Add ability to get enum values from int.

.gitignore

@@ -7,6 +7,7 @@ results
 BenchmarkDotNet.Artifacts
 
 *.sln.DotSettings.user
+*.received.*
 /AttributesExtractor.Benchmark/BenchmarkDotNet.Artifacts/
 
 **/.DS_Store

src/Apparatus.AOT.Reflection.Core/EnumHelper.cs

@@ -20,6 +20,57 @@ public static IEnumerable<IEnumValueInfo<TEnum>> GetEnumInfo<TEnum>()
             return data.Value.Values;
         }
 
+        public static bool IsDefined<TEnum>(TEnum value)
+            where TEnum : Enum
+        {
+            var data = EnumMetadataStore<TEnum>.Data;
+            if (data is null)
+            {
+                throw new InvalidOperationException(
+                    $"Type '{typeof(TEnum).FullName}' is not registered. Use 'Apparatus.AOT.Reflection.GenericHelper.Bootstrap' to bootstrap it.");
+            }
+
+            return data.Value.ContainsKey(value);
+        }
+
+        public static string GetName<TEnum>(TEnum value)
+            where TEnum : Enum
+        {
+            var data = EnumMetadataStore<TEnum>.Data;
+            if (data is null)
+            {
+                throw new InvalidOperationException(
+                    $"Type '{typeof(TEnum).FullName}' is not registered. Use 'Apparatus.AOT.Reflection.GenericHelper.Bootstrap' to bootstrap it.");
+            }
+
+            return data.Value[value].Name;
+        }
+
+        public static IEnumValueInfo<TEnum> CreateOrDefault<TEnum>(int value, TEnum @default)
+            where TEnum : Enum
+        {
+            var enumValue = FromInt<TEnum>(value);
+            return CreateOrDefault(enumValue, @default);
+        }
+
+        public static IEnumValueInfo<TEnum> CreateOrDefault<TEnum>(TEnum value, TEnum @default)
+            where TEnum : Enum
+        {
+            var data = EnumMetadataStore<TEnum>.Data;
+            if (data is null)
+            {
+                throw new InvalidOperationException(
+                    $"Type '{typeof(TEnum).FullName}' is not registered. Use 'Apparatus.AOT.Reflection.GenericHelper.Bootstrap' to bootstrap it.");
+            }
+
+            if (IsDefined(value))
+            {
+                return data.Value[value];
+            }
+
+            return data.Value[@default];
+        }
+
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static TEnum FromInt<TEnum>(int value)
             where TEnum : Enum

src/Apparatus.AOT.Reflection.Core/EnumValueInfo.cs

@@ -4,18 +4,6 @@
 
 namespace Apparatus.AOT.Reflection
 {
-    public interface IEnumValueInfo<TEnum>
-        where TEnum : Enum
-    {
-        string Name { get; }
-
-        Attribute[] Attributes { get; }
-
-        int RawValue { get; }
-
-        TEnum Value { get; }
-    }
-
     public class EnumValueInfo<TEnum> : IEnumValueInfo<TEnum>, IEquatable<EnumValueInfo<TEnum>>
         where TEnum : Enum
     {

src/Apparatus.AOT.Reflection.Core/IEnumValueInfo.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace Apparatus.AOT.Reflection
+{
+    public interface IEnumValueInfo<TEnum>
+        where TEnum : Enum
+    {
+        string Name { get; }
+
+        Attribute[] Attributes { get; }
+
+        int RawValue { get; }
+
+        TEnum Value { get; }
+    }
+}

src/Apparatus.AOT.Reflection.Tests/AOTReflectionEnumsTests.CreateEnumFromIntWorks.verified.txt

@@ -0,0 +1,11 @@
+{
+  Name: Admin,
+  RawValue: 1,
+  Value: Admin,
+  Attributes: [
+    {
+      Description: Admin user,
+      TypeId: DescriptionAttribute
+    }
+  ]
+}

src/Apparatus.AOT.Reflection.Tests/AOTReflectionEnumsTests.cs

@@ -14,6 +14,15 @@ public async Task GetEnumValueInfoWorks()
 
         await Verify(result);
     }
+
+    [Fact]
+    public async Task CreateEnumFromIntWorks()
+    {
+        var project = TestProject.Project;
+        var result = await project.ExecuteTest("return EnumHelper.CreateOrDefault(1, UserKind.User);");
+
+        await Verify(result);
+    }
 
     [Fact]
     public async Task GetEnumValueInfoWorksWithAttributes()