public static void WriteCyclicFail(int depth)
{
var rootObj = new TestClassWithCycle("root");
CreateObjectHierarchy(1, depth, rootObj);
{
var options = new JsonSerializerOptions();
options.MaxDepth = depth + 1;
// No exception since depth was not greater than MaxDepth.
string json = JsonSerializer.Serialize(rootObj, options);
Assert.False(string.IsNullOrEmpty(json));
}
{
var options = new JsonSerializerOptions();
options.MaxDepth = depth;
JsonException ex = Assert.Throws <JsonException>(() => JsonSerializer.Serialize(rootObj, options));
// Exception should contain the path and MaxDepth.
// Since the last Parent property is null, the serializer moves onto the Children property.
string expectedPath = "$" + string.Concat(Enumerable.Repeat(".Parent", depth - 1));
Assert.Contains(expectedPath, ex.Path);
Assert.Contains(depth.ToString(), ex.ToString());
}
}
public static void DeepTypeCycleWithRoundTrip()
{
TestClassWithCycle root = new TestClassWithCycle("root");
TestClassWithCycle parent = new TestClassWithCycle("parent");
root.Parent = parent;
root.Children.Add(new TestClassWithCycle("child1"));
root.Children.Add(new TestClassWithCycle("child2"));
// A cycle in just Types (not data) is allowed.
string json = JsonSerializer.Serialize(root);
// Round-trip the JSON.
TestClassWithCycle rootCopy = JsonSerializer.Deserialize <TestClassWithCycle>(json);
Assert.Equal("root", rootCopy.Name);
Assert.Equal(2, rootCopy.Children.Count);
Assert.Equal("parent", rootCopy.Parent.Name);
Assert.Equal(0, rootCopy.Parent.Children.Count);
Assert.Null(rootCopy.Parent.Parent);
Assert.Equal("child1", rootCopy.Children[0].Name);
Assert.Equal(0, rootCopy.Children[0].Children.Count);
Assert.Null(rootCopy.Children[0].Parent);
Assert.Equal("child2", rootCopy.Children[1].Name);
Assert.Equal(0, rootCopy.Children[1].Children.Count);
Assert.Null(rootCopy.Children[1].Parent);
}
public static void WriteCyclicFailDefault()
{
TestClassWithCycle obj = new TestClassWithCycle();
obj.Parent = obj;
// We don't allow graph cycles; we throw JsonException instead of an unrecoverable StackOverflow.
Assert.Throws <JsonException>(() => JsonSerializer.Serialize(obj));
}
public static void WriteCyclicFail()
{
TestClassWithCycle obj = new TestClassWithCycle();
obj.Initialize();
// We don't allow cycles; we throw InvalidOperation instead of an unrecoverable StackOverflow.
Assert.Throws <InvalidOperationException>(() => JsonSerializer.ToString(obj));
}
private static TestClassWithCycle CreateObjectHierarchy(int i, int max, TestClassWithCycle previous)
{
if (i == max)
{
return(null);
}
var obj = new TestClassWithCycle(i.ToString());
previous.Parent = obj;
return(CreateObjectHierarchy(++i, max, obj));
}
[InlineData(10, 0)] // 0 (or default) max depth is treated as 64
public static void WriteCyclic(int objectHierarchyDepth, int maxDepth)
{
var rootObj = new TestClassWithCycle("root");
CreateObjectHierarchy(1, objectHierarchyDepth, rootObj);
var options = new JsonSerializerOptions();
options.MaxDepth = maxDepth;
string json = JsonSerializer.Serialize(rootObj, options);
Assert.False(string.IsNullOrEmpty(json));
}
[InlineData(70, 0, 63)] // 0 (or default) max depth is treated as 64
public static void WriteCyclicFail(int objectHierarchyDepth, int maxDepth, int expectedPathDepth)
{
var rootObj = new TestClassWithCycle("root");
CreateObjectHierarchy(1, objectHierarchyDepth, rootObj);
var options = new JsonSerializerOptions();
options.MaxDepth = maxDepth;
JsonException ex = Assert.Throws <JsonException>(() => JsonSerializer.Serialize(rootObj, options));
// Exception should contain the path and MaxDepth.
// Since the last Parent property is null, the serializer moves onto the Children property.
string expectedPath = "$" + string.Concat(Enumerable.Repeat(".Parent", expectedPathDepth));
Assert.Contains(expectedPath, ex.Path);
Assert.Contains(maxDepth.ToString(), ex.ToString());
}
public static void WriteCyclicFail(int depth)
{
var rootObj = new TestClassWithCycle("root");
CreateObjectHierarchy(1, depth, rootObj);
{
var options = new JsonSerializerOptions();
options.MaxDepth = depth + 1;
// No exception since depth was not passed.
string json = JsonSerializer.Serialize(rootObj, options);
Assert.False(string.IsNullOrEmpty(json));
}
{
var options = new JsonSerializerOptions();
options.MaxDepth = depth;
Assert.Throws <JsonException>(() => JsonSerializer.Serialize(rootObj, options));
}
}
public void Initialize()
{
Parent = this;
}