public void ThrowsForNoMatch()
{
// Given
TestDocument a = new TestDocument
{
{ WebKeys.Xref, "fooBAR" }
};
TestExecutionContext context = new TestExecutionContext();
context.Outputs.Dictionary.Add(
nameof(Content),
new IDocument[] { a }.ToImmutableArray());
// When, Then
Should.Throw <ExecutionException>(() => context.GetXrefDocument("fizzbuzz"));
}