statetest: Make JSON _info section optional

Author: hugo-dc

test/statetest/statetest_loader.cpp

@@ -397,10 +397,13 @@ static void from_json(const json::json& j, StateTransitionTest& o)
 
     o.block = from_json<state::BlockInfo>(j_t.at("env"));
 
-    if (const auto& info = j_t.at("_info"); info.contains("labels"))
+    if (const auto info_it = j_t.find("_info"); info_it != j_t.end())
     {
-        for (const auto& [j_id, j_label] : info.at("labels").items())
-            o.input_labels.emplace(from_json<uint64_t>(j_id), j_label);
+        if (const auto labels_it = info_it->find("labels"); labels_it != info_it->end())
+        {
+            for (const auto& [j_id, j_label] : labels_it->items())
+                o.input_labels.emplace(from_json<uint64_t>(j_id), j_label);
+        }
     }
 
     for (const auto& [rev_name, expectations] : j_t.at("post").items())

test/unittests/statetest_loader_test.cpp

@@ -74,7 +74,6 @@ TEST(statetest_loader, load_minimal_test)
 {
     std::istringstream s{R"({
         "test": {
-            "_info": {},
             "pre": {},
             "transaction": {
                 "gasPrice": "",