1 files changed, 13 insertions, 0 deletions
diff --git a/spec/test_luatool.lua b/spec/test_luatool.lua
index d002bca..62f9283 100644
--- a/spec/test_luatool.lua
+++ b/spec/test_luatool.lua
@@ -57,6 +57,19 @@ return {
         assert(env.print() == nil)
     end },
 
+    { "the guest json codec round-trips and reports bad input instead of raising", function()
+        local env = luatool.build_env()
+        local encoded = env.json.encode({ prs = { 124, 125 } })
+        has(encoded, "124")
+        local decoded = env.json.decode(encoded)
+        assert(type(decoded) == "table" and decoded.prs[2] == 125)
+        -- The sandbox has no pcall, so a raising decoder would kill a workflow
+        -- over one malformed agent line.
+        local value, message = env.json.decode("RESULT=not json")
+        assert(value == nil and type(message) == "string")
+        assert(env.json.decode(nil) == nil)
+    end },
+
     { "the string metatable stays reachable and harmless", function()
         local env = luatool.build_env()
         assert(type(("").dump) == "function")