add TryNodeFromJsonString: ability to parse object and check errors without try-catch

1 files changed, 13 insertions, 0 deletions

diff --git a/library/cpp/yson/node/node_ut.cpp b/library/cpp/yson/node/node_ut.cpp
index 448e99f575..728a926283 100644
--- a/library/cpp/yson/node/node_ut.cpp
+++ b/library/cpp/yson/node/node_ut.cpp
@@ -482,3 +482,16 @@ Y_UNIT_TEST_SUITE(YtNodeTest) {
         UNIT_ASSERT_VALUES_EQUAL(node.ChildAs<TString>(0), "yaddayadda");
     }
 }
+
+
+Y_UNIT_TEST_SUITE(YtNodeIoTest) {
+    Y_UNIT_TEST(FromJson) {
+        NYT::TNode node;
+        node = NYT::NodeFromJsonString("1");
+        UNIT_ASSERT_VALUES_EQUAL(node.ConvertTo<int>(), 1);
+        UNIT_ASSERT(!NYT::TryNodeFromJsonString("", node));
+        UNIT_ASSERT_VALUES_EQUAL(node.ConvertTo<int>(), 1);
+        UNIT_ASSERT_EXCEPTION(NYT::NodeFromJsonString(""), yexception);
+        UNIT_ASSERT_VALUES_EQUAL(node.ConvertTo<int>(), 1);
+    }
+}