Support getting text from a org.eclipse.jface.text.source.SourceViewer

[henryju]

Hi,

We have started to use SourceViewer widget in our plugin, and I can't find a way to assert the content.

Is there are way to do it already?

[olkornii]

Hi, I haven't worked with this much, but maybe it will be useful:
https://github.com/eclipse/xtext/blob/bd76ce47240209f956eba776624f9df4cbf8e73f/org.eclipse.xtext.ui/src/org/eclipse/xtext/ui/views/AbstractSourceView.java#L126C51-L126C51