Added static filters

SieveUnitTests/General.cs

@@ -847,6 +847,30 @@ namespace SieveUnitTests
             Assert.NotNull(entry);
             Assert.Equal(1, resultCount);
         }
-        
+
+        [Theory]
+        [InlineData(@"HasInTitleStatic@=Tale", 1)]
+        [InlineData(@"HasInTitleStatic@=Tail", 0)]
+        public void CanFilterWithStaticFilters(string filter, int expectedMatches)
+        {
+            var posts = new List<Post>
+            {
+                new()
+                {
+                    Id = 1,
+                    Title = "A Tale of Two Cities",
+                }
+            }.AsQueryable();
+
+            var model = new SieveModel
+            {
+                Filters = filter
+            };
+
+            var result = _processor.Apply(model, posts);
+            var resultCount = result.Count();
+            Assert.Equal(expectedMatches, resultCount);
+        }
+
     }
 }

SieveUnitTests/Services/SieveCustomFilterMethods.cs

@@ -54,6 +54,13 @@ namespace SieveUnitTests.Services
             return result;
         }
 
+        public static IQueryable<IPost> HasInTitleStatic(IQueryable<Post> source, string op, string[] values)
+        {
+            var result = source.Where(p => p.Title.Contains(values[0]));
+
+            return result;
+        }
+
         public IQueryable<IComment> IsNew(IQueryable<IComment> source, string op, string[] values)
         {
             var result = source.Where(c => c.DateCreated > DateTimeOffset.UtcNow.AddDays(-2));

SieveUnitTests/SieveUnitTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>