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
#ifdef _MSC_VER
#pragma warning (disable : 4702) // Disable unreachable code warning for the last test
// that is triggered when compiling as Win32|Release
#endif
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#include <stdio.h>
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#include "catch.hpp"
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namespace Catch {
std::string toString( const std::pair<int, int>& value ) {
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std::ostringstream oss;
oss << "std::pair( " << value.first << ", " << value.second << " )";
return oss.str();
}
}
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Parsing a std::pair",
"[Tricky][std::pair]"
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)
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{
std::pair<int, int> aNicePair( 1, 2 );
REQUIRE( (std::pair<int, int>( 1, 2 )) == aNicePair );
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}
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///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
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"Where there is more to the expression after the RHS",
"[Tricky][failing][.]"
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)
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{
// int a = 1, b = 2;
// REQUIRE( a == 2 || b == 2 );
WARN( "Uncomment the code in this test to check that it gives a sensible compiler error" );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
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"Where the LHS is not a simple value",
"[Tricky][failing][.]"
)
{
/*
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
(
"A failing expression with a non streamable type is still captured",
"[Tricky][failing][.]"
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)
{
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
(
"string literals of different sizes can be compared",
"[Tricky][failing][.]"
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)
{
REQUIRE( std::string( "first" ) == "second" );
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}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"An expression with side-effects should only be evaluated once",
"[Tricky]"
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)
{
int i = 7;
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REQUIRE( i++ == 7 );
REQUIRE( i++ == 8 );
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}
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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
(
"Operators at different namespace levels not hijacked by Koenig lookup"
"[Tricky]"
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)
{
A::X x;
B::Y y;
REQUIRE( x == y );
}
*/
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namespace ObjectWithConversions
{
struct Object
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{
operator unsigned int() {return 0xc0000000;}
};
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Operators at different namespace levels not hijacked by Koenig lookup",
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"[Tricky][approvals]"
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)
{
Object o;
REQUIRE(0xc0000000 == o );
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}
}
namespace ObjectWithNonConstEqualityOperator
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{
struct Test
{
Test( unsigned int v )
: m_value(v)
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{}
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bool operator==( const Test&rhs )
{
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return (m_value == rhs.m_value);
}
bool operator==( const Test&rhs ) const
{
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return (m_value != rhs.m_value);
}
unsigned int m_value;
};
TEST_CASE("Demonstrate that a non-const == is not used", "[Tricky]" )
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{
Test t( 1 );
REQUIRE( t == 1u );
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}
}
namespace EnumBitFieldTests
{
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enum Bits : uint32_t {
bit0 = 0x0001,
bit1 = 0x0002,
bit2 = 0x0004,
bit3 = 0x0008,
bit1and2 = bit1 | bit2,
bit30 = 0x40000000,
bit31 = 0x80000000,
bit30and31 = bit30 | bit31
};
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TEST_CASE( "Test enum bit values", "[Tricky]" )
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{
REQUIRE( 0xc0000000 == bit30and31 );
}
}
struct Obj
{
Obj():prop(&p){}
int p;
int* prop;
};
TEST_CASE("boolean member", "[Tricky]")
{
Obj obj;
REQUIRE( obj.prop != nullptr );
}
// 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 there to deduce it.
