import catch2 3.8.1vendor/catch2/3.8.1vendor/catch2

1 files changed, 108 insertions, 0 deletions

diff --git a/tests/SelfTest/UsageTests/EnumToString.tests.cpp b/tests/SelfTest/UsageTests/EnumToString.tests.cpp
new file mode 100644
index 0000000..268a7ca
--- /dev/null
+++ b/tests/SelfTest/UsageTests/EnumToString.tests.cpp
@@ -0,0 +1,108 @@
+
+//              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/catch_test_macros.hpp>
+#include <catch2/internal/catch_enum_values_registry.hpp>
+
+
+namespace {
+// Enum without user-provided stream operator
+enum Enum1 { Enum1Value0, Enum1Value1 };
+
+// Enum with user-provided stream operator
+enum Enum2 { Enum2Value0, Enum2Value1 };
+
+std::ostream& operator<<( std::ostream& os, Enum2 v ) {
+    return os << "E2{" << static_cast<int>(v) << "}";
+}
+} // end anonymous namespace
+
+TEST_CASE( "toString(enum)", "[toString][enum]" ) {
+    Enum1 e0 = Enum1Value0;
+    CHECK( ::Catch::Detail::stringify(e0) == "0" );
+    Enum1 e1 = Enum1Value1;
+    CHECK( ::Catch::Detail::stringify(e1) == "1" );
+}
+
+TEST_CASE( "toString(enum w/operator<<)", "[toString][enum]" ) {
+    Enum2 e0 = Enum2Value0;
+    CHECK( ::Catch::Detail::stringify(e0) == "E2{0}" );
+    Enum2 e1 = Enum2Value1;
+    CHECK( ::Catch::Detail::stringify(e1) == "E2{1}" );
+}
+
+// Enum class without user-provided stream operator
+namespace {
+enum class EnumClass1 { EnumClass1Value0, EnumClass1Value1 };
+
+// Enum class with user-provided stream operator
+enum class EnumClass2 { EnumClass2Value0, EnumClass2Value1 };
+
+std::ostream& operator<<( std::ostream& os, EnumClass2 e2 ) {
+    switch( static_cast<int>( e2 ) ) {
+        case static_cast<int>( EnumClass2::EnumClass2Value0 ):
+            return os << "E2/V0";
+        case static_cast<int>( EnumClass2::EnumClass2Value1 ):
+            return os << "E2/V1";
+        default:
+            return os << "Unknown enum value " << static_cast<int>( e2 );
+    }
+}
+
+} // end anonymous namespace
+
+TEST_CASE( "toString(enum class)", "[toString][enum][enumClass]" ) {
+    EnumClass1 e0 = EnumClass1::EnumClass1Value0;
+    CHECK( ::Catch::Detail::stringify(e0) == "0" );
+    EnumClass1 e1 = EnumClass1::EnumClass1Value1;
+    CHECK( ::Catch::Detail::stringify(e1) == "1" );
+}
+
+
+TEST_CASE( "toString(enum class w/operator<<)", "[toString][enum][enumClass]" ) {
+    EnumClass2 e0 = EnumClass2::EnumClass2Value0;
+    CHECK( ::Catch::Detail::stringify(e0) == "E2/V0" );
+    EnumClass2 e1 = EnumClass2::EnumClass2Value1;
+    CHECK( ::Catch::Detail::stringify(e1) == "E2/V1" );
+
+    auto e3 = static_cast<EnumClass2>(10);
+    CHECK( ::Catch::Detail::stringify(e3) == "Unknown enum value 10" );
+}
+
+enum class EnumClass3 { Value1, Value2, Value3, Value4 };
+
+CATCH_REGISTER_ENUM( EnumClass3, EnumClass3::Value1, EnumClass3::Value2, EnumClass3::Value3 )
+
+
+TEST_CASE( "Enums can quickly have stringification enabled using CATCH_REGISTER_ENUM" ) {
+    using Catch::Detail::stringify;
+    REQUIRE( stringify( EnumClass3::Value1 ) == "Value1" );
+    REQUIRE( stringify( EnumClass3::Value2 ) == "Value2" );
+    REQUIRE( stringify( EnumClass3::Value3 ) == "Value3" );
+    REQUIRE( stringify( EnumClass3::Value4 ) == "{** unexpected enum value **}" );
+
+    EnumClass3 ec3 = EnumClass3::Value2;
+    REQUIRE( stringify( ec3 ) == "Value2" );
+}
+
+namespace Bikeshed {
+    enum class Colours { Red, Green, Blue };
+}
+
+// Important!: This macro must appear at top level scope - not inside a namespace
+// You can fully qualify the names, or use a using if you prefer
+CATCH_REGISTER_ENUM( Bikeshed::Colours,
+                     Bikeshed::Colours::Red,
+                     Bikeshed::Colours::Green,
+                     Bikeshed::Colours::Blue )
+
+TEST_CASE( "Enums in namespaces can quickly have stringification enabled using CATCH_REGISTER_ENUM" ) {
+    using Catch::Detail::stringify;
+    REQUIRE( stringify( Bikeshed::Colours::Red ) == "Red" );
+    REQUIRE( stringify( Bikeshed::Colours::Blue ) == "Blue" );
+}