fix: remove duplicate TokenConverter definition, ref: NOISSUE

TextParser.Tests/TextParserTests.cs

@@ -33,6 +33,7 @@ public class TextParserTests
     private const string testInput10 = @"abc 
                                          bca 
                                          cab";
+    private const string testInput11 = @"2 x y 4 x y 6 x y 4 x y 1 x y";
 
     [Fact]
     public void LineParser_TestSimpleRepetition()
@@ -394,7 +395,7 @@ public class TextParserTests
     }
 
     [Fact]
-    public void TextPArser_TestReadingChars()
+    public void TextParser_TestReadingChars()
     {
         var schemaBuilder = new InputSchemaBuilder();
         var schema = schemaBuilder
@@ -415,4 +416,31 @@ public class TextParserTests
         Assert.Equal(3, row[1].Count);
         Assert.Equal(3, row[2].Count);
     }
+
+    [Fact]
+    public void TextParser_TestFilter()
+    {
+        var schemaBuilder = new InputSchemaBuilder();
+        var schema = schemaBuilder
+                        .Repeat()
+                            .Expect(InputType.Integer)
+                            .Expect(InputType.Char)
+                            .Expect(InputType.Char)
+                        .EndRepetition()
+                        .Build();
+
+        var parser = new TextParser<InputSchemaContext>(schema);
+        var numbers = parser
+                        .SetInputText(testInput11)
+                        .Parse()
+                        .Filter(InputType.Integer)
+                        .AsSingleStream<int>();
+
+        Assert.Equal(5, numbers.Count);
+        Assert.Equal(2, numbers[0]);
+        Assert.Equal(4, numbers[1]);
+        Assert.Equal(6, numbers[2]);
+        Assert.Equal(4, numbers[3]);
+        Assert.Equal(1, numbers[4]);
+    }
 }