Add enum handling

src/Utility.CommandLine.Arguments/Arguments.cs

@@ -457,6 +457,11 @@ private static object ChangeType(object value, string argument, Type toType)
         {
             try
             {
+                if (toType.IsEnum)
+                {
+                    return Enum.Parse(toType, (string)value, true);
+                }
+
                 return Convert.ChangeType(value, toType);
             }
             catch (Exception ex)

tests/Utility.CommandLine.Arguments.Tests/ArgumentsTests.cs

@@ -97,6 +97,22 @@ public void Constructor()
     [Collection("Arguments")]
     public class Arguments
     {
+        /// <summary>
+        ///     Enums
+        /// </summary>
+        public enum Enums
+        {
+            /// <summary>
+            ///     Foo 
+            /// </summary>
+            Foo = 1,
+
+            /// <summary>
+            ///     Bar
+            /// </summary>
+            Bar = 2,
+        }
+
         #region Private Properties
 
         /// <summary>
@@ -152,6 +168,12 @@ public class Arguments
         [CommandLine.Argument('C', "CASE-SENSITIVE")]
         private static string UpperCase { get; set; }
 
+        /// <summary>
+        ///     Gets or sets an enum property.
+        /// </summary>
+        [CommandLine.Argument('e', "enum")]
+        private static Enums Enum { get; set; }
+
         #endregion Private Properties
 
         #region Public Methods
@@ -164,7 +186,7 @@ public void GetArgumentHelp()
         {
             var help = CommandLine.Arguments.GetArgumentHelp(typeof(Arguments)).ToList();
 
-            Assert.Equal(6, help.Count);
+            Assert.Equal(7, help.Count);
             Assert.Single(help.Where(h => h.ShortName == 'b'));
             Assert.Equal("help", help.Where(h => h.ShortName == 'b').FirstOrDefault().HelpText);
         }
@@ -177,7 +199,7 @@ public void GetArgumentHelpNull()
         {
             var help = CommandLine.Arguments.GetArgumentHelp().ToList();
 
-            Assert.Equal(6, help.Count);
+            Assert.Equal(7, help.Count);
             Assert.Single(help.Where(h => h.ShortName == 'b'));
             Assert.Equal("help", help.Where(h => h.ShortName == 'b').FirstOrDefault().HelpText);
         }
@@ -568,6 +590,17 @@ public void PopulateDecimal()
             Assert.Equal(1.1M, Decimal);
         }
 
+        /// <summary>
+        ///     Tests the <see cref="CommandLine.Arguments.Populate(string, bool, string)"/> method with an enum value.
+        /// </summary>
+        [Fact]
+        public void PopulateEnum()
+        {
+            CommandLine.Arguments.Populate("--enum bar");
+
+            Assert.Equal(Enums.Bar, Enum);
+        }
+
         /// <summary>
         ///     Tests the <see cref="Utility.CommandLine.Arguments.Populate(string, bool, string)"/> method to assure that properties are not
         ///     "cleared" when clearing is explicitly disabled.