Skip enum tests when JSON_DisableEnumSerialization=ON (#4504)

* ✅ skip enum tests when JSON_DisableEnumSerialization=ON

* ✅ skip enum tests when JSON_DisableEnumSerialization=ON

CMakeLists.txt

@@ -40,7 +40,7 @@ endif()
 option(JSON_BuildTests                     "Build the unit tests when BUILD_TESTING is enabled." ${JSON_BuildTests_INIT})
 option(JSON_CI                             "Enable CI build targets." OFF)
 option(JSON_Diagnostics                    "Use extended diagnostic messages." OFF)
-option(JSON_GlobalUDLs                     "Place use-defined string literals in the global namespace." ON)
+option(JSON_GlobalUDLs                     "Place user-defined string literals in the global namespace." ON)
 option(JSON_ImplicitConversions            "Enable implicit conversions." ON)
 option(JSON_DisableEnumSerialization       "Disable default integer enum serialization." OFF)
 option(JSON_LegacyDiscardedValueComparison "Enable legacy discarded value comparison." OFF)
@@ -96,6 +96,10 @@ if (JSON_Diagnostics)
     message(STATUS "Diagnostics enabled")
 endif()
 
+if (NOT JSON_GlobalUDLs)
+    message(STATUS "User-defined string literals are not put in the global namespace")
+endif()
+
 if (JSON_SystemInclude)
     set(NLOHMANN_JSON_SYSTEM_INCLUDE "SYSTEM")
 endif()

tests/src/unit-conversions.cpp

@@ -16,6 +16,11 @@
 
 #include "doctest_compatibility.h"
 
+// skip tests if JSON_DisableEnumSerialization=ON (#4384)
+#if defined(JSON_DISABLE_ENUM_SERIALIZATION) && (JSON_DISABLE_ENUM_SERIALIZATION == 1)
+    #define SKIP_TESTS_FOR_ENUM_SERIALIZATION
+#endif
+
 #define JSON_TESTS_PRIVATE
 #include <nlohmann/json.hpp>
 using nlohmann::json;
@@ -1284,6 +1289,7 @@ TEST_CASE("value conversion")
     }
 #endif
 
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
     SECTION("get an enum")
     {
         enum c_enum { value_1, value_2 };
@@ -1292,6 +1298,7 @@ TEST_CASE("value conversion")
         CHECK(json(value_1).get<c_enum>() == value_1);
         CHECK(json(cpp_enum::value_1).get<cpp_enum>() == cpp_enum::value_1);
     }
+#endif
 
     SECTION("more involved conversions")
     {

tests/src/unit-noexcept.cpp

@@ -12,6 +12,11 @@
 DOCTEST_GCC_SUPPRESS_WARNING_PUSH
 DOCTEST_GCC_SUPPRESS_WARNING("-Wnoexcept")
 
+// skip tests if JSON_DisableEnumSerialization=ON (#4384)
+#if defined(JSON_DISABLE_ENUM_SERIALIZATION) && (JSON_DISABLE_ENUM_SERIALIZATION == 1)
+    #define SKIP_TESTS_FOR_ENUM_SERIALIZATION
+#endif
+
 #include <nlohmann/json.hpp>
 
 using nlohmann::json;
@@ -36,11 +41,15 @@ static_assert(noexcept(json{}), "");
 static_assert(noexcept(nlohmann::to_json(std::declval<json&>(), 2)), "");
 static_assert(noexcept(nlohmann::to_json(std::declval<json&>(), 2.5)), "");
 static_assert(noexcept(nlohmann::to_json(std::declval<json&>(), true)), "");
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
 static_assert(noexcept(nlohmann::to_json(std::declval<json&>(), test {})), "");
+#endif
 static_assert(noexcept(nlohmann::to_json(std::declval<json&>(), pod {})), "");
 static_assert(!noexcept(nlohmann::to_json(std::declval<json&>(), pod_bis{})), "");
 static_assert(noexcept(json(2)), "");
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
 static_assert(noexcept(json(test {})), "");
+#endif
 static_assert(noexcept(json(pod {})), "");
 static_assert(noexcept(std::declval<json>().get<pod>()), "");
 static_assert(!noexcept(std::declval<json>().get<pod_bis>()), "");

tests/src/unit-regression1.cpp

@@ -11,6 +11,11 @@
 // for some reason including this after the json header leads to linker errors with VS 2017...
 #include <locale>
 
+// skip tests if JSON_DisableEnumSerialization=ON (#4384)
+#if defined(JSON_DISABLE_ENUM_SERIALIZATION) && (JSON_DISABLE_ENUM_SERIALIZATION == 1)
+    #define SKIP_TESTS_FOR_ENUM_SERIALIZATION
+#endif
+
 #define JSON_TESTS_PRIVATE
 #include <nlohmann/json.hpp>
 using nlohmann::json;
@@ -169,6 +174,7 @@ TEST_CASE("regression tests 1")
         }
     }
 
