Merge pull request #510 from bilal-fazlani/fix-509-unrecognized-option

fix #509 return `Unrecognized option` instead of throwing ex

Author: drewburlingame

CommandDotNet.Tests/FeatureTests/ParseTests/BasicParseTests.cs

@@ -1,5 +1,6 @@
 using CommandDotNet.Tests.Utils;
 using CommandDotNet.TestTools.Scenarios;
+using JetBrains.Annotations;
 using Xunit;
 using Xunit.Abstractions;
 
@@ -102,6 +103,20 @@ public void ErrorWhenExtraValueProvidedForOption()
         });
     }
 
+    [Fact]
+    public void ErrorWhenOperandCalledAsOption()
+    {
+        new AppRunner<App>().Verify(new Scenario
+        {
+            When = {Args = "Add -x 2 -y 3"},
+            Then =
+            {
+                ExitCode = 1,
+                OutputContainsTexts = {"Unrecognized option '-x'"}
+            }
+        });
+    }
+
     [Fact]
     public void NegativeNumbersCanBeUsedForArgumentValues()
     {
@@ -154,6 +169,7 @@ public void EmptyStringCanBeUsedForOperandValues()
         });
     }
 
+    [UsedImplicitly]
     private class App
     {
         public void Add(int x, int y, 

CommandDotNet/Command.cs

@@ -120,8 +120,8 @@ public Command? Parent
         _argumentsByAlias.GetValueOrDefault(alias ?? throw new ArgumentNullException(nameof(alias)));
 
     public TArgumentNode? Find<TArgumentNode>(string alias)
-        where TArgumentNode : class, IArgumentNode => 
-        (TArgumentNode?) FindArgumentNode(alias);
+        where TArgumentNode : class, IArgumentNode =>
+        FindArgumentNode(alias) as TArgumentNode;
 
     internal void AddArgumentNode(IArgumentNode argumentNode)
     {

docs/ReleaseNotes/CommandDotNet.md

@@ -1,5 +1,9 @@
 # CommandDotNet
 
+## 8.0.1
+
+* [#509](https://github.com/bilal-fazlani/commanddotnet/issues/509) calling operand as option returns `Unrecognized option '-x'` instead of throwing exception.  Thanks to [lxy-iUnknown](https://github.com/lxy-iUnknown) for reporting this.
+
 ## 8.0.0
 
 * add support for net9