public void Dispose_causes_handler_not_to_be_called()
{
var doc = new DomDocument();
var attr = doc.AppendElement("hello").AppendAttribute("a");
var evts = new TestActionDispatcher <DomAttributeEvent>(_ => {});
var observer = doc.ObserveAttributes(doc.DocumentElement, evts.Invoke);
observer.Dispose();
attr.Value = "changed";
Assert.Equal(0, evts.CallCount);
}
public void ObserveAttributes_should_invoke_optimized_registration()
{
var doc = new DomDocument();
doc.AppendElement("hello").AppendElement("world");
var evts = new TestActionDispatcher <DomAttributeEvent>(_ => {});
var observer = doc.ObserveAttributes(doc.DocumentElement, "l", evts.Invoke, DomScope.TargetAndDescendants);
doc.QuerySelectorAll("*").Attribute("l", "k");
Assert.Equal(2, evts.CallCount);
Assert.Equal("hello", evts.ArgsForCall(0).Target.LocalName);
Assert.Equal("world", evts.ArgsForCall(1).Target.LocalName);
Assert.Equal("l", evts.ArgsForCall(1).LocalName);
}
public void ObserveAttributes_callback_should_be_invoked_at_time_after_attribute_value_has_changed(Action <DomElement> op)
{
var doc = new DomDocument();
var element = doc.AppendElement("e");
element.Attribute("attr", "oldValue");
string attributeValueInCallback = null;
doc.ObserveAttributes(element, e => {
attributeValueInCallback = element.Attribute("attr");
});
op(element);
Assert.NotEqual("oldValue", attributeValueInCallback);
}
public void ObserveAttributes_callback_should_be_invoked_on_removing_an_attribute(Action <DomElement> callback)
{
var doc = new DomDocument().LoadXml(@"
<root attr='root value' />
".Replace("'", "\""));
var element = doc.QuerySelector("root");
var evts = new TestActionDispatcher <DomAttributeEvent>(_ => {});
doc.ObserveAttributes(element, evts.Invoke);
callback(element);
Assert.Equal(1, evts.CallCount);
Assert.Equal("root value", evts.ArgsForCall(0).OldValue);
Assert.Null(evts.ArgsForCall(0).Value);
Assert.Equal("attr", evts.ArgsForCall(0).LocalName);
}
