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#include "iterators.h" 
#include "simple_reflection.h" 
#include <library/cpp/protobuf/util/ut/common_ut.pb.h>
 
#include <library/cpp/testing/unittest/registar.h>
 
#include <util/generic/algorithm.h> 
 
using NProtoBuf::TFieldsIterator; 
using NProtoBuf::TConstField; 
 
Y_UNIT_TEST_SUITE(Iterators) {
    Y_UNIT_TEST(Count) {
        const NProtobufUtilUt::TWalkTest proto; 
        const NProtoBuf::Descriptor* d = proto.GetDescriptor(); 
        TFieldsIterator dbegin(d), dend(d, d->field_count()); 
        size_t steps = 0; 
 
        UNIT_ASSERT_EQUAL(dbegin, begin(*d)); 
        UNIT_ASSERT_EQUAL(dend, end(*d)); 
 
        for (; dbegin != dend; ++dbegin) 
            ++steps; 
        UNIT_ASSERT_VALUES_EQUAL(steps, d->field_count()); 
    } 
 
    Y_UNIT_TEST(RangeFor) { 
        size_t steps = 0, values = 0; 
        NProtobufUtilUt::TWalkTest proto; 
        proto.SetOptStr("yandex"); 
        for (const auto& field : *proto.GetDescriptor()) { 
            values += TConstField(proto, field).HasValue(); 
            ++steps; 
        } 
        UNIT_ASSERT_VALUES_EQUAL(steps, proto.GetDescriptor()->field_count()); 
        UNIT_ASSERT_VALUES_EQUAL(values, 1); 
    } 
 
    Y_UNIT_TEST(AnyOf) {
        NProtobufUtilUt::TWalkTest proto; 
        const NProtoBuf::Descriptor* d = proto.GetDescriptor(); 
        TFieldsIterator begin(d), end(d, d->field_count()); 
        UNIT_ASSERT(!AnyOf(begin, end, [&proto](const NProtoBuf::FieldDescriptor* f){ 
            return TConstField(proto, f).HasValue(); 
        })); 
 
        proto.SetOptStr("yandex"); 
        UNIT_ASSERT(AnyOf(begin, end, [&proto](const NProtoBuf::FieldDescriptor* f){ 
            return TConstField(proto, f).HasValue(); 
        })); 
    } 
}