Some cleanup and tests for Enum and constexpr strings.

Enum.test/0.cc

@@ -0,0 +1,61 @@
+static_assert( __cplusplus > 2020'99 );
+
+#include "../Enum.h"
+
+#include <Alepha/Testing/test.h>
+#include <Alepha/Testing/TableTest.h>
+
+#include <Alepha/Utility/evaluation_helpers.h>
+
+#include <Alepha/IOStreams/String.h>
+
+static auto init= Alepha::Utility::enroll <=[]
+{
+	using namespace Alepha::literals::enum_literals;
+	using namespace Alepha::Testing::literals;
+
+	using namespace Alepha::Testing::exports;
+
+	using MyEnum= Alepha::Enum< "Adam"_value, "Baker"_value, "Charlie"_value, "David"_value >;
+
+	"Enum round trip printing test"_test <= TableTest
+	<
+		[]( const std::string s ) -> std::string
+		{
+			MyEnum e;
+			std::istringstream iss{ s };
+
+			( iss >> e );
+			return Alepha::IOStreams::String{} << e;
+		}
+	>
+	::Cases
+	{
+		{ "Adam", { "Adam" }, "Adam" },
+		{ "Charlie", { "Charlie" }, "Charlie" },
+		{ "Wrong", { "Wrong" }, std::type_identity< Alepha::EnumTextMismatchError >{} },
+	};
+
+	"Enum failure parse"_test <= TableTest
+	<
+		[]( const std::string s )
+		{
+			try
+			{
+				MyEnum e;
+				std::istringstream iss{ s };
+
+				( iss >> e );
+				throw "Fail";
+			}
+			catch( const Alepha::EnumTextMismatchError &ex )
+			{
+				return ex.expectedValues();
+			}
+		}
+	>
+	::Cases
+	{
+		{ "Wrong", { "Wrong" }, { "Adam", "Baker", "Charlie", "David" } },
+	};
+};

Enum.test/CMakeLists.txt

@@ -0,0 +1 @@
+unit_test( 0 )