public void Start_ExecutionContextChangesInMoveNextDontFlowOut()
{
var al = new AsyncLocal<int> { Value = 0 };
int calls = 0;
var dsm = new DelegateStateMachine
{
MoveNextDelegate = () =>
{
al.Value++;
calls++;
}
};
dsm.MoveNext();
Assert.Equal(1, al.Value);
Assert.Equal(1, calls);
dsm.MoveNext();
Assert.Equal(2, al.Value);
Assert.Equal(2, calls);
AsyncValueTaskMethodBuilder<int> b = ValueTask<int>.CreateAsyncMethodBuilder();
b.Start(ref dsm);
Assert.Equal(2, al.Value); // change should not be visible
Assert.Equal(3, calls);
// Make sure we've not caused the Task to be allocated
b.SetResult(42);
ValueTask<int> vt = b.Task;
Assert.NotSame(vt.AsTask(), vt.AsTask());
}
