Merge pull request #6 from IharYakimush/Issue5

InvalidOperationException: The entity does not have a key defined

Author: IharYakimush

Community.Data.OData.Linq.xTests/ODataTests.cs

@@ -0,0 +1,29 @@
+namespace Community.OData.Linq.xTests
+{
+    using System;
+    using System.Linq;
+
+    using Community.OData.Linq.xTests.SampleData;
+
+    using Microsoft.OData;
+
+    using Xunit;
+
+    public class ODataTests
+    {
+        [Fact]
+        public void CustomKey()
+        {
+            var result = SampleWithCustomKey.CreateQuery().OData().Filter("Name eq 'n1'").ToArray();
+
+            Assert.Single(result);
+            Assert.Equal("n1", result[0].Name);
+        }
+
+        [Fact]
+        public void WithoutKeyThrowException()
+        {
+            Assert.Throws<InvalidOperationException>(() => SampleWithoutKey.CreateQuery().OData());
+        }
+    }
+}

Community.Data.OData.Linq.xTests/SampleData/SampleWithCustomKey.cs

@@ -0,0 +1,25 @@
+namespace Community.OData.Linq.xTests.SampleData
+{
+    using System;
+    using System.ComponentModel.DataAnnotations;
+    using System.Linq;
+
+    public class SampleWithCustomKey
+    {
+        private static readonly SampleWithCustomKey[] items =
+            {
+                new SampleWithCustomKey { Name = "n1", DateTime = new DateTime(2018, 1, 26)},
+                new SampleWithCustomKey { Name = "n2", DateTime = new DateTime(2001, 1, 26)}
+            };
+
+        public static IQueryable<SampleWithCustomKey> CreateQuery()
+        {
+            return items.AsQueryable();
+        }
+
+        [Key]
+        public string Name { get; set; }
+
+        public DateTime DateTime { get; set; }
+    }
+}

Community.Data.OData.Linq.xTests/SampleData/SampleWithoutKey.cs

@@ -0,0 +1,23 @@
+namespace Community.OData.Linq.xTests.SampleData
+{
+    using System;
+    using System.Linq;
+
+    public class SampleWithoutKey
+    {
+        private static readonly SampleWithoutKey[] items =
+            {
+                new SampleWithoutKey { Name = "n1", DateTime = new DateTime(2018, 1, 26)},
+                new SampleWithoutKey { Name = "n2", DateTime = new DateTime(2001, 1, 26)}
+            };
+
+        public static IQueryable<SampleWithoutKey> CreateQuery()
+        {
+            return items.AsQueryable();
+        }
+
+        public string Name { get; set; }
+
+        public DateTime DateTime { get; set; }
+    }
+}