Correctly handle JArray in generator, closes RicoSuter/NSwag#755

Author: RicoSuter

src/NJsonSchema.Tests/Generation/ArrayGenerationTests.cs

@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+using Newtonsoft.Json.Linq;
+using NJsonSchema.Generation;
+using Xunit;
+
+namespace NJsonSchema.Tests.Generation
+{
+    public class ArrayGenerationTests
+    {
+        public class ClassWithJArray
+        {
+            public string Foo { get; set; }
+
+            public JArray Array { get; set; }
+        }
+
+        [Fact]
+        public async Task When_property_is_JArray_then_schema_with_any_array_is_generated()
+        {
+            //// Act
+            var schema = await JsonSchema4.FromTypeAsync<ClassWithJArray>(new JsonSchemaGeneratorSettings { SchemaType = SchemaType.OpenApi3 });
+            var json = schema.ToJson();
+
+            //// Assert
+            Assert.Equal(2, schema.ActualProperties.Count);
+            var arrayProperty = schema.ActualProperties["Array"].ActualTypeSchema;
+            Assert.Equal(JsonObjectType.Array, arrayProperty.Type);
+            Assert.True(arrayProperty.Item.ActualTypeSchema.IsAnyType);
+        }
+    }
+}

src/NJsonSchema/Generation/DefaultReflectionService.cs

@@ -105,6 +105,9 @@ public virtual JsonTypeDescription GetDescription(Type type, IEnumerable<Attribu
             if (type == typeof(byte[]))
                 return JsonTypeDescription.Create(type, JsonObjectType.String, isNullable, JsonFormatStrings.Byte);
 
+            if (type == typeof(JArray))
+                return JsonTypeDescription.Create(type, JsonObjectType.Array, isNullable, null);
+
             if (type == typeof(JObject) || 
                 type == typeof(JToken) ||
                 type.FullName == "System.Dynamic.ExpandoObject" ||