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, 81 insertions, 0 deletions

diff --git a/yt/cpp/mapreduce/interface/error_ut.cpp b/yt/cpp/mapreduce/interface/error_ut.cpp
new file mode 100644
index 0000000000..03f2751b23
--- /dev/null
+++ b/yt/cpp/mapreduce/interface/error_ut.cpp
@@ -0,0 +1,81 @@
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <library/cpp/json/json_reader.h>
+
+#include <yt/cpp/mapreduce/interface/errors.h>
+#include <yt/cpp/mapreduce/common/helpers.h>
+
+using namespace NYT;
+
+template<>
+void Out<NYT::TNode>(IOutputStream& s, const NYT::TNode& node)
+{
+    s << "TNode:" << NodeToYsonString(node);
+}
+
+Y_UNIT_TEST_SUITE(ErrorSuite)
+{
+    Y_UNIT_TEST(TestParseJson)
+    {
+        // Scary real world error! Бу!
+        const char* jsonText =
+            R"""({)"""
+                R"""("code":500,)"""
+                R"""("message":"Error resolving path //home/user/link",)"""
+                R"""("attributes":{)"""
+                    R"""("fid":18446484571700269066,)"""
+                    R"""("method":"Create",)"""
+                    R"""("tid":17558639495721339338,)"""
+                    R"""("datetime":"2017-04-07T13:38:56.474819Z",)"""
+                    R"""("pid":414529,)"""
+                    R"""("host":"build01-01g.yt.yandex.net"},)"""
+                R"""("inner_errors":[{)"""
+                    R"""("code":1,)"""
+                    R"""("message":"Node //tt cannot have children",)"""
+                    R"""("attributes":{)"""
+                        R"""("fid":18446484571700269066,)"""
+                        R"""("tid":17558639495721339338,)"""
+                        R"""("datetime":"2017-04-07T13:38:56.474725Z",)"""
+                        R"""("pid":414529,)"""
+                        R"""("host":"build01-01g.yt.yandex.net"},)"""
+                    R"""("inner_errors":[]}]})""";
+
+        NJson::TJsonValue jsonValue;
+        ReadJsonFastTree(jsonText, &jsonValue, /*throwOnError=*/ true);
+
+        TYtError error(jsonValue);
+        UNIT_ASSERT_VALUES_EQUAL(error.GetCode(), 500);
+        UNIT_ASSERT_VALUES_EQUAL(error.GetMessage(), R"""(Error resolving path //home/user/link)""");
+        UNIT_ASSERT_VALUES_EQUAL(error.InnerErrors().size(), 1);
+        UNIT_ASSERT_VALUES_EQUAL(error.InnerErrors()[0].GetCode(), 1);
+
+        UNIT_ASSERT_VALUES_EQUAL(error.HasAttributes(), true);
+        UNIT_ASSERT_VALUES_EQUAL(error.GetAttributes().at("method"), TNode("Create"));
+
+        UNIT_ASSERT_VALUES_EQUAL(error.GetAllErrorCodes(), TSet<int>({500, 1}));
+    }
+
+    Y_UNIT_TEST(TestGetYsonText) {
+        const char* jsonText =
+            R"""({)"""
+                R"""("code":500,)"""
+                R"""("message":"outer error",)"""
+                R"""("attributes":{)"""
+                    R"""("method":"Create",)"""
+                    R"""("pid":414529},)"""
+                R"""("inner_errors":[{)"""
+                    R"""("code":1,)"""
+                    R"""("message":"inner error",)"""
+                    R"""("attributes":{},)"""
+                    R"""("inner_errors":[])"""
+                R"""(}]})""";
+        TYtError error;
+        error.ParseFrom(jsonText);
+        TString ysonText = error.GetYsonText();
+        TYtError error2(NodeFromYsonString(ysonText));
+        UNIT_ASSERT_EQUAL(
+            ysonText,
+            R"""({"code"=500;"message"="outer error";"attributes"={"method"="Create";"pid"=414529};"inner_errors"=[{"code"=1;"message"="inner error"}]})""");
+        UNIT_ASSERT_EQUAL(error2.GetYsonText(), ysonText);
+    }
+}