catch2/projects/SelfTest/TrickyTests.cpp

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/*
* Created by Phil on 09/11/2010.
* Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
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#ifdef __clang__
#pragma clang diagnostic ignored "-Wpadded"
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#endif
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#include "catch.hpp"
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namespace Catch
{
template<>
std::string toString<std::pair<int, int> >( const std::pair<int, int>& value )
{
std::ostringstream oss;
oss << "std::pair( " << value.first << ", " << value.second << " )";
return oss.str();
}
}
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./succeeding/Tricky/std::pair",
"Parsing a std::pair"
)
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{
std::pair<int, int> aNicePair( 1, 2 );
// !TBD: would be nice if this could compile without the extra parentheses
REQUIRE( (std::pair<int, int>( 1, 2 )) == aNicePair );
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}
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./inprogress/failing/Tricky/trailing expression",
"Where the is more to the expression after the RHS"
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)
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{
/*
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int a = 1;
int b = 2;
// This only captures part of the expression, but issues a warning about the rest
REQUIRE( a == 2 || b == 2 );
*/
WARN( "Uncomment the code in this test to check that it gives a sensible compiler error" );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./inprogress/failing/Tricky/compound lhs",
"Where the LHS is not a simple value"
)
{
/*
int a = 1;
int b = 2;
// This only captures part of the expression, but issues a warning about the rest
REQUIRE( a+1 == b-1 );
*/
WARN( "Uncomment the code in this test to check that it gives a sensible compiler error" );
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}
struct Opaque
{
int val;
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bool operator ==( const Opaque& o ) const
{
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return val == o.val;
}
};
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./failing/Tricky/non streamable type",
"A failing expression with a non streamable type is still captured"
)
{
Opaque o1, o2;
o1.val = 7;
o2.val = 8;
CHECK( &o1 == &o2 );
CHECK( o1 == o2 );
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}
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./failing/string literals",
"string literals of different sizes can be compared"
)
{
REQUIRE( std::string( "first" ) == "second" );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./succeeding/side-effects",
"An expression with side-effects should only be evaluated once"
)
{
int i = 7;
REQUIRE( i++ == 7 );
REQUIRE( i++ == 8 );
}
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namespace A {
struct X
{
X() : a(4), b(2), c(7) {}
X(int v) : a(v), b(2), c(7) {}
int a;
int b;
int c;
};
}
namespace B {
struct Y
{
Y() : a(4), b(2), c(7) {}
Y(int v) : a(v), b(2), c(7) {}
int a;
int b;
int c;
};
}
inline bool operator==(const A::X& lhs, const B::Y& rhs)
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{
return (lhs.a == rhs.a);
}
inline bool operator==(const B::Y& lhs, const A::X& rhs)
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{
return (lhs.a == rhs.a);
}
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///////////////////////////////////////////////////////////////////////////////
/* This, currently, does not compile with LLVM
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TEST_CASE
(
"./succeeding/koenig",
"Operators at different namespace levels not hijacked by Koenig lookup"
)
{
A::X x;
B::Y y;
REQUIRE( x == y );
}
*/
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namespace ObjectWithConversions
{
struct Object
{
operator unsigned int() {return 0xc0000000;}
};
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"./succeeding/koenig",
"Operators at different namespace levels not hijacked by Koenig lookup"
)
{
Object o;
REQUIRE(0xc0000000 == o );
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}
}
namespace ObjectWithNonConstEqualityOperator
{
struct Test
{
Test( unsigned int v )
: m_value(v)
{}
bool operator==( const Test&rhs )
{
return (m_value == rhs.m_value);
}
bool operator==( const Test&rhs ) const
{
return (m_value != rhs.m_value);
}
unsigned int m_value;
};
TEST_CASE("./succeeding/non-const==", "Demonstrate that a non-const == is not used")
{
Test t( 1 );
REQUIRE( t == 1u );
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}
}
namespace EnumBitFieldTests
{
enum Bits {bit0 = 0x0001, bit1 = 0x0002, bit2 = 0x0004, bit3 = 0x0008, bit1and2 = 0x0006,
bit30 = 0x40000000, bit31 = 0x80000000,
bit30and31 = 0xc0000000};
TEST_CASE("./succeeding/enum/bits", "Test enum bit values")
{
REQUIRE( 0xc0000000 == bit30and31 );
}
}
struct Obj
{
Obj():prop(&p){}
int p;
int* prop;
};
TEST_CASE("./succeeding/boolean member", "")
{
Obj obj;
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REQUIRE( obj.prop != NULL );
}
// Tests for a problem submitted by Ralph McArdell
//
// The static bool value should not need to be defined outside the
// struct it is declared in - but when evaluating it in a deduced
// context it appears to require the extra definition.
// The issue was fixed by adding bool overloads to bypass the
// templates that were deduce it.
template <bool B>
struct is_true
{
static const bool value = B;
};
TEST_CASE( "./succeeding/unimplemented static bool", "static bools can be evaluated" )
{
SECTION("compare to true","")
{
REQUIRE( is_true<true>::value == true );
REQUIRE( true == is_true<true>::value );
}
SECTION("compare to false","")
{
REQUIRE( is_true<false>::value == false );
REQUIRE( false == is_true<false>::value );
}
SECTION("negation", "")
{
REQUIRE( !is_true<false>::value );
}
SECTION("double negation","")
{
REQUIRE( !!is_true<true>::value );
}
SECTION("direct","")
{
REQUIRE( is_true<true>::value );
REQUIRE_FALSE( is_true<false>::value );
}
}
// Uncomment these tests to produce an error at test registration time
/*
TEST_CASE( "./sameName", "Tests with the same name are not allowed" )
{
}
TEST_CASE( "./sameName", "Tests with the same name are not allowed" )
{
}
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*/