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#include <library/cpp/testing/gtest/gtest.h>
 
#include <library/cpp/yt/string/guid.h>
#include <library/cpp/yt/string/format.h>
 
#include <util/string/hex.h>

namespace NYT { 
namespace { 
 
//////////////////////////////////////////////////////////////////////////////// 
 
static_assert(TFormatTraits<TGuid>::HasCustomFormatValue);
 
TString CanonicalToString(TGuid value) 
{ 
   return Sprintf("%x-%x-%x-%x", 
        value.Parts32[3], 
        value.Parts32[2], 
        value.Parts32[1], 
        value.Parts32[0]); 
} 
 
const ui32 TrickyValues[] = {
    0, 0x1, 0x12, 0x123, 0x1234, 0x12345, 0x123456, 0x1234567, 0x12345678
};

TEST(TGuidTest, FormatAllTricky) 
{ 
    for (ui32 a : TrickyValues) { 
        for (ui32 b : TrickyValues) { 
            for (ui32 c : TrickyValues) { 
                for (ui32 d : TrickyValues) { 
                    auto value = TGuid(a, b, c, d); 
                    EXPECT_EQ(CanonicalToString(value), ToString(value)); 
                } 
            } 
        } 
    } 
} 
 
TEST(TGuidTest, FormatAllSymbols) 
{ 
    const auto Value = TGuid::FromString("12345678-abcdef01-12345678-abcdef01"); 
    EXPECT_EQ(CanonicalToString(Value), ToString(Value)); 
} 

TEST(TGuidTest, ByteOrder)
{
    auto guid = TGuid::FromStringHex32("12345678ABCDEF0112345678ABCDEF01");
    TString bytes{reinterpret_cast<const char*>(&(guid.Parts32[0])), 16};
    EXPECT_EQ(HexEncode(bytes), "01EFCDAB7856341201EFCDAB78563412");
}

//////////////////////////////////////////////////////////////////////////////// 
 
} // namespace 
} // namespace NYT