Allow $filtering with enum integer value in squote and without squote

src/Microsoft.OData.Core/UriParser/Binders/MetadataBindingUtils.cs

@@ -58,19 +58,30 @@ internal static SingleValueNode ConvertToTypeIfNeeded(SingleValueNode source, IE
                 }
 
                 ConstantNode constantNode = source as ConstantNode;
-                if (constantNode != null && constantNode.Value != null && source.TypeReference.IsString() && targetTypeReference.IsEnum())
+                // Check if the source node is a constant node, not null, and the source type is either string or integral
+                // and the target type is an enum.
+                if (constantNode != null && constantNode.Value != null && (source.TypeReference.IsString() || source.TypeReference.IsIntegral()) && targetTypeReference.IsEnum())
                 {
                     string memberName = constantNode.Value.ToString();
                     IEdmEnumType enumType = targetTypeReference.Definition as IEdmEnumType;
-                    if (enumType.Members.Any(m => string.Compare(m.Name, memberName, StringComparison.Ordinal) == 0))
+                    if(enumType.EnumMemberExists(memberName, StringComparison.Ordinal))
                     {
                         string literalText = ODataUriUtils.ConvertToUriLiteral(constantNode.Value, default(ODataVersion));
-                        return new ConstantNode(new ODataEnumValue(constantNode.Value.ToString(), targetTypeReference.Definition.ToString()), literalText, targetTypeReference);
+                        return new ConstantNode(new ODataEnumValue(memberName, enumType.ToString()), literalText, targetTypeReference);
                     }
-                    else
+
+                    // If the member name is an integral value, we should try to convert it to the enum member name.
+                    if (long.TryParse(memberName, out long memberIntegralValue))
                     {
-                        throw new ODataException(ODataErrorStrings.Binder_IsNotValidEnumConstant(memberName));
+                        // Find the enum member with the matching integral value
+                        if (enumType.TryParseEnum(memberIntegralValue, out IEdmEnumMember enumMember))
+                        {
+                            string literalText = ODataUriUtils.ConvertToUriLiteral(enumMember.Name, default(ODataVersion));
+                            return new ConstantNode(new ODataEnumValue(enumMember.Name, enumType.ToString()), literalText, targetTypeReference);
+                        }
                     }
+
+                    throw new ODataException(ODataErrorStrings.Binder_IsNotValidEnumConstant(memberName));
                 }
 
                 if (!TypePromotionUtils.CanConvertTo(source, source.TypeReference, targetTypeReference))

src/Microsoft.OData.Core/UriParser/TypePromotionUtils.cs

@@ -267,14 +267,15 @@ internal static bool PromoteOperandTypes(
                     return true;
                 }
 
-                // Comparing an enum with a string is valid
-                if (left != null && right != null && left.IsEnum() && right.IsString())
+                // Comparing an enum with a string or int is valid
+                if (left != null && right != null && left.IsEnum() && (right.IsString() || right.IsIntegral()))
                 {
                     right = left;
                     return true;
                 }
 
-                if (left != null && right != null && right.IsEnum() && left.IsString())
+                // Comparing an enum with a string or int is valid
+                if (left != null && right != null && right.IsEnum() && (left.IsString() || left.IsIntegral()))
                 {
                     left = right;
                     return true;

src/Microsoft.OData.Edm/ExtensionMethods/EnumHelper.cs

@@ -126,6 +126,48 @@ public static bool TryParseEnum(this IEdmEnumType enumType, string value, bool i
             return true;
         }
 
+        /// <summary>
+        /// Parse an enum integral value to enum member.
+        /// </summary>
+        /// <param name="enumType">edm enum type</param>
+        /// <param name="value">input integral value.</param>
+        /// <param name="enumMember">parsed result.</param>
+        /// <returns>true if parse succeeds, false if parse fails.</returns>
+        public static bool TryParseEnum(this IEdmEnumType enumType, long value, out IEdmEnumMember enumMember)
+        {
+            enumMember = null;
+            foreach (IEdmEnumMember member in enumType.Members)
+            {
+                if (member.Value.Value == value)
+                {
+                    enumMember = member;
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Checks if the given member name exists in the enum type.
+        /// </summary>
+        /// <param name="enumType">The enum type.</param>
+        /// <param name="memberName">The member name to check.</param>
+        /// <param name="comparison">The comparison type to use for string comparison. Default is Ordinal.</param>
+        /// <returns>True if the member name exists in the enum type; otherwise, false.</returns>
+        public static bool EnumMemberExists(this IEdmEnumType enumType, string memberName, StringComparison comparison = StringComparison.Ordinal)
+        {
+            foreach (IEdmEnumMember member in enumType.Members)
+            {
+                if (string.Equals(member.Name, memberName, comparison))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         /// <summary>
         /// Convert enum int value to string
         /// </summary>

