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#include "../include/internal/catch_stringref.h"
#include "../include/internal/catch_string.h"
#include "catch.hpp"
#include <cstring>
namespace Catch {
// Implementation of test accessors
struct StringRefTestAccess {
static auto isOwned( StringRef const& stringRef ) -> bool {
return stringRef.isOwned();
}
static auto isSubstring( StringRef const& stringRef ) -> bool {
return stringRef.isSubstring();
}
static auto data( StringRef const& stringRef ) -> char const* {
return stringRef.data();
}
};
auto isOwned( StringRef const& stringRef ) -> bool {
return StringRefTestAccess::isOwned( stringRef );
}
auto isSubstring( StringRef const& stringRef ) -> bool {
return StringRefTestAccess::isSubstring( stringRef );
}
auto data( StringRef const& stringRef ) -> char const* {
return StringRefTestAccess::data( stringRef );
}
} // namespace Catch2
namespace Catch {
inline auto toString( Catch::StringRef const& stringRef ) -> std::string {
return std::string( data( stringRef ), stringRef.size() );
}
} // namespace Catch
TEST_CASE( "StringRef", "[Strings]" ) {
using Catch::StringRef;
using Catch::String;
SECTION( "Empty string" ) {
StringRef empty;
REQUIRE( empty.empty() );
REQUIRE( empty.size() == 0 );
REQUIRE( std::strcmp( empty.c_str(), "" ) == 0 );
}
SECTION( "From string literal" ) {
StringRef s = "hello";
REQUIRE( s.empty() == false );
REQUIRE( s.size() == 5 );
REQUIRE( isSubstring( s ) == false );
auto rawChars = data( s );
REQUIRE( std::strcmp( rawChars, "hello" ) == 0 );
SECTION( "c_str() does not cause copy" ) {
REQUIRE( isOwned( s ) == false );
REQUIRE( s.c_str() == rawChars );
REQUIRE( isOwned( s ) == false );
}
}
SECTION( "From sub-string" ) {
StringRef original = StringRef( "original string" ).substr(0, 8);
REQUIRE( original == "original" );
REQUIRE( isSubstring( original ) );
REQUIRE( isOwned( original ) == false );
original.c_str(); // Forces it to take ownership
REQUIRE( isSubstring( original ) == false );
REQUIRE( isOwned( original ) );
}
SECTION( "Substrings" ) {
StringRef s = "hello world!";
StringRef ss = s.substr(0, 5);
SECTION( "zero-based substring" ) {
REQUIRE( ss.empty() == false );
REQUIRE( ss.size() == 5 );
REQUIRE( std::strcmp( ss.c_str(), "hello" ) == 0 );
REQUIRE( ss == "hello" );
}
SECTION( "c_str() causes copy" ) {
REQUIRE( isSubstring( ss ) );
REQUIRE( isOwned( ss ) == false );
auto rawChars = data( ss );
REQUIRE( rawChars == data( s ) ); // same pointer value
REQUIRE( ss.c_str() != rawChars );
REQUIRE( isSubstring( ss ) == false );
REQUIRE( isOwned( ss ) );
REQUIRE( data( ss ) != data( s ) ); // different pointer value
}
SECTION( "non-zero-based substring") {
ss = s.substr( 6, 6 );
REQUIRE( ss.size() == 6 );
REQUIRE( std::strcmp( ss.c_str(), "world!" ) == 0 );
}
SECTION( "Pointer values of full refs should match" ) {
StringRef s2 = s;
REQUIRE( s.c_str() == s2.c_str() );
}
SECTION( "Pointer values of substring refs should not match" ) {
REQUIRE( s.c_str() != ss.c_str() );
}
}
SECTION( "Comparisons" ) {
REQUIRE( StringRef("hello") == StringRef("hello") );
REQUIRE( StringRef("hello") != StringRef("cello") );
}
SECTION( "From string" ) {
String str = "hot potato";
auto originalPointer = str.c_str();
SECTION( "Copied" ) {
// After a String is "copied" to a StringRef
// It has only copied the pointer and size
// - it does not take ownership
StringRef copied = str;
REQUIRE( copied == "hot potato" );
REQUIRE( str == "hot potato" );
REQUIRE( isOwned( copied ) == false );
REQUIRE( data( copied ) == originalPointer );
}
SECTION( "Moved" ) {
// After a String is *moved* to a StringRef
// The StringRef takes ownership of the underlying data
// and the String is left in an empty state
StringRef copied = std::move( str );
REQUIRE( copied == "hot potato" );
REQUIRE( isOwned( copied ) );
REQUIRE( str.empty() );
REQUIRE( data( copied ) == originalPointer );
}
}
}
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