template <bool B>
struct is_true
{
static const bool value = B;
};
TEST_CASE( "(unimplemented) static bools can be evaluated", "[Tricky]" )
{
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( "Tests with the same name are not allowed", "[Tricky]" )
{
}
TEST_CASE( "Tests with the same name are not allowed", "[Tricky]" )
{
}
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*/
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struct Boolable
{
explicit Boolable( bool value ) : m_value( value ) {}
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explicit operator bool() const {
return m_value;
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}
bool m_value;
};
TEST_CASE( "Objects that evaluated in boolean contexts can be checked", "[Tricky][SafeBool]" )
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{
Boolable True( true );
Boolable False( false );
CHECK( True );
CHECK( !False );
CHECK_FALSE( False );
}
TEST_CASE( "Assertions then sections", "[Tricky]" )
{
// This was causing a failure due to the way the console reporter was handling
// the current section
REQUIRE( Catch::alwaysTrue() );
SECTION( "A section" )
{
REQUIRE( Catch::alwaysTrue() );
SECTION( "Another section" )
{
REQUIRE( Catch::alwaysTrue() );
}
SECTION( "Another other section" )
{
REQUIRE( Catch::alwaysTrue() );
}
}
}
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struct Awkward
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{
operator int() const { return 7; }
};
TEST_CASE( "non streamable - with conv. op", "[Tricky]" )
{
Awkward awkward;
std::string s = ::Catch::Detail::stringify( awkward );
REQUIRE( s == "7" );
}
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inline void foo() {}
typedef void (*fooptr_t)();
TEST_CASE( "Comparing function pointers", "[Tricky][function pointer]" )
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{
// This was giving a warning in VS2010
// #179
fooptr_t a = foo;
REQUIRE( a );
REQUIRE( a == &foo );
}
struct S
{
void f() {}
};
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TEST_CASE( "Comparing member function pointers", "[Tricky][member function pointer][approvals]" )
{
typedef void (S::*MF)();
MF m = &S::f;
CHECK( m == &S::f );
}
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class ClassName {};
TEST_CASE( "pointer to class", "[Tricky]" )
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{
ClassName *p = 0;
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REQUIRE( p == 0 );
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}
#include <memory>
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TEST_CASE( "null_ptr", "[Tricky]" )
{
std::unique_ptr<int> ptr;
REQUIRE(ptr.get() == nullptr);
}
TEST_CASE( "X/level/0/a", "[Tricky]" ) { SUCCEED(""); }
TEST_CASE( "X/level/0/b", "[Tricky][fizz]" ){ SUCCEED(""); }
TEST_CASE( "X/level/1/a", "[Tricky]" ) { SUCCEED(""); }
TEST_CASE( "X/level/1/b", "[Tricky]" ) { SUCCEED(""); }
TEST_CASE( "has printf" ) {
// This can cause problems as, currently, stdout itself is not redirected - only the cout (and cerr) buffer
printf( "loose text artifact\n" );
}
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TEST_CASE( "assertions with commas are allowed" ) {
}
namespace {
struct constructor_throws {
constructor_throws() {
throw 1;
}
};
}
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TEST_CASE("Commas in various macros are allowed") {
REQUIRE_THROWS( std::vector<constructor_throws>{constructor_throws{}, constructor_throws{}} );
CHECK_THROWS( std::vector<constructor_throws>{constructor_throws{}, constructor_throws{}} );
REQUIRE_NOTHROW( std::vector<int>{1, 2, 3} == std::vector<int>{1, 2, 3} );
CHECK_NOTHROW( std::vector<int>{1, 2, 3} == std::vector<int>{1, 2, 3} );
REQUIRE(std::vector<int>{1, 2} == std::vector<int>{1, 2});
CHECK( std::vector<int>{1, 2} == std::vector<int>{1, 2} );
REQUIRE_FALSE(std::vector<int>{1, 2} == std::vector<int>{1, 2, 3});
CHECK_FALSE( std::vector<int>{1, 2} == std::vector<int>{1, 2, 3} );
CHECK_NOFAIL( std::vector<int>{1, 2} == std::vector<int>{1, 2} );
CHECKED_IF( std::vector<int>{1, 2} == std::vector<int>{1, 2} ) {
REQUIRE(true);
} CHECKED_ELSE( std::vector<int>{1, 2} == std::vector<int>{1, 2} ) {
CHECK(true);
}
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}
TEST_CASE( "null deref", "[.][failing][!nonportable]" ) {
CHECK( false );
int *x = NULL;
*x = 1;
}
TEST_CASE( "non-copyable objects", "[.][failing]" ) {
// Thanks to Agustin Bergé (@k-ballo on the cpplang Slack) for raising this
std::type_info const& ti = typeid(int);
CHECK( ti == typeid(int) );
}