src/Microsoft.OData.Edm/PublicAPI/net45/PublicAPI.Unshipped.txt

@@ -0,0 +1,2 @@
+static Microsoft.OData.Edm.EnumHelper.EnumMemberExists(this Microsoft.OData.Edm.IEdmEnumType enumType, string memberName, System.StringComparison comparison = System.StringComparison.Ordinal) -> bool
+static Microsoft.OData.Edm.EnumHelper.TryParseEnum(this Microsoft.OData.Edm.IEdmEnumType enumType, long value, out Microsoft.OData.Edm.IEdmEnumMember enumMember) -> bool

src/Microsoft.OData.Edm/PublicAPI/netstandard1.1/PublicAPI.Unshipped.txt

@@ -0,0 +1,2 @@
+static Microsoft.OData.Edm.EnumHelper.EnumMemberExists(this Microsoft.OData.Edm.IEdmEnumType enumType, string memberName, System.StringComparison comparison = System.StringComparison.Ordinal) -> bool
+static Microsoft.OData.Edm.EnumHelper.TryParseEnum(this Microsoft.OData.Edm.IEdmEnumType enumType, long value, out Microsoft.OData.Edm.IEdmEnumMember enumMember) -> bool

src/Microsoft.OData.Edm/PublicAPI/netstandard2.0/PublicAPI.Unshipped.txt

@@ -0,0 +1,2 @@
+static Microsoft.OData.Edm.EnumHelper.EnumMemberExists(this Microsoft.OData.Edm.IEdmEnumType enumType, string memberName, System.StringComparison comparison = System.StringComparison.Ordinal) -> bool
+static Microsoft.OData.Edm.EnumHelper.TryParseEnum(this Microsoft.OData.Edm.IEdmEnumType enumType, long value, out Microsoft.OData.Edm.IEdmEnumMember enumMember) -> bool

test/FunctionalTests/Microsoft.OData.Core.Tests/UriParser/Binders/MetadataBindingUtilsTests.cs

@@ -9,6 +9,7 @@
 using Microsoft.OData.Edm;
 using Xunit;
 using ODataErrorStrings = Microsoft.OData.Strings;
+using System.Linq;
 
