven != 7 );
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CHECK( data.float_nine_point_one != Approx( 9.1f ) );
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CHECK( data.double_pi != Approx( 3.1415926535 ) );
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CHECK( data.str_hello != "hello" );
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CHECK( data.str_hello.size() != 5 );
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}
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// Ordering comparison tests
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TEST_CASE( "Ordering comparison checks that should succeed" )
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{
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TestData data;
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REQUIRE( data.int_seven < 8 );
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REQUIRE( data.int_seven > 6 );
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REQUIRE( data.int_seven > 0 );
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REQUIRE( data.int_seven > -1 );
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REQUIRE( data.int_seven >= 7 );
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REQUIRE( data.int_seven >= 6 );
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REQUIRE( data.int_seven <= 7 );
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REQUIRE( data.int_seven <= 8 );
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REQUIRE( data.float_nine_point_one > 9 );
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REQUIRE( data.float_nine_point_one < 10 );
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REQUIRE( data.float_nine_point_one < 9.2 );
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REQUIRE( data.str_hello <= "hello" );
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REQUIRE( data.str_hello >= "hello" );
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REQUIRE( data.str_hello < "hellp" );
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REQUIRE( data.str_hello < "zebra" );
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REQUIRE( data.str_hello > "hellm" );
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REQUIRE( data.str_hello > "a" );
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}
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TEST_CASE( "Ordering comparison checks that should fail", "[.][failing]" )
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{
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TestData data;
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CHECK( data.int_seven > 7 );
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CHECK( data.int_seven < 7 );
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CHECK( data.int_seven > 8 );
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CHECK( data.int_seven < 6 );
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CHECK( data.int_seven < 0 );
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CHECK( data.int_seven < -1 );
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CHECK( data.int_seven >= 8 );
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CHECK( data.int_seven <= 6 );
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CHECK( data.float_nine_point_one < 9 );
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CHECK( data.float_nine_point_one > 10 );
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CHECK( data.float_nine_point_one > 9.2 );
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CHECK( data.str_hello > "hello" );
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CHECK( data.str_hello < "hello" );
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CHECK( data.str_hello > "hellp" );
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CHECK( data.str_hello > "z" );
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CHECK( data.str_hello < "hellm" );
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CHECK( data.str_hello < "a" );
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CHECK( data.str_hello >= "z" );
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CHECK( data.str_hello <= "a" );
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}
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// Comparisons with int literals
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TEST_CASE( "Comparisons with int literals don't warn when mixing signed/ unsigned" )
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{
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int i = 1;
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unsigned int ui = 2;
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long l = 3;
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unsigned long ul = 4;
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char c = 5;
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unsigned char uc = 6;
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REQUIRE( i == 1 );
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REQUIRE( ui == 2 );
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REQUIRE( l == 3 );
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REQUIRE( ul == 4 );
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REQUIRE( c == 5 );
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REQUIRE( uc == 6 );
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REQUIRE( 1 == i );
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REQUIRE( 2 == ui );
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REQUIRE( 3 == l );
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REQUIRE( 4 == ul );
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REQUIRE( 5 == c );
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REQUIRE( 6 == uc );
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REQUIRE( (std::numeric_limits<unsigned long>::max)() > ul );
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}
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// Disable warnings about sign conversions for the next two tests
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// (as we are deliberately invoking them)
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// - Currently only disabled for GCC/ LLVM. Should add VC++ too
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#ifdef __GNUC__
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-compare"
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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#endif
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#ifdef _MSC_VER
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#pragma warning(disable:4389) // '==' : signed/unsigned mismatch
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#endif
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TEST_CASE( "comparisons between int variables" )
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{
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long long_var = 1L;
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unsigned char unsigned_char_var = 1;
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unsigned short unsigned_short_var = 1;
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unsigned int unsigned_int_var = 1;
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unsigned long unsigned_long_var = 1L;
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REQUIRE( long_var == unsigned_char_var );
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REQUIRE( long_var == unsigned_short_var );
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REQUIRE( long_var == unsigned_int_var );
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REQUIRE( long_var == unsigned_long_var );
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}
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TEST_CASE( "comparisons between const int variables" )
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{
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const unsigned char unsigned_char_var = 1;
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const unsigned short unsigned_short_var = 1;
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const unsigned int unsigned_int_var = 1;
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const unsigned long unsigned_long_var = 1L;
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REQUIRE( unsigned_char_var == 1 );
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REQUIRE( unsigned_short_var == 1 );
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REQUIRE( unsigned_int_var == 1 );
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REQUIRE( unsigned_long_var == 1 );
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}
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TEST_CASE( "Comparisons between unsigned ints and negative signed ints match c++ standard behaviour" )
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{
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CHECK( ( -1 > 2u ) );
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CHECK( -1 > 2u );
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CHECK( ( 2u < -1 ) );
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CHECK( 2u < -1 );
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const int minInt = (std::numeric_limits<int>::min)();
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CHECK( ( minInt > 2u ) );
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CHECK( minInt > 2u );
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}
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TEST_CASE( "Comparisons between ints where one side is computed" )
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{
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CHECK( 54 == 6*9 );
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}
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#ifdef __GNUC__
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#pragma GCC diagnostic pop
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#endif
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inline const char* returnsConstNull(){ return nullptr; }
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inline char* returnsNull(){ return nullptr; }
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TEST_CASE( "Pointers can be compared to null" )
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{
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TestData* p = nullptr;
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TestData* pNULL = nullptr;
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REQUIRE( p == nullptr );
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REQUIRE( p == pNULL );
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TestData data;
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p = &data;
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REQUIRE( p != nullptr );
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const TestData* cp = p;
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REQUIRE( cp != nullptr );
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const TestData* const cpc = p;
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REQUIRE( cpc != nullptr );
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REQUIRE( returnsNull() == nullptr );
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REQUIRE( returnsConstNull() == nullptr );
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REQUIRE( nullptr != p );
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}
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// Not (!) tests
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// The problem with the ! operator is that it has right-to-left associativity.
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// This means we can't isolate it when we decompose. The simple REQUIRE( !false ) form, therefore,
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// cannot have the operand value extracted. The test will work correctly, and the situation
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// is detected and a warning issued.
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// An alternative form of the macros (CHECK_FALSE and REQUIRE_FALSE) can be used instead to capture
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// the operand value.
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TEST_CASE( "'Not' checks that should succeed" )
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{
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bool falseValue = false;
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REQUIRE( false == false );
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REQUIRE( true == true );
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REQUIRE( !false );
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REQUIRE_FALSE( false );
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REQUIRE( !falseValue );
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REQUIRE_FALSE( falseValue );
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REQUIRE( !(1 == 2) );
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REQUIRE_FALSE( 1 == 2 );
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}
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TEST_CASE( "'Not' checks that should fail", "[.][failing]" )
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{
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bool trueValue = true;
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CHECK( false != false );
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CHECK( true != true );
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CHECK( !true );
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CHECK_FALSE( true );
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CHECK( !trueValue );
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CHECK_FALSE( trueValue );
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CHECK( !(1 == 1) );
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CHECK_FALSE( 1 == 1 );
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}
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