feat: general improvements and minor bugs

Author: ReneSchwarzer

src/WebExpress.WebIndex.Test/WQL/UnitTestWqlWordSearchA.cs

@@ -238,7 +238,9 @@ public void AbstracrSyntaxTree()
         [InlineData("text ~ \"Helena\"", true, 3, WqlExpressionType.Parameter, WqlExpressionType.LogicalOperator)]
         [InlineData("text ~ day(", false, 3, WqlExpressionType.Parameter, WqlExpressionType.LogicalOperator)]
         [InlineData("text ~ day()", true, 3, WqlExpressionType.Parameter, WqlExpressionType.LogicalOperator)]
+        //[InlineData("text ~ day(\"param1\")", true, 3, WqlExpressionType.Parameter, WqlExpressionType.LogicalOperator)]
         [InlineData("text ~ Helena and", false, 4, WqlExpressionType.LogicalOperator, WqlExpressionType.Attribute)]
+        //[InlineData("text in ('Helena', 'Hans')", true, 2, WqlExpressionType.Operator, WqlExpressionType.Parameter)]
         public void Analyze(string wql, bool valid, int count, WqlExpressionType type, params WqlExpressionType[] expectedNextTokens)
         {
             // arrange

src/WebExpress.WebIndex/Wql/WqlParser.cs

@@ -87,7 +87,7 @@ public partial class WqlParser<TIndexItem> : IWqlParser<TIndexItem>
         /// <summary>
         /// Initializes a new instance of the parser and registers default conditions and functions.
         /// </summary>
-        internal WqlParser()
+        public WqlParser()
         {
             Attributes = GetFieldData(typeof(TIndexItem));