public static void InternalValueFields()
{
// Use reflection to inspect the internal state of the 3 fields that hold values.
// There is not another way to verify, and using a debug watch causes nodes to be created.
FieldInfo elementField = typeof(JsonObject).GetField("_jsonElement", BindingFlags.Instance | BindingFlags.NonPublic);
Assert.NotNull(elementField);
FieldInfo jsonDictionaryField = typeof(JsonObject).GetField("_dictionary", BindingFlags.Instance | BindingFlags.NonPublic);
Assert.NotNull(jsonDictionaryField);
Type jsonPropertyDictionaryType = typeof(JsonObject).Assembly.GetType("System.Text.Json.JsonPropertyDictionary`1");
Assert.NotNull(jsonPropertyDictionaryType);
jsonPropertyDictionaryType = jsonPropertyDictionaryType.MakeGenericType(new Type[] { typeof(JsonNode) });
FieldInfo listField = jsonPropertyDictionaryType.GetField("_propertyList", BindingFlags.Instance | BindingFlags.NonPublic);
Assert.NotNull(listField);
FieldInfo dictionaryField = jsonPropertyDictionaryType.GetField("_propertyDictionary", BindingFlags.Instance | BindingFlags.NonPublic);
Assert.NotNull(dictionaryField);
using (MemoryStream stream = new MemoryStream(SimpleTestClass.s_data))
{
// Only JsonElement is present.
JsonNode node = JsonNode.Parse(stream);
object jsonDictionary = jsonDictionaryField.GetValue(node);
Assert.Null(jsonDictionary); // Value is null until converted from JsonElement.
Assert.NotNull(elementField.GetValue(node));
Test();
// Cause the single JsonElement to expand into individual JsonElement nodes.
Assert.Equal(1, node.AsObject()["MyInt16"].GetValue <int>());
Assert.Null(elementField.GetValue(node));
jsonDictionary = jsonDictionaryField.GetValue(node);
Assert.NotNull(jsonDictionary);
Assert.NotNull(listField.GetValue(jsonDictionary));
Assert.NotNull(dictionaryField.GetValue(jsonDictionary)); // The dictionary threshold was reached.
Test();
void Test()
{
string actual = node.ToJsonString();
// Replace the escaped "+" sign used with DateTimeOffset.
actual = actual.Replace("\\u002B", "+");
Assert.Equal(SimpleTestClass.s_json.StripWhitespace(), actual);
}
}
}