add a function to convert primitive type to RequestContent (Azure#38808)

* add a function to convert primitive type to RequestContent

* add test

* add more test

Author: chunyu3

sdk/core/Azure.Core/src/Shared/RequestContentHelper.cs

@@ -87,5 +87,12 @@ public static RequestContent FromDictionary(IDictionary<string, BinaryData> dict
 
             return content;
         }
+
+        public static RequestContent FromObject(object value)
+        {
+            var content = new Utf8JsonRequestContent();
+            content.JsonWriter.WriteObjectValue(value);
+            return content;
+        }
     }
 }

sdk/core/Azure.Core/tests/RequestContentHelperTests.cs

@@ -6,7 +6,6 @@
 using System.IO;
 using System.Text.Json;
 using System.Xml;
-using System.Xml.Linq;
 using NUnit.Framework;
 
 namespace Azure.Core.Tests
@@ -23,6 +22,11 @@ public static IEnumerable<TestCaseData> GetDateTimeData()
             yield return new TestCaseData(DateTimeOffset.Parse("2022-08-26T18:38:00Z"), DateTimeOffset.Parse("2022-09-26T18:38:00Z"));
         }
 
+        public static IEnumerable<TestCaseData> GetOneDateTimeData()
+        {
+            yield return new TestCaseData(DateTimeOffset.Parse("2022-08-26T18:38:00Z"));
+        }
+
         [TestCase(1, 2)]
         [TestCase("a", "b")]
         [TestCase(true, false)]
@@ -148,5 +152,39 @@ public void TestBinaryDataFromDictionary()
                 }
             }
         }
+
+        [TestCase("a")]
+        [TestCase(true)]
+        [TestCase(1)]
+        [TestCase(1.0)]
+        [TestCaseSource("GetOneDateTimeData")]
+        public void TestFromObject<T>(T value)
+        {
+            var content = RequestContentHelper.FromObject(value);
+            var stream = new MemoryStream();
+            content.WriteTo(stream, default);
+            stream.Position = 0;
+            var document = JsonDocument.Parse(stream);
+            switch (value)
+            {
+                case string:
+                    Assert.AreEqual(JsonValueKind.String, document.RootElement.ValueKind);
+                    Assert.AreEqual($"\"{value}\"", document.RootElement.GetRawText());
+                    break;
+                case bool:
+                    Assert.AreEqual(value, document.RootElement.GetBoolean());
+                    break;
+                case int:
+                    Assert.AreEqual(value, document.RootElement.GetInt32());
+                    break;
+                case double:
+                    Assert.AreEqual(value, document.RootElement.GetDouble());
+                    break;
+                case DateTimeOffset:
+                    Assert.AreEqual(JsonValueKind.String, document.RootElement.ValueKind);
+                    Assert.AreEqual(value, DateTimeOffset.Parse(document.RootElement.GetString()));
+                    break;
+            }
+        }
     }
 }