The fasta parser generates begin/end event pairs such as
[beginCompilationUnit] and [endCompilationUnit].
Each event should be generated "within" a "higher level" begin/end event pair,
except for [beginCompilationUnit] and [endCompilationUnit],
which should not be generated within any begin/end event pair.
This CL updates the fasta test listener and associated test code to assert that
[endTopLevelDeclaration] is generated within or is enclosed by
a begin/end "CompilationUnit" event pair, and that the [beginCompilationUnit]
and [endCompilationUnit] events are not enclosed by any begin/end event pairs.
R=paulberry@google.com
Review-Url: https://codereview.chromium.org/2993833002 .
Dan Rubel
6e4f00a27c