From b1827e6fca5e0f26cc486390fc3672717c4d52a7 Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Fri, 20 Dec 2019 19:34:02 +0900
Subject: [PATCH] test: check immutability of inline tables

---
 tests/test_parse_inline_table.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/test_parse_inline_table.cpp b/tests/test_parse_inline_table.cpp
index e1934a5..5fa99c1 100644
--- a/tests/test_parse_inline_table.cpp
+++ b/tests/test_parse_inline_table.cpp
@@ -46,3 +46,19 @@ BOOST_AUTO_TEST_CASE(test_inline_table_value)
         TOML11_TEST_PARSE_EQUAL_VALUE(parse_value<toml::value>, "{type.name = \"pug\"}", value(t));
     }
 }
+
+BOOST_AUTO_TEST_CASE(test_inline_table_immutability)
+{
+    {
+        std::istringstream stream(std::string(
+                "a = {b = 1}\n"
+                "a.c = 2\n"));
+        BOOST_CHECK_THROW(toml::parse(stream), toml::syntax_error);
+    }
+    {
+        std::istringstream stream(std::string(
+                "a = {b = {c = 1}}\n"
+                "a.b.d = 2\n"));
+        BOOST_CHECK_THROW(toml::parse(stream), toml::syntax_error);
+    }
+}