allow '<' & '>' to be used in strings

Sieve/Models/FilterTerm.cs

@@ -22,19 +22,20 @@ public string Filter
         {
             set
             {
-                var filterSplits = Regex.Split(value, EscapeNegPatternForOper).Select(t => t.Trim()).ToArray();
+                var filterSplits = Regex.Split(value, EscapeNegPatternForOper);
 
-                Names = Regex.Split(filterSplits[0], EscapedPipePattern).Select(t => t.Trim()).ToArray();
+                Names = Regex.Split(filterSplits[0].Trim(), EscapedPipePattern).Select(t => t.Trim()).ToArray();
 
                 if (filterSplits.Length > 2)
                 {
-                    foreach (var match in Regex.Matches(filterSplits[2], EscapePosPatternForOper))
+                    var filterValue = string.Join("", filterSplits.Skip(2)).Trim();
+                    foreach (var match in Regex.Matches(filterValue, EscapePosPatternForOper))
                     {
                         var matchStr = match.ToString();
-                        filterSplits[2] = filterSplits[2].Replace('\\' + matchStr, matchStr);
+                        filterValue = filterValue.Replace('\\' + matchStr, matchStr);
                     }
 
-                    Values = Regex.Split(filterSplits[2], EscapedPipePattern)
+                    Values = Regex.Split(filterValue, EscapedPipePattern)
                         .Select(UnEscape)
                         .ToArray();
                 }