 namespace Microsoft.OData.Tests.UriParser.Binders
 {
@@ -50,6 +51,199 @@ public void IfTypesCannotPromoteErrorIsThrown()
             Action convertMethod = () => MetadataBindingUtils.ConvertToTypeIfNeeded(node, targetType);
             convertMethod.Throws<ODataException>(ODataErrorStrings.MetadataBinder_CannotConvertToType(node.TypeReference.FullName(), targetType.FullName()));
         }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsIntegerMemberValueAndTargetIsEnum_ConstantNodeIsCreated()
+        {
+            // Arrange
+            int enumValue = 3;
+            bool success = WeekDayEmumType.TryParseEnum(enumValue, out IEdmEnumMember expectedMember);
+
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            Assert.True(success);
+            result.ShouldBeEnumNode(WeekDayEmumType, expectedMember.Name);
+            Assert.Equal(expectedMember.Name, result.Value.ToString());
+        }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsLongMemberValueAndTargetIsEnum_ConstantNodeIsCreated()
+        {
+            // Arrange
+            long enumValue = 7L;
+            bool success = WeekDayEmumType.TryParseEnum(enumValue, out IEdmEnumMember expectedMember);
+
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            Assert.True(success);
+            result.ShouldBeEnumNode(WeekDayEmumType, expectedMember.Name);
+            Assert.Equal(expectedMember.Name, result.Value.ToString()); // Compare the enum member name
+        }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsHugeLongMemberValueAndTargetIsEnum_ConstantNodeIsCreated()
+        {
+            // Arrange
+            long enumValue = 2147483657; // ((long)int.MaxValue + 10L).ToString()
+            bool success = EmployeeType.TryParseEnum(enumValue, out IEdmEnumMember expectedMember);
+
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(EmployeeType, false);
+
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            Assert.True(success);
+            result.ShouldBeEnumNode(EmployeeType, expectedMember.Name);
+            Assert.Equal(expectedMember.Name, result.Value.ToString()); // Compare the enum member name
+        }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsLongAsStringMemberValueAndTargetIsEnum_ConstantNodeIsCreated()
+        {
+            // Arrange
+            string enumValue = "4294967294"; // ((long)int.MaxValue + (long)int.MaxValue).ToString();
+            bool success = EmployeeType.TryParseEnum(long.Parse(enumValue), out IEdmEnumMember expectedMember);
+
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(EmployeeType, false);
+
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            Assert.True(success);
+            result.ShouldBeEnumNode(EmployeeType, expectedMember.Name);
+            Assert.Equal(expectedMember.Name, result.Value.ToString()); // Compare the enum member name
+        }
+
+        [Fact]
+        public void IfTypePromotionNeededForEnum_SourceIsIntegralMemberValueInStringAndTargetIsEnumType_ConstantNodeIsCreated()
+        {
+            // Arrange
+            string enumValue = "5";
+            bool success = WeekDayEmumType.TryParseEnum(long.Parse(enumValue), out IEdmEnumMember expectedMember);
+
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            Assert.True(success);
+            result.ShouldBeEnumNode(WeekDayEmumType, expectedMember.Name);
+            Assert.Equal(expectedMember.Name, result.Value.ToString()); // compare the enum member name
+        }
+
+        [Fact]
+        public void IfTypePromotionNeededForEnum_SourceIsMemberName_ConstantNodeIsCreated()
+        {
+            // Arrange
+            string enumValue = "Monday";
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+            // Act
+            ConstantNode result = MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference) as ConstantNode;
+
+            // Assert
+            result.ShouldBeEnumNode(WeekDayEmumType, enumValue);
+            Assert.Equal(enumValue, result.Value.ToString());
+        }
+
+        [Fact]
+        public void IfTypePromotionNeededForEnum_SourceIsIntegerExceedingDefinedIntegralLimits_ValueIsNotValidEnumConstantExceptionIsThrown()
+        {
+            // Arrange
+            int enumValue = 10;
+            SingleValueNode source = new ConstantNode(enumValue);
+            IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+            // Act
+            Action convertIfNeeded = () => MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference);
+
+            // Assert
+            convertIfNeeded.Throws<ODataException>(ODataErrorStrings.Binder_IsNotValidEnumConstant(enumValue.ToString()));
+        }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsFloatMemberValuesAndTargetIsEnum_CannotConvertToTypeExceptionIsThrown()
+        {
+            // Arrange
+            float[] floatValues = new float[] { 1.0F, 3.3F, 5.0F, 6.0F };
+
+            foreach (float enumValue in floatValues)
+            {
+                SingleValueNode source = new ConstantNode(enumValue);
+                IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+                // Act
+                Action convertIfNeeded = () => MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference);
+
+                // Assert
+                convertIfNeeded.Throws<ODataException>(ODataErrorStrings.MetadataBinder_CannotConvertToType(source.TypeReference.FullName(), targetTypeReference.FullName()));
+            }
+        }
+
+        [Fact]
+        public void IfTypePromotionNeeded_SourceIsFloatMemberValuesInStringAndTargetIsEnum_ValueIsNotValidEnumConstantExceptionIsThrown()
+        {
+            // Arrange
+            string[] floatValues = new string[] { "1.0", "3.1", "5.5", "7.0" };
+
+            foreach (string enumValue in floatValues)
+            {
+                SingleValueNode source = new ConstantNode(enumValue);
+                IEdmTypeReference targetTypeReference = new EdmEnumTypeReference(WeekDayEmumType, false);
+
+                // Act
+                Action convertIfNeeded = () => MetadataBindingUtils.ConvertToTypeIfNeeded(source, targetTypeReference);
+
+                // Assert
+                convertIfNeeded.Throws<ODataException>(ODataErrorStrings.Binder_IsNotValidEnumConstant(enumValue));
+            }
+        }
+
+        private static EdmEnumType WeekDayEmumType
+        {
+            get
+            {
+                EdmEnumType weekDayType = new EdmEnumType("NS", "WeekDay");
+                weekDayType.AddMember("Monday", new EdmEnumMemberValue(1L));
+                weekDayType.AddMember("Tuesday", new EdmEnumMemberValue(2L));
+                weekDayType.AddMember("Wednesday", new EdmEnumMemberValue(3L));
+                weekDayType.AddMember("Thursday", new EdmEnumMemberValue(4L));
+                weekDayType.AddMember("Friday", new EdmEnumMemberValue(5L));
+                weekDayType.AddMember("Saturday", new EdmEnumMemberValue(6L));
+                weekDayType.AddMember("Sunday", new EdmEnumMemberValue(7L));
+
+                return weekDayType;
+            }
+        }
+
+        private static EdmEnumType EmployeeType
+        {
+            get
+            {
+                EdmEnumType employeeType = new EdmEnumType("NS", "EmployeeType");
+                employeeType.AddMember("FullTime", new EdmEnumMemberValue((long)int.MaxValue));
+                employeeType.AddMember("PartTime", new EdmEnumMemberValue((long)int.MaxValue + 10L));
+                employeeType.AddMember("Contractor", new EdmEnumMemberValue((long)int.MaxValue + (long)int.MaxValue));
+
+                return employeeType;
+            }
+        }
         #endregion
     }
 }

