test: add test_serialize_file

tests/CMakeLists.txt

@@ -25,6 +25,7 @@ set(TEST_NAMES
     test_to_toml
     test_from_toml
     test_parse_file
+    test_serialize_file
     test_parse_unicode
     test_error_detection
 )

tests/test_serialize_file.cpp

@@ -0,0 +1,44 @@
+#define BOOST_TEST_MODULE "test_serialize_file"
+#ifdef UNITTEST_FRAMEWORK_LIBRARY_EXIST
+#include <boost/test/unit_test.hpp>
+#else
+#define BOOST_TEST_NO_LIB
+#include <boost/test/included/unit_test.hpp>
+#endif
+#include <toml.hpp>
+#include <iostream>
+#include <fstream>
+
+
+BOOST_AUTO_TEST_CASE(test_example)
+{
+    const auto data = toml::parse("toml/tests/example.toml");
+    {
+        std::ofstream ofs("tmp1.toml");
+        ofs << data;
+    }
+    const auto serialized = toml::parse("tmp1.toml");
+    BOOST_CHECK(data == serialized);
+}
+
+BOOST_AUTO_TEST_CASE(test_fruit)
+{
+    const auto data = toml::parse("toml/tests/fruit.toml");
+    {
+        std::ofstream ofs("tmp2.toml");
+        ofs << data;
+    }
+    const auto serialized = toml::parse("tmp2.toml");
+    BOOST_CHECK(data == serialized);
+}
+
+BOOST_AUTO_TEST_CASE(test_hard_example)
+{
+    const auto data = toml::parse("toml/tests/hard_example.toml");
+    {
+        std::ofstream ofs("tmp3.toml");
+        ofs << data;
+    }
+    const auto serialized = toml::parse("tmp3.toml");
+    BOOST_CHECK(data == serialized);
+}