#include <gtest/gtest.h>

#include "../src/nfc.hh"   // for illegal_utf8 exception
#include <vector>

using namespace pEp;
using std::string_view;

namespace {

struct TestEntry
{
	string_view input;
	string_view nfc;
};

typedef TestEntry TE;


std::ostream& operator<<(std::ostream& o, const TestEntry& tt)
{
	return o << "input=«" << tt.input << "», nfc=«" << tt.nfc << "» ";
}

} // end of anonymous namespace


TEST( NfcTestString, Simple )
{
	pEp::nfc_string s;
	EXPECT_TRUE( s.empty() );
	EXPECT_EQ( s.size(), 0 );
	
	s.reserve(1000);
	EXPECT_GE(s.capacity(), 1000);
	
	s = "Ha\u0308user"; // non-NFC input will be normalized.
	EXPECT_NE( s.get(), std::string("Ha\u0308user") );
	EXPECT_EQ( s.get(), std::string("Häuser") );
	
	s.insert(0, "U\u0308ber");
	EXPECT_EQ( s.get(), std::string("ÜberHäuser") );
	
	s += "\u0328\u030c"; // COMBINING OGONEK (below), COMBINING CARON (above)
	// r absorbs the caron into U+0159, the combining ogonek remains separate
	EXPECT_EQ( s.get(), std::string("ÜberHäuse\u0159\u0328") );
	EXPECT_EQ( s.size(), 15);
	
	EXPECT_THROW( s.substr(1), pEp::illegal_utf );
	EXPECT_THROW( s.substr(2, 10), pEp::illegal_utf );
	
	// removal of the r-with-caron let the remaining ogonek combine with the e to U+0119 (E WITH OGONEK)
	EXPECT_EQ( s.erase(11, 2).get(), "ÜberHäus\u0119" );
}


TEST( NfcTestString, Exceptions )
{
	pEp::nfc_string s;
	EXPECT_THROW( s = "Meep\xc0\x80.", pEp::illegal_utf );
}