Fix error ranges for OData actions

src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiResponseGenerator.cs

@@ -208,8 +208,15 @@ public static OpenApiResponses CreateResponses(this ODataContext context, IEdmOp
                 responses.Add(Constants.StatusCode200, response);
             }
 
-            // Both action & function have the default response.
-            responses.Add(Constants.StatusCodeDefault, Constants.StatusCodeDefault.GetResponse());
+            if (context.Settings.ErrorResponsesAsDefault)
+            {
+                responses.Add(Constants.StatusCodeDefault, Constants.StatusCodeDefault.GetResponse());
+            }
+            else
+            {
+                responses.Add(Constants.StatusCodeClass4XX, Constants.StatusCodeClass4XX.GetResponse());
+                responses.Add(Constants.StatusCodeClass5XX, Constants.StatusCodeClass5XX.GetResponse());
+            }
 
             return responses;
         }

src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj

@@ -24,6 +24,7 @@
 - Adds list of all derived types for discriminator mapping #219
 - Fixes reading restriction annotations for entity types defining navigation properties #220
 - Enables configuring appending bound operations on derived types #221
+- Add error ranges for OData actions when ErrorResponsesAsDefault is set to false #218
     </PackageReleaseNotes>
     <AssemblyName>Microsoft.OpenApi.OData.Reader</AssemblyName>
     <AssemblyOriginatorKeyFile>..\..\tool\Microsoft.OpenApi.OData.snk</AssemblyOriginatorKeyFile>

test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiErrorSchemaGeneraratorTests.cs

@@ -9,7 +9,7 @@
 using Xunit;
 
 namespace Microsoft.OpenApi.OData.Tests;
-public class OpenApiErrorSchemaGeneraratorTests
+public class OpenApiErrorSchemaGeneratorTests
 {
     [Fact]
     public void AddsEmptyInnerErrorWhenNoComplexTypeIsProvided()

test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiResponseGeneratorTests.cs

@@ -306,5 +306,39 @@ public void CreateResponseForEdmActionReturnCorrectResponses(string actionName,
             Assert.Equal(2, responses.Count);
             Assert.Equal(new string[] { responseCode, "default" }, responses.Select(r => r.Key));
         }
+
+        [Theory]
+        [InlineData("assignLicense", false, "200")]
+        [InlineData("activateService", false, "204")]
+        [InlineData("verifySignature", true, "200")]
+        public void CreateResponseForEdmActionWhenErrorResponsesAsDefaultIsSet(string actionName, bool errorAsDefault, string responseCode)
+        {
+            // Arrange
+            IEdmModel model = EdmModelHelper.GraphBetaModel;
+            var settings = new OpenApiConvertSettings
+            {
+                ErrorResponsesAsDefault = errorAsDefault,
+            };
+            ODataContext context = new ODataContext(model, settings);
+
+            // Act
+            OpenApiResponses responses;
+            IEdmOperation operation = model.SchemaElements.OfType<IEdmOperation>().First(o => o.Name == actionName);
+            Assert.NotNull(operation); // guard
+            ODataPath path = new(new ODataOperationSegment(operation));
+            responses = context.CreateResponses(operation, path);
+
+            // Assert
+            Assert.NotNull(responses);
+            Assert.NotEmpty(responses);
+            if (errorAsDefault)
+            {
+                Assert.Equal(new string[] { responseCode, "default" }, responses.Select(r => r.Key));
+            }
+            else
+            {
+                Assert.Equal(new string[] { responseCode, "4XX", "5XX" }, responses.Select(r => r.Key));
+            }
+        }
     }
 }