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
     SECTION("pull request #71 - handle enum type")
     {
         enum { t = 0, u = 102};
@@ -191,6 +197,7 @@ TEST_CASE("regression tests 1")
             {"game_type", t}
         }));
     }
+#endif
 
     SECTION("issue #76 - dump() / parse() not idempotent")
     {

tests/src/unit-udt.cpp

@@ -12,6 +12,11 @@
 DOCTEST_GCC_SUPPRESS_WARNING_PUSH
 DOCTEST_GCC_SUPPRESS_WARNING("-Wnoexcept")
 
+// skip tests if JSON_DisableEnumSerialization=ON (#4384)
+#if defined(JSON_DISABLE_ENUM_SERIALIZATION) && (JSON_DISABLE_ENUM_SERIALIZATION == 1)
+    #define SKIP_TESTS_FOR_ENUM_SERIALIZATION
+#endif
+
 #include <nlohmann/json.hpp>
 using nlohmann::json;
 #ifdef JSON_TEST_NO_GLOBAL_UDLS
@@ -132,7 +137,11 @@ static void to_json(nlohmann::json& j, const contact& c)
 
 static void to_json(nlohmann::json& j, const contact_book& cb)
 {
-    j = json{{"name", cb.m_book_name}, {"id", cb.m_book_id}, {"contacts", cb.m_contacts}};
+    j = json{{"name", cb.m_book_name},
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
+        {"id", cb.m_book_id},
+#endif
+        {"contacts", cb.m_contacts}};
 }
 
 // operators
@@ -222,7 +231,9 @@ static void from_json(const nlohmann::json& j, contact& c)
 static void from_json(const nlohmann::json& j, contact_book& cb)
 {
     cb.m_book_name = j["name"].get<name>();
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
     cb.m_book_id = j["id"].get<book_id>();
+#endif
     cb.m_contacts = j["contacts"].get<std::vector<contact>>();
 }
 } // namespace udt
@@ -253,14 +264,22 @@ TEST_CASE("basic usage" * doctest::test_suite("udt"))
         CHECK(json("Paris") == json(addr));
         CHECK(json(cpp_programmer) ==
               R"({"person" : {"age":23, "name":"theo", "country":"France"}, "address":"Paris"})"_json);
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
         CHECK(json(large_id) == json(static_cast<std::uint64_t>(1) << 63));
         CHECK(json(large_id) > 0u);
         CHECK(to_string(json(large_id)) == "9223372036854775808");
         CHECK(json(large_id).is_number_unsigned());
+#endif
 
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
         CHECK(
             json(book) ==
             R"({"name":"C++", "id":42, "contacts" : [{"person" : {"age":23, "name":"theo", "country":"France"}, "address":"Paris"}, {"person" : {"age":42, "country":"中华人民共和国", "name":"王芳"}, "address":"Paris"}]})"_json);
+#else
+        CHECK(
+            json(book) ==
+            R"({"name":"C++", "contacts" : [{"person" : {"age":23, "name":"theo", "country":"France"}, "address":"Paris"}, {"person" : {"age":42, "country":"中华人民共和国", "name":"王芳"}, "address":"Paris"}]})"_json);
+#endif
 
     }
 
@@ -272,7 +291,9 @@ TEST_CASE("basic usage" * doctest::test_suite("udt"))
         {
             const auto parsed_book = big_json.get<udt::contact_book>();
             const auto book_name = big_json["name"].get<udt::name>();
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
             const auto book_id = big_json["id"].get<udt::book_id>();
+#endif
             const auto contacts =
                 big_json["contacts"].get<std::vector<udt::contact>>();
             const auto contact_json = big_json["contacts"].at(0);
@@ -292,8 +313,10 @@ TEST_CASE("basic usage" * doctest::test_suite("udt"))
             CHECK(contact == cpp_programmer);
             CHECK(contacts == book.m_contacts);
             CHECK(book_name == udt::name{"C++"});
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
             CHECK(book_id == book.m_book_id);
             CHECK(book == parsed_book);
+#endif
         }
 
         SECTION("via explicit calls to get_to")
@@ -314,7 +337,9 @@ TEST_CASE("basic usage" * doctest::test_suite("udt"))
         {
             const udt::contact_book parsed_book = big_json;
             const udt::name book_name = big_json["name"];
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
             const udt::book_id book_id = big_json["id"];
+#endif
             const std::vector<udt::contact> contacts = big_json["contacts"];
             const auto contact_json = big_json["contacts"].at(0);
             const udt::contact contact = contact_json;
@@ -332,8 +357,10 @@ TEST_CASE("basic usage" * doctest::test_suite("udt"))
             CHECK(contact == cpp_programmer);
             CHECK(contacts == book.m_contacts);
             CHECK(book_name == udt::name{"C++"});
+#ifndef SKIP_TESTS_FOR_ENUM_SERIALIZATION
             CHECK(book_id == static_cast<udt::book_id>(42u));
             CHECK(book == parsed_book);
+#endif
         }
 #endif
     }