Use OperationType in PathItems.Operation

src/Microsoft.OpenApi/Models/OpenApiPathItem.cs

@@ -17,9 +17,6 @@ namespace Microsoft.OpenApi.Models
     /// </summary>
     public class OpenApiPathItem : OpenApiElement, IOpenApiExtension
     {
-        private readonly IDictionary<OperationType, OpenApiOperation> _operations
-            = new Dictionary<OperationType, OpenApiOperation>();
-
         /// <summary>
         /// An optional, string summary, intended to apply to all operations in this path.
         /// </summary>
@@ -33,13 +30,8 @@ private readonly IDictionary<OperationType, OpenApiOperation> _operations
         /// <summary>
         /// Gets the definition of operations on this path.
         /// </summary>
-        public IReadOnlyDictionary<string, OpenApiOperation> Operations
-        {
-            get
-            {
-                return _operations.ToDictionary(o => o.Key.GetDisplayName(), o => o.Value);
-            }
-        }
+        public IDictionary<OperationType, OpenApiOperation> Operations { get; }
+         = new Dictionary<OperationType, OpenApiOperation>();
 
         /// <summary>
         /// An alternative server array to service all operations in this path.
@@ -64,7 +56,7 @@ public IReadOnlyDictionary<string, OpenApiOperation> Operations
         /// <param name="operation">The operation item.</param>
         public void AddOperation(OperationType operationType, OpenApiOperation operation)
         {
-            _operations[operationType] = operation;
+            Operations[operationType] = operation;
         }
 
         /// <summary>
@@ -86,7 +78,7 @@ internal override void WriteAsV3(IOpenApiWriter writer)
             writer.WriteProperty(OpenApiConstants.Description, Description);
 
             // operations
-            foreach (var operation in _operations)
+            foreach (var operation in Operations)
             {
                 writer.WriteOptionalObject(operation.Key.GetDisplayName(), operation.Value, (w, o) => o.WriteAsV3(w));
             }
@@ -116,7 +108,7 @@ internal override void WriteAsV2(IOpenApiWriter writer)
             writer.WriteStartObject();
 
             // operations except "trace"
-            foreach (var operation in _operations)
+            foreach (var operation in Operations)
             {
                 if (operation.Key != OperationType.Trace)
                 {

src/Microsoft.OpenApi/Services/OpenApiVisitorBase.cs

@@ -17,7 +17,7 @@ public virtual void Visit(OpenApiServer server) { }
         public virtual void Visit(OpenApiPaths paths) { }
         public virtual void Visit(OpenApiPathItem pathItem) { }
         public virtual void Visit(OpenApiServerVariable serverVariable) { }
-        public virtual void Visit(IReadOnlyDictionary<string,OpenApiOperation> operations) { }
+        public virtual void Visit(IDictionary<OperationType,OpenApiOperation> operations) { }
         public virtual void Visit(OpenApiOperation operation) { }
         public virtual void Visit(IList<OpenApiParameter> parameters) { }
         public virtual void Visit(OpenApiParameter parameter) { }

test/Microsoft.OpenApi.Readers.Tests/CallbackTests.cs

@@ -4,6 +4,7 @@
 // ------------------------------------------------------------
 
 using System.Linq;
+using Microsoft.OpenApi.Models;
 using Xunit;
 
 namespace Microsoft.OpenApi.Readers.Tests
@@ -18,11 +19,11 @@ public void LoadSimpleCallback()
             var openApiDoc = new OpenApiStreamReader().Read(stream, out var context);
 
             var path = openApiDoc.Paths.First().Value;
-            var subscribeOperation = path.Operations["post"];
+            var subscribeOperation = path.Operations[OperationType.Post];
 
             var callback = subscribeOperation.Callbacks["mainHook"];
             var pathItem = callback.PathItems.First().Value;
-            var operation = pathItem.Operations["post"];
+            var operation = pathItem.Operations[OperationType.Post];
 
             Assert.NotNull(operation);
         }
@@ -49,7 +50,7 @@ public void LoadSimpleCallbackWithRefs()
 
             var operationPair = pathItem.Operations.First();
             var cboperation = operationPair.Value;
-            Assert.Equal("post", operationPair.Key);
+            Assert.Equal(OperationType.Post, operationPair.Key);
 
             Assert.NotNull(callback);
         }

test/Microsoft.OpenApi.Readers.Tests/OperationTests.cs

@@ -28,7 +28,7 @@ public void CheckPetStoreFirstOperation()
         {
             var firstPath = _PetStoreDoc.Paths.First().Value;
             var firstOperation = firstPath.Operations.First();
-            Assert.Equal("get", firstOperation.Key);
+            Assert.Equal(OperationType.Get, firstOperation.Key);
             Assert.Equal("findPets", firstOperation.Value.OperationId);
             Assert.Equal(2, firstOperation.Value.Parameters.Count);
         }
@@ -65,7 +65,7 @@ public void DoesAPathExist()
         [Fact]
         public void GetPostOperation()
         {
-            var postOperation = _PetStoreDoc.Paths["/pets"].Operations["post"];
+            var postOperation = _PetStoreDoc.Paths["/pets"].Operations[OperationType.Post];
 
             Assert.Equal("addPet", postOperation.OperationId);
 
@@ -75,7 +75,7 @@ public void GetPostOperation()
         [Fact]
         public void GetResponses()
         {
-            var getOperation = _PetStoreDoc.Paths["/pets"].Operations["get"];
+            var getOperation = _PetStoreDoc.Paths["/pets"].Operations[OperationType.Get];
 
             var responses = getOperation.Responses;
 

test/Microsoft.OpenApi.Readers.Tests/SchemaTests.cs

@@ -3,6 +3,7 @@
 //  Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
 // ------------------------------------------------------------
 
+using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.Readers.ParseNodes;
 using Microsoft.OpenApi.Readers.V3;
 using Xunit;
@@ -18,7 +19,7 @@ public void CheckPetStoreApiInfo()
 
             var openApiDoc = new OpenApiStreamReader().Read(stream, out var context);
 
-            var operation = openApiDoc.Paths["/pets"].Operations["get"];
+            var operation = openApiDoc.Paths["/pets"].Operations[OperationType.Get];
             var schema = operation.Responses["200"].Content["application/json"].Schema;
             Assert.NotNull(schema);
         }