ISSUE #1228: Add unit test for path external reference to ConvertToOpenApiReferenceV3Tests

Author: elize-vdr

test/Microsoft.OpenApi.Readers.Tests/ReferenceService/ConvertToOpenApiReferenceV3Tests.cs

@@ -124,5 +124,24 @@ public void ParseLocalFileReference()
             reference.Type.Should().Be(referenceType);
             reference.ExternalResource.Should().Be(input);
         }
+
+        [Fact]
+        public void ParseExternalPathReference()
+        {
+            // Arrange
+            var versionService = new OpenApiV3VersionService(Diagnostic);
+            var externalResource = "externalSchema.json";
+            var referenceJsonEscaped = "/paths/~1applications~1{AppUUID}~1services~1{ServiceName}";
+            var input = $"{externalResource}#{referenceJsonEscaped}";
+            var id = "/applications/{AppUUID}/services/{ServiceName}";
+
+            // Act
+            var reference = versionService.ConvertToOpenApiReference(input, null);
+
+            // Assert
+            reference.Type.Should().BeNull();
+            reference.ExternalResource.Should().Be(externalResource);
+            reference.Id.Should().Be(id);
+        }
     }
 }