YT-19324: move YT provider to ydb/library/yql

This commit is formed by the following script: https://paste.yandex-team.ru/6f92e4b8-efc5-4d34-948b-15ee2accd7e7/text.
This commit has zero effect on all projects that depend on YQL.

The summary of changes:
- `yql/providers/yt -> ydb/library/yql/providers/yt `- the whole implementation of YT provider is moved into YDB code base for further export as a part of YT YQL plugin shared library;
- `yql/providers/stat/{expr_nodes,uploader} -> ydb/library/yql/providers/stat/{expr_nodes,uploader}` - a small interface without implementation and the description of stat expr nodes;
- `yql/core/extract_predicate/ut -> ydb/library/yql/core/extract_predicate/ut`;
- `yql/core/{ut,ut_common} -> ydb/library/yql/core/{ut,ut_common}`;
- `yql/core` is gone;
- `yql/library/url_preprocessing -> ydb/library/yql/core/url_preprocessing`.

**NB**: all new targets inside `ydb/` are under `IF (NOT CMAKE_EXPORT)` clause which disables them from open-source cmake generation and ya make build. They will be enabled in the subsequent commits.

1 files changed, 49 insertions, 0 deletions

diff --git a/yt/cpp/mapreduce/interface/serialize_ut.cpp b/yt/cpp/mapreduce/interface/serialize_ut.cpp
new file mode 100644
index 0000000000..59d4501ee8
--- /dev/null
+++ b/yt/cpp/mapreduce/interface/serialize_ut.cpp
@@ -0,0 +1,49 @@
+#include <yt/cpp/mapreduce/interface/serialize.h>
+#include <yt/cpp/mapreduce/interface/common.h>
+
+#include <library/cpp/yson/node/node_builder.h>
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/generic/serialized_enum.h>
+
+using namespace NYT;
+
+Y_UNIT_TEST_SUITE(Serialization)
+{
+    Y_UNIT_TEST(TableSchema)
+    {
+        auto schema = TTableSchema()
+            .AddColumn(TColumnSchema().Name("a").Type(EValueType::VT_STRING).SortOrder(SO_ASCENDING))
+            .AddColumn(TColumnSchema().Name("b").Type(EValueType::VT_UINT64))
+            .AddColumn(TColumnSchema().Name("c").Type(EValueType::VT_INT64, true));
+
+        auto schemaNode = schema.ToNode();
+        UNIT_ASSERT(schemaNode.IsList());
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode.Size(), 3);
+
+
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[0]["name"], "a");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[0]["type"], "string");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[0]["required"], false);
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[0]["sort_order"], "ascending");
+
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[1]["name"], "b");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[1]["type"], "uint64");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[1]["required"], false);
+
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[2]["name"], "c");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[2]["type"], "int64");
+        UNIT_ASSERT_VALUES_EQUAL(schemaNode[2]["required"], true);
+    }
+
+    Y_UNIT_TEST(ValueTypeSerialization)
+    {
+        for (const auto value : GetEnumAllValues<EValueType>()) {
+            TNode serialized = NYT::NDetail::ToString(value);
+            EValueType deserialized;
+            Deserialize(deserialized, serialized);
+            UNIT_ASSERT_VALUES_EQUAL(value, deserialized);
+        }
+    }
+}