SieveUnitTests/GeneralSpecialChars.cs

@@ -0,0 +1,334 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Sieve.Exceptions;
+using Sieve.Models;
+using Sieve.Services;
+using SieveUnitTests.Entities;
+using SieveUnitTests.Services;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace SieveUnitTests
+{
+    public class GeneralSpecialChars
+    {
+        private readonly ITestOutputHelper _testOutputHelper;
+        private readonly SieveProcessor _processor;
+        private readonly SieveProcessor _nullableProcessor;
+        private readonly IQueryable<Post> _posts;
+        private readonly IQueryable<Comment> _comments;
+
+        public GeneralSpecialChars(ITestOutputHelper testOutputHelper)
+        {
+            var nullableAccessor = new SieveOptionsAccessor();
+            nullableAccessor.Value.IgnoreNullsOnNotEqual = false;
+
+            _testOutputHelper = testOutputHelper;
+            _processor = new ApplicationSieveProcessor(new SieveOptionsAccessor(),
+                new SieveCustomSortMethods(),
+                new SieveCustomFilterMethods());
+
+            _nullableProcessor = new ApplicationSieveProcessor(nullableAccessor,
+                new SieveCustomSortMethods(),
+                new SieveCustomFilterMethods());
+
+            _posts = new List<Post>
+            {
+                new Post
+                {
+                    Id = 0,
+                    Title = "A<>1",
+                    LikeCount = 100,
+                    IsDraft = true,
+                    CategoryId = null,
+                    TopComment = new Comment { Id = 0, Text = "A1" },
+                    FeaturedComment = new Comment { Id = 4, Text = "A2" }
+                },
+                new Post
+                {
+                    Id = 1,
+                    Title = "B>2",
+                    LikeCount = 50,
+                    IsDraft = false,
+                    CategoryId = 1,
+                    TopComment = new Comment { Id = 3, Text = "B1" },
+                    FeaturedComment = new Comment { Id = 5, Text = "B2" }
+                },
+                new Post
+                {
+                    Id = 2,
+                    Title = "C==E",
+                    LikeCount = 0,
+                    CategoryId = 1,
+                    TopComment = new Comment { Id = 2, Text = "C1" },
+                    FeaturedComment = new Comment { Id = 6, Text = "C2" }
+                },
+                new Post
+                {
+                    Id = 3,
+                    Title = "D@=k",
+                    LikeCount = 3,
+                    IsDraft = true,
+                    CategoryId = 2,
+                    TopComment = new Comment { Id = 1, Text = "D1" },
+                    FeaturedComment = new Comment { Id = 7, Text = "D2" }
+                },
+                new Post
+                {
+                    Id = 4,
+                    Title = "Yen!=Yin",
+                    LikeCount = 5,
+                    IsDraft = true,
+                    CategoryId = 5,
+                    TopComment = new Comment { Id = 4, Text = "Yen3" },
+                    FeaturedComment = new Comment { Id = 8, Text = "Yen4" }
+                }
+            }.AsQueryable();
+
+            _comments = new List<Comment>
+            {
+                new Comment
+                {
+                    Id = 0,
+                    DateCreated = DateTimeOffset.UtcNow.AddDays(-20),
+                    Text = "This is an old comment."
+                },
+                new Comment
+                {
+                    Id = 1,
+                    DateCreated = DateTimeOffset.UtcNow.AddDays(-1),
+                    Text = "This is a fairly new comment."
+                },
+                new Comment
+                {
+                    Id = 2,
+                    DateCreated = DateTimeOffset.UtcNow,
+                    Text = "This is a brand new comment. (Text in braces, comma separated)"
+                },
+            }.AsQueryable();
+        }
+
+        [Fact]
+        public void ContainsCanBeCaseInsensitive()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title@=*a<"
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.Equal(0, result.First().Id);
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void NotEqualsCanBeCaseInsensitive()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title!=*a<>1"
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.Equal(1, result.First().Id);
+            Assert.True(result.Count() == 4);
+        }
+
+        [Fact]
+        public void EndsWithWorks()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title_-=n"
+            };
+
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].Values.ToString());
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].Operator);
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].OperatorParsed.ToString());
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.Equal(4, result.First().Id);
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void EndsWithCanBeCaseInsensitive()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title_-=*N"
+            };
+
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].Values.ToString());
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].Operator);
+            _testOutputHelper.WriteLine(model.GetFiltersParsed()[0].OperatorParsed.ToString());
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.Equal(4, result.First().Id);
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void ContainsIsCaseSensitive()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title@=a",
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.True(!result.Any());
+        }
+
+        [Fact]
+        public void NotContainsWorks()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title!@=D",
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.True(result.Count() == 4);
+        }
+
+        [Theory]
+        [InlineData(@"Text@=*\,")]
+        [InlineData(@"Text@=*\, ")]
+        [InlineData(@"Text@=*braces\,")]
+        [InlineData(@"Text@=*braces\, comma")]
+        public void CanFilterWithEscapedComma(string filter)
+        {
+            var model = new SieveModel
+            {
+                Filters = filter
+            };
+
+            var result = _processor.Apply(model, _comments);
+
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void CustomFiltersWithOperatorsWork()
+        {
+            var model = new SieveModel
+            {
+                Filters = "HasInTitle==A",
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.True(result.Any(p => p.Id == 0));
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void CustomFiltersMixedWithUsualWork1()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Isnew,CategoryId==2",
+            };
+
+            var result = _processor.Apply(model, _posts);
+
+            Assert.True(result.Any(p => p.Id == 3));
+            Assert.True(result.Count() == 1);
+        }
+
+        [Fact]
+        public void CombinedAndOrWithSpaceFilteringWorks()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title==D@=k, (Title|LikeCount)==3",
+            };
+
+            var result = _processor.Apply(model, _posts);
+            var entry = result.FirstOrDefault();
+            var resultCount = result.Count();
+
+            Assert.NotNull(entry);
+            Assert.Equal(1, resultCount);
+            Assert.Equal(3, entry.Id);
+        }
+
+        [Fact]
+        public void OrValueFilteringWorks()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Title==C==E|D@=k",
+            };
+
+            var result = _processor.Apply(model, _posts);
+            Assert.Equal(2, result.Count());
+            Assert.True(result.Any(p => p.Id == 2));
+            Assert.True(result.Any(p => p.Id == 3));
+        }
+
+        [Fact]
+        public void OrValueFilteringWorks2()
+        {
+            var model = new SieveModel
+            {
+                Filters = "Text@=(|)",
+            };
+
+            var result = _processor.Apply(model, _comments);
+            Assert.Equal(1, result.Count());
+            Assert.Equal(2, result.FirstOrDefault()?.Id);
+        }
+
+        [Fact]
+        public void NestedFilteringWorks()
+        {
+            var model = new SieveModel
+            {
+                Filters = "TopComment.Text!@=A",
+            };
+
+            var result = _processor.Apply(model, _posts);
+            Assert.Equal(4, result.Count());
+            var posts = result.ToList();
+            Assert.Contains("B", posts[0].TopComment.Text);
+            Assert.Contains("C", posts[1].TopComment.Text);
+            Assert.Contains("D", posts[2].TopComment.Text);
+            Assert.Contains("Yen", posts[3].TopComment.Text);
+        }
+
+        [Fact]
+        public void FilteringNullsWorks()
+        {
+            var posts = new List<Post>
+            {
+                new Post
+                {
+                    Id = 1,
+                    Title = null,
+                    LikeCount = 0,
+                    IsDraft = false,
+                    CategoryId = null,
+                    TopComment = null,
+                    FeaturedComment = null
+                },
+            }.AsQueryable();
+
+            var model = new SieveModel
+            {
+                Filters = "FeaturedComment.Text!@=Some value",
+            };
+
+            var result = _processor.Apply(model, posts);
+            Assert.Equal(0, result.Count());
+        }
+    }
+}