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#include "internal/catch_stringref.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();
}
};
namespace {
auto isOwned( StringRef const& stringRef ) -> bool {
return StringRefTestAccess::isOwned( stringRef );
}
auto isSubstring( StringRef const& stringRef ) -> bool {
return StringRefTestAccess::isSubstring( stringRef );
}
} // end anonymous namespace
} // namespace Catch
TEST_CASE( "StringRef", "[Strings][StringRef]" ) {
using Catch::StringRef;
using Catch::isOwned; using Catch::isSubstring;
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 = s.currentData();
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( 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 = ss.currentData();
REQUIRE( rawChars == s.currentData() ); // same pointer value
REQUIRE( ss.c_str() != rawChars );
REQUIRE( isOwned( ss ) );
SECTION( "Self-assignment after substring" ) {
ss = *&ss; // the *& are there to suppress warnings (see: "Improvements to Clang's diagnostics" in https://rev.ng/gitlab/revng-bar-2019/clang/raw/master/docs/ReleaseNotes.rst)
REQUIRE( isOwned(ss) == false );
REQUIRE( ss == "hello" );
REQUIRE( rawChars == ss.currentData() ); // same 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("Past the end substring") {
REQUIRE(s.substr(s.size() + 1, 123).empty());
}
}
SECTION( "Comparisons" ) {
REQUIRE( StringRef("hello") == StringRef("hello") );
REQUIRE( StringRef("hello") != StringRef("cello") );
}
SECTION( "from std::string" ) {
std::string stdStr = "a standard string";
SECTION( "implicitly constructed" ) {
StringRef sr = stdStr;
REQUIRE( sr == "a standard string" );
REQUIRE( sr.size() == stdStr.size() );
}
SECTION( "explicitly constructed" ) {
StringRef sr( stdStr );
REQUIRE( sr == "a standard string" );
REQUIRE( sr.size() == stdStr.size() );
}
SECTION( "assigned" ) {
StringRef sr;
sr = stdStr;
REQUIRE( sr == "a standard string" );
REQUIRE( sr.size() == stdStr.size() );
}
}
SECTION( "to std::string" ) {
StringRef sr = "a stringref";
SECTION( "explicitly constructed" ) {
std::string stdStr( sr );
REQUIRE( stdStr == "a stringref" );
REQUIRE( stdStr.size() == sr.size() );
}
SECTION( "assigned" ) {
std::string stdStr;
stdStr = static_cast<std::string>(sr);
REQUIRE( stdStr == "a stringref" );
REQUIRE( stdStr.size() == sr.size() );
}
}
}
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