End-to-end serialization tests

Author: YohDeadfall

src/libraries/System.Text.Json/tests/Common/PropertyNameTests.cs

@@ -15,40 +15,54 @@ public abstract partial class PropertyNameTests : SerializerTests
         public PropertyNameTests(JsonSerializerWrapper serializerWrapper) : base(serializerWrapper) { }
 
         [Fact]
-        public async Task CamelCaseDeserializeNoMatch()
+        public async Task BuiltInPolicyDeserializeNoMatch()
         {
-            var options = new JsonSerializerOptions();
-            options.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
-
-            SimpleTestClass obj = await Serializer.DeserializeWrapper<SimpleTestClass>(@"{""MyInt16"":1}", options);
-
-            // This is 0 (default value) because the data does not match the property "MyInt16" that is assuming camel-casing of "myInt16".
-            Assert.Equal(0, obj.MyInt16);
+            // This is 0 (default value) because the data does not match the property "MyInt16" using the specified policy.
+            await DeserializeAndAssert(JsonNamingPolicy.CamelCase, @"{""MyInt16"":1}", 0);
+            await DeserializeAndAssert(JsonNamingPolicy.SnakeCaseLower, @"{""MyInt16"":1}", 0);
+            await DeserializeAndAssert(JsonNamingPolicy.SnakeCaseUpper, @"{""MyInt16"":1}", 0);
+            await DeserializeAndAssert(JsonNamingPolicy.KebabCaseLower, @"{""MyInt16"":1}", 0);
+            await DeserializeAndAssert(JsonNamingPolicy.KebabCaseUpper, @"{""MyInt16"":1}", 0);
         }
 
         [Fact]
-        public async Task CamelCaseDeserializeMatch()
+        public async Task BuiltInPolicyDeserializeMatch()
         {
-            var options = new JsonSerializerOptions();
-            options.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
+            // This is 1 because the data matches the property "MyInt16" using the specified policy.
+            await DeserializeAndAssert(JsonNamingPolicy.CamelCase, @"{""myInt16"":1}", 1);
+            await DeserializeAndAssert(JsonNamingPolicy.SnakeCaseLower, @"{""my_int16"":1}", 1);
+            await DeserializeAndAssert(JsonNamingPolicy.SnakeCaseUpper, @"{""MY_INT16"":1}", 1);
+            await DeserializeAndAssert(JsonNamingPolicy.KebabCaseLower, @"{""my-int16"":1}", 1);
+            await DeserializeAndAssert(JsonNamingPolicy.KebabCaseUpper, @"{""MY-INT16"":1}", 1);            
+        }
 
-            SimpleTestClass obj = await Serializer.DeserializeWrapper<SimpleTestClass>(@"{""myInt16"":1}", options);
+        private async Task DeserializeAndAssert(JsonNamingPolicy policy, string json, short expected)
+        {
+            var options = new JsonSerializerOptions { PropertyNamingPolicy = policy };
+            var obj = await Serializer.DeserializeWrapper<SimpleTestClass>(json, options);
 
-            // This is 1 because the data matches the property "MyInt16" that is assuming camel-casing of "myInt16".
-            Assert.Equal(1, obj.MyInt16);
+            Assert.Equal(expected, obj.MyInt16);
         }
 
         [Fact]
-        public async Task CamelCaseSerialize()
+        public async Task BuiltInPolicySerialize()
         {
-            var options = new JsonSerializerOptions();
-            options.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
+            await SerializeAndAssert(JsonNamingPolicy.CamelCase, @"""myInt16"":0", @"""myInt32"":0");
+            await SerializeAndAssert(JsonNamingPolicy.SnakeCaseLower, @"""my_int16"":0", @"""my_int32"":0");
+            await SerializeAndAssert(JsonNamingPolicy.SnakeCaseUpper, @"""MY_INT16"":0", @"""MY_INT32"":0");
+            await SerializeAndAssert(JsonNamingPolicy.KebabCaseLower, @"""my-int16"":0", @"""my-int32"":0");
+            await SerializeAndAssert(JsonNamingPolicy.KebabCaseUpper, @"""MY-INT16"":0", @"""MY-INT32"":0");
 
-            SimpleTestClass obj = await Serializer.DeserializeWrapper<SimpleTestClass>(@"{}", options);
+            async Task SerializeAndAssert(JsonNamingPolicy policy, string myInt16, string myInt32)
+            {
+                var options = new JsonSerializerOptions { PropertyNamingPolicy = policy };
+                var obj = await Serializer.DeserializeWrapper<SimpleTestClass>(@"{}", options);
 
-            string json = await Serializer.SerializeWrapper(obj, options);
-            Assert.Contains(@"""myInt16"":0", json);
-            Assert.Contains(@"""myInt32"":0", json);
+                string json = await Serializer.SerializeWrapper(obj, options);
+
+                Assert.Contains(myInt16, json);
+                Assert.Contains(myInt32, json);
+            }
         }
 
         [Fact]