slight test refactor to make them more robust

Author: siywilliams

FluentCommandLineParser.Tests/FluentCommandLineParserTests.cs

@@ -932,37 +932,37 @@ public void Ensure_Additional_Arguments_Callback_Not_Called_When_No_Additional_A
 		{
 			var parser = CreateFluentParser();
 
-			var capturedAdditionalArgs = new List<string>();
+			bool wasCalled = false;
 
 			parser.Setup<string>("my-option")
-				  .CaptureAdditionalArguments(capturedAdditionalArgs.AddRange);
+				  .CaptureAdditionalArguments(addArgs => wasCalled = true);
 
 			var result = parser.Parse(new[] { "--my-option", "value" });
 
 			Assert.IsFalse(result.HasErrors);
 			Assert.IsFalse(result.EmptyArgs);
 			Assert.IsFalse(result.HelpCalled);
 
-			Assert.IsEmpty(capturedAdditionalArgs);
+			Assert.IsFalse(wasCalled);
 		}
 
 		[Test]
 		public void Ensure_Additional_Arguments_Callback_Not_Called_When_No_Additional_Args_Follow_A_Double_Dash()
 		{
 			var parser = CreateFluentParser();
 
-			var capturedAdditionalArgs = new List<string>();
+			bool wasCalled = false;
 
 			parser.Setup<string>("my-option")
-				  .CaptureAdditionalArguments(capturedAdditionalArgs.AddRange);
+				  .CaptureAdditionalArguments(addArgs => wasCalled = true);
 
 			var result = parser.Parse(new[] { "--my-option", "value", "--" });
 
 			Assert.IsFalse(result.HasErrors);
 			Assert.IsFalse(result.EmptyArgs);
 			Assert.IsFalse(result.HelpCalled);
 
-			Assert.IsEmpty(capturedAdditionalArgs);
+			Assert.IsFalse(wasCalled);
 		}
 
 		[Test]
@@ -1011,7 +1011,7 @@ public void Ensure_Additional_Args_Can_Be_Captured_For_Different_Options()
 			Assert.IsTrue(option1AddArgs.Contains("addArg1"));
 			Assert.IsTrue(option1AddArgs.Contains("addArg2"));
 
-			Assert.AreEqual(2, option1AddArgs.Count());
+			Assert.AreEqual(2, option2AddArgs.Count());
 			Assert.IsTrue(option2AddArgs.Contains("addArg3"));
 			Assert.IsTrue(option2AddArgs.Contains("addArg4"));
 		}