1 files changed, 35 insertions, 0 deletions
diff --git a/tests/SelfTest/UsageTests/ToStringOptional.tests.cpp b/tests/SelfTest/UsageTests/ToStringOptional.tests.cpp
new file mode 100644
index 0000000..3671771
--- /dev/null
+++ b/tests/SelfTest/UsageTests/ToStringOptional.tests.cpp
@@ -0,0 +1,35 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+
+#define CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER
+#include <catch2/catch_test_macros.hpp>
+
+#if defined(CATCH_CONFIG_CPP17_OPTIONAL)
+
+TEST_CASE( "std::optional<int> -> toString", "[toString][optional][approvals]" ) {
+    using type = std::optional<int>;
+    REQUIRE( "{ }" == ::Catch::Detail::stringify( type{} ) );
+    REQUIRE( "0" == ::Catch::Detail::stringify( type{ 0 } ) );
+}
+
+TEST_CASE( "std::optional<std::string> -> toString", "[toString][optional][approvals]" ) {
+    using type = std::optional<std::string>;
+    REQUIRE( "{ }" == ::Catch::Detail::stringify( type{} ) );
+    REQUIRE( "\"abc\"" == ::Catch::Detail::stringify( type{ "abc" } ) );
+}
+
+TEST_CASE( "std::vector<std::optional<int> > -> toString", "[toString][optional][approvals]" ) {
+    using type = std::vector<std::optional<int> >;
+    REQUIRE( "{ 0, { }, 2 }" == ::Catch::Detail::stringify( type{ 0, {}, 2 } ) );
+}
+
+TEST_CASE( "std::nullopt -> toString", "[toString][optional][approvals]" ) {
+    REQUIRE( "{ }" == ::Catch::Detail::stringify( std::nullopt ) );
+}
+
+#endif // CATCH_INTERNAL_CONFIG_CPP17_OPTIONAL