1 files changed, 120 insertions, 0 deletions
diff --git a/tests/SelfTest/IntrospectiveTests/ToString.tests.cpp b/tests/SelfTest/IntrospectiveTests/ToString.tests.cpp
new file mode 100644
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+++ b/tests/SelfTest/IntrospectiveTests/ToString.tests.cpp
@@ -0,0 +1,120 @@
+
+//              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
+
+#include <catch2/internal/catch_enum_values_registry.hpp>
+#include <catch2/matchers/catch_matchers_string.hpp>
+#include <catch2/matchers/catch_matchers_vector.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_template_test_macros.hpp>
+
+#include <chrono>
+
+enum class EnumClass3 { Value1, Value2, Value3, Value4 };
+
+struct UsesSentinel {
+    using const_iterator = int const*;
+    using const_sentinel = std::nullptr_t;
+
+    const_iterator begin() const { return nullptr; }
+    const_iterator end() const { return nullptr; }
+};
+
+TEST_CASE( "parseEnums", "[Strings][enums]" ) {
+    using namespace Catch::Matchers;
+    using Catch::Detail::parseEnums;
+
+    SECTION( "No enums" )
+        CHECK_THAT( parseEnums( "" ), Equals( std::vector<Catch::StringRef>{} ) );
+
+    SECTION( "One enum value" ) {
+        CHECK_THAT( parseEnums( "ClassName::EnumName::Value1" ),
+                Equals(std::vector<Catch::StringRef>{"Value1"} ) );
+        CHECK_THAT( parseEnums( "Value1" ),
+                Equals( std::vector<Catch::StringRef>{"Value1"} ) );
+        CHECK_THAT( parseEnums( "EnumName::Value1" ),
+                Equals(std::vector<Catch::StringRef>{"Value1"} ) );
+    }
+
+    SECTION( "Multiple enum values" ) {
+        CHECK_THAT( parseEnums( "ClassName::EnumName::Value1, ClassName::EnumName::Value2" ),
+                    Equals( std::vector<Catch::StringRef>{"Value1", "Value2"} ) );
+        CHECK_THAT( parseEnums( "ClassName::EnumName::Value1, ClassName::EnumName::Value2, ClassName::EnumName::Value3" ),
+                    Equals( std::vector<Catch::StringRef>{"Value1", "Value2", "Value3"} ) );
+        CHECK_THAT( parseEnums( "ClassName::EnumName::Value1,ClassName::EnumName::Value2 , ClassName::EnumName::Value3" ),
+                    Equals( std::vector<Catch::StringRef>{"Value1", "Value2", "Value3"} ) );
+    }
+}
+
+TEST_CASE( "Directly creating an EnumInfo" ) {
+
+    using namespace Catch::Detail;
+    auto enumInfo = makeEnumInfo( "EnumName", "EnumName::Value1, EnumName::Value2", {0, 1} );
+
+    CHECK( enumInfo->lookup(0) == "Value1" );
+    CHECK( enumInfo->lookup(1) == "Value2" );
+    CHECK( enumInfo->lookup(3) == "{** unexpected enum value **}" );
+}
+
+TEST_CASE("Range type with sentinel") {
+    CHECK( Catch::Detail::stringify(UsesSentinel{}) == "{  }" );
+}
+
+TEST_CASE("convertIntoString stringification helper", "[toString][approvals]") {
+    using namespace std::string_literals;
+    using Catch::Detail::convertIntoString;
+    using namespace Catch;
+
+    SECTION("No escaping") {
+        CHECK(convertIntoString(""_sr, false) == R"("")"s);
+        CHECK(convertIntoString("abcd"_sr, false) == R"("abcd")"s);
+        CHECK(convertIntoString("ab\ncd"_sr, false) == "\"ab\ncd\""s);
+        CHECK(convertIntoString("ab\r\ncd"_sr, false) == "\"ab\r\ncd\""s);
+        CHECK(convertIntoString("ab\"cd"_sr, false) == R"("ab"cd")"s);
+    }
+    SECTION("Escaping invisibles") {
+        CHECK(convertIntoString(""_sr, true) == R"("")"s);
+        CHECK(convertIntoString("ab\ncd"_sr, true) == R"("ab\ncd")"s);
+        CHECK(convertIntoString("ab\r\ncd"_sr, true) == R"("ab\r\ncd")"s);
+        CHECK(convertIntoString("ab\tcd"_sr, true) == R"("ab\tcd")"s);
+        CHECK(convertIntoString("ab\fcd"_sr, true) == R"("ab\fcd")"s);
+        CHECK(convertIntoString("ab\"cd"_sr, true) == R"("ab"cd")"s);
+    }
+}
+
+TEMPLATE_TEST_CASE( "Stringifying char arrays with statically known sizes",
+                    "[toString]",
+                    char,
+                    signed char,
+                    unsigned char ) {
+    using namespace std::string_literals;
+    TestType with_null_terminator[10] = "abc";
+    CHECK( ::Catch::Detail::stringify( with_null_terminator ) == R"("abc")"s );
+
+    TestType no_null_terminator[3] = { 'a', 'b', 'c' };
+    CHECK( ::Catch::Detail::stringify( no_null_terminator ) == R"("abc")"s );
+}
+
+TEST_CASE( "#2944 - Stringifying dates before 1970 should not crash", "[.approvals]" ) {
+    using Catch::Matchers::Equals;
+    using Days = std::chrono::duration<int32_t, std::ratio<86400>>;
+    using SysDays = std::chrono::time_point<std::chrono::system_clock, Days>;
+    Catch::StringMaker<std::chrono::system_clock::time_point> sm;
+
+    // Check simple date first
+    const SysDays post1970{ Days{ 1 } };
+    auto converted_post = sm.convert( post1970 );
+    REQUIRE( converted_post == "1970-01-02T00:00:00Z" );
+
+    const SysDays pre1970{ Days{ -1 } };
+    auto converted_pre = sm.convert( pre1970 );
+    REQUIRE_THAT(
+        converted_pre,
+        Equals( "1969-12-31T00:00:00Z" ) ||
+            Equals( "gmtime from provided timepoint has failed. This "
+                    "happens e.g. with pre-1970 dates using Microsoft libc" ) );
+}