filter intecerceptor testing.

PoweredSoft.DynamicQuery.Test/FilterInterceptorTests.cs

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+using PoweredSoft.DynamicQuery.Core;
+using PoweredSoft.DynamicQuery.Test.Mock;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Xunit;
+
+namespace PoweredSoft.DynamicQuery.Test
+{
+    public class FilterInterceptorTests
+    {
+        private class MockFilterInterceptorA : IFilterInterceptor
+        {
+            public IFilter InterceptFilter(IFilter filter)
+            {
+                if (filter is ISimpleFilter && ((ISimpleFilter)filter).Path == "CustomerFirstName")
+                    return new SimpleFilter { Path = "Customer.FirstName", Type = FilterType.Contains, Value = "David" };
+
+                return filter;
+            }
+        }
+
+        private class MockFilterInterceptorB : IFilterInterceptor
+        {
+            public IFilter InterceptFilter(IFilter filter)
+            {
+                return new SimpleFilter { Path = "Customer.LastName", Type = FilterType.Contains, Value = "Lebee" };
+            }
+        }
+
+        [Fact]
+        public void Simple()
+        {
+            MockContextFactory.SeedAndTestContextFor("FilterInterceptorTests_Simple", TestSeeders.SimpleSeedScenario, ctx =>
+            {
+                var queryable = ctx.Orders.AsQueryable();
+                
+                var criteria = new QueryCriteria()
+                {
+                    Filters = new List<IFilter>
+                    {
+                        new SimpleFilter { Path = "CustomerFirstName", Value = "David", Type = FilterType.Contains }
+                    }
+                };
+
+                var query = new QueryHandler();
+                query.AddInterceptor(new MockFilterInterceptorA());
+                var result = query.Execute(queryable, criteria);
+
+                var actual = result.Data;
+                var expected = queryable.Where(t => t.Customer.FirstName == "David").ToList();
+                Assert.Equal(expected, actual);
+            });
+        }
+    }
+}