public DocumentFormatterTests()
{
var fixture = new Fixture().Customize(new AutoNSubstituteCustomization());
document = Substitute.For <Document>();
document.Type.Returns("Text");
document.Language.Returns(fixture.Create <string>());
document.FullName.Returns(fixture.Create <string>());
textView = Substitute.For <IWpfTextView, ITextView>();
vsTextView = Substitute.For <IVsTextView, IVsUserData>();
vsTextView
.As <IVsUserData>()
.WhenForAnyArgs(u => u.GetData(default, out _))
