Use TestConsole in all tests

Author: natemcmaster

test/CommandLineUtils.Tests/AttributeValidatorTests.cs

@@ -73,7 +73,7 @@ private void OnExecute() { }
         [InlineData("[email protected]", 0)]
         public void ValidatesEmailArgument(string email, int exitCode)
         {
-            Assert.Equal(exitCode, CommandLineApplication.Execute<EmailArgumentApp>(email));
+            Assert.Equal(exitCode, CommandLineApplication.Execute<EmailArgumentApp>(new TestConsole(_output), email));
         }
 
         private class OptionBuilderApp : CommandLineApplication

test/CommandLineUtils.Tests/CommandLineApplicationOfTTests.cs

@@ -2,11 +2,19 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Xunit;
+using Xunit.Abstractions;
 
 namespace McMaster.Extensions.CommandLineUtils.Tests
 {
     public class CommandLineApplicationOfTTests
     {
+        private readonly ITestOutputHelper _output;
+
+        public CommandLineApplicationOfTTests(ITestOutputHelper output)
+        {
+            _output = output;
+        }
+
         private class AttributesNotUsedClass
         {
             public int OptionA { get; set; }
@@ -60,7 +68,7 @@ public void InitializesTypeWithAttributes()
         public void ThrowsForArgumentsWithoutMatchingAttribute()
         {
             var ex = Assert.Throws<CommandParsingException>(
-                () => CommandLineParser.ParseArgs<SimpleProgram>("-f"));
+                () => CommandLineParser.ParseArgs<SimpleProgram>(_output, "-f"));
             Assert.StartsWith("Unrecognized option '-f'", ex.Message);
         }
     }

test/CommandLineUtils.Tests/Utilities/CommandLineParser.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System.IO;
+using McMaster.Extensions.CommandLineUtils.Tests;
+using Xunit.Abstractions;
 
 namespace McMaster.Extensions.CommandLineUtils
 {
@@ -12,8 +14,14 @@ internal static class CommandLineParser
     {
         public static T ParseArgs<T>(params string[] args)
             where T : class
+            => ParseArgsImpl<T>(NullConsole.Singleton, args);
+
+        public static T ParseArgs<T>(ITestOutputHelper output, params string[] args)
+            where T : class => ParseArgsImpl<T>(new TestConsole(output), args);
+
+        private static T ParseArgsImpl<T>(IConsole console, string[] args) where T : class
         {
-            var app = new CommandLineApplication<T>(NullConsole.Singleton, Directory.GetCurrentDirectory(), true);
+            var app = new CommandLineApplication<T>(console, Directory.GetCurrentDirectory(), true);
             app.Conventions.UseDefaultConventions();
             app.Parse(args);
             return app.Model;