Additional null checks in BunitHtmlParser, better naming of BlazorDiffingHelpers

Author: egil

src/bunit.web/Diffing/BlazorDiffingHelpers.cs

@@ -3,14 +3,14 @@
 namespace Bunit.Diffing
 {
 	/// <summary>
-	/// Blazor Dffing Helpers
+	/// Blazor Diffing Helpers
 	/// </summary>
 	public static class BlazorDiffingHelpers
 	{
 		/// <summary>
 		/// Represents a diffing filter that removes all special Blazor attributes added by the /<see cref="Htmlizer"/>.
 		/// </summary>
-		public static FilterDecision BlazorEventHandlerIdAttrFilter(in AttributeComparisonSource attrSource, FilterDecision currentDecision)
+		public static FilterDecision BlazorAttributeFilter(in AttributeComparisonSource attrSource, FilterDecision currentDecision)
 		{
 			if (currentDecision == FilterDecision.Exclude)
 				return currentDecision;
@@ -19,7 +19,6 @@ public static FilterDecision BlazorEventHandlerIdAttrFilter(in AttributeComparis
 				return FilterDecision.Exclude;
 
 			return currentDecision;
-		}
+		}		
 	}
-
 }

src/bunit.web/Diffing/HtmlComparer.cs

@@ -22,7 +22,7 @@ public HtmlComparer()
 		{
 			var strategy = new DiffingStrategyPipeline();
 			strategy.AddDefaultOptions();
-			strategy.AddFilter(BlazorDiffingHelpers.BlazorEventHandlerIdAttrFilter, StrategyType.Specialized);
+			strategy.AddFilter(BlazorDiffingHelpers.BlazorAttributeFilter, StrategyType.Specialized);
 			_differenceEngine = new HtmlDiffer(strategy);
 		}
 

src/bunit.web/Rendering/BunitHtmlParser.cs

@@ -37,7 +37,9 @@ public BunitHtmlParser() : this(Configuration.Default.WithCss().With(new HtmlCom
 		/// with the <paramref name="testRenderer"/> registered.
 		/// </summary>
 		public BunitHtmlParser(ITestRenderer testRenderer, HtmlComparer htmlComparer)
-			: this(Configuration.Default.WithCss().With(testRenderer).With(htmlComparer)) { }
+			: this(Configuration.Default.WithCss()
+				  .With(testRenderer ?? throw new ArgumentNullException(nameof(testRenderer)))
+				  .With(htmlComparer ?? throw new ArgumentNullException(nameof(htmlComparer)))) { }
 
 		private BunitHtmlParser(IConfiguration angleSharpConfiguration)
 		{