test/FunctionalTests/Microsoft.OData.Core.Tests/UriParser/TypePromotionUtilsTests.cs

@@ -326,6 +326,24 @@ public void EqualsOnEnumAndStringIsSupported()
             Assert.True(left.IsEquivalentTo(HardCodedTestModel.GetPet2PetColorPatternProperty().Type));
             Assert.True(right.IsEquivalentTo(HardCodedTestModel.GetPet2PetColorPatternProperty().Type));
         }
+
+        [Fact]
+        public void EqualsOnEnumAndIntegralMemberValueIsSupported()
+        {
+            // Arrange
+            IEdmTypeReference left = HardCodedTestModel.GetPet2PetColorPatternProperty().Type;
+            IEdmTypeReference right = EdmCoreModel.Instance.GetInt32(true);
+            SingleValueNode leftNode = new SingleValuePropertyAccessNode(new ConstantNode(null)/*parent*/, new EdmStructuralProperty(new EdmEntityType("MyNamespace", "MyEntityType"), "myPropertyName", left));
+            SingleValueNode rightNode = new SingleValuePropertyAccessNode(new ConstantNode(null)/*parent*/, new EdmStructuralProperty(new EdmEntityType("MyNamespace", "MyEntityType"), "myPropertyName", right));
+
+            // Act
+            bool result = TypePromotionUtils.PromoteOperandTypes(BinaryOperatorKind.Equal, leftNode, rightNode, out left, out right, new TypeFacetsPromotionRules());
+
+            // Assert
+            Assert.True(result);
+            Assert.True(left.IsEquivalentTo(HardCodedTestModel.GetPet2PetColorPatternProperty().Type));
+            Assert.True(right.IsEquivalentTo(HardCodedTestModel.GetPet2PetColorPatternProperty().Type));
+        }
         #endregion
 
         #region PromoteOperandType Tests (For Unary Operators)

test/PublicApiTests/BaseLine/Microsoft.OData.PublicApi.net45.bsl

@@ -1635,11 +1635,21 @@ public sealed class Microsoft.OData.Edm.EdmUtil {
 ExtensionAttribute(),
 ]
 public sealed class Microsoft.OData.Edm.EnumHelper {
+    [
+    ExtensionAttribute(),
+    ]
+    public static bool EnumMemberExists (Microsoft.OData.Edm.IEdmEnumType enumType, string memberName, params System.StringComparison comparison)
+
     [
     ExtensionAttribute(),
     ]
     public static string ToStringLiteral (Microsoft.OData.Edm.IEdmEnumTypeReference type, long value)
 
+    [
+    ExtensionAttribute(),
+    ]
+    public static bool TryParseEnum (Microsoft.OData.Edm.IEdmEnumType enumType, long value, out Microsoft.OData.Edm.IEdmEnumMember& enumMember)
+
     [
     ExtensionAttribute(),
     ]

test/PublicApiTests/BaseLine/Microsoft.OData.PublicApi.netstandard1.1.bsl

@@ -1635,11 +1635,21 @@ public sealed class Microsoft.OData.Edm.EdmUtil {
 ExtensionAttribute(),
 ]
 public sealed class Microsoft.OData.Edm.EnumHelper {
+    [
+    ExtensionAttribute(),
+    ]
+    public static bool EnumMemberExists (Microsoft.OData.Edm.IEdmEnumType enumType, string memberName, params System.StringComparison comparison)
+
     [
     ExtensionAttribute(),
     ]
     public static string ToStringLiteral (Microsoft.OData.Edm.IEdmEnumTypeReference type, long value)
 
+    [
+    ExtensionAttribute(),
+    ]
+    public static bool TryParseEnum (Microsoft.OData.Edm.IEdmEnumType enumType, long value, out Microsoft.OData.Edm.IEdmEnumMember& enumMember)
+
     [
     ExtensionAttribute(),
     ]