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require 'rubygems'
require 'benchmark'
require 'rspec'
require 'rspec/core/shared_context'
require 'polyglot'
$LOAD_PATH.unshift File.expand_path('../../lib')
require 'treetop'
include Treetop
module Treetop
module ExampleGroupInstanceMethods
module ClassMethods
attr_accessor :parser_class_under_test
def testing_expression(expression_under_test)
testing_grammar(%{
grammar Test
rule expression_under_test
}+expression_under_test+%{
end
end
}.tabto(0))
end
def testing_grammar(grammar_under_test)
grammar_node = parse_with_metagrammar(grammar_under_test.strip, :module_or_grammar)
parser_code = grammar_node.compile
class_eval(parser_code)
self.parser_class_under_test = class_eval(grammar_node.parser_name)
end
def parse_with_metagrammar(input, root)
parser = Treetop::Compiler::MetagrammarParser.new
parser.root = root
node = parser.parse(input)
raise parser.failure_reason unless node
node
end
end
attr_reader :parser
def parse_with_metagrammar(input, root)
self.class.parse_with_metagrammar(input, root)
end
def parser_class_under_test
self.class.parser_class_under_test
end
def parse(input, options = {})
@parser = parser_class_under_test.new
unless options[:consume_all_input].nil?
parser.consume_all_input = options.delete(:consume_all_input)
end
result = parser.parse(input, options)
yield result if block_given?
result
end
def parse_multibyte(input, options = {})
require 'active_support/all'
if RUBY_VERSION !~ /^1.9/ && 'NONE' == $KCODE then $KCODE = 'UTF8' end
# rspec 1.3 used to do something similar (set it to 'u') that we need
# for activerecord multibyte wrapper to kick in (1.8 only? @todo)
parse(input.mb_chars, options)
end
def compiling_grammar(grammar_under_test)
lambda {
grammar_node = parse_with_metagrammar(grammar_under_test.strip, :grammar)
parser_code = grammar_node.compile
[grammar_node, parser_code]
}
end
def compiling_expression(expression_under_test)
compiling_grammar(%{
grammar Test
rule expression_under_test
#{expression_under_test}
end
end
}.tabto(0))
end
def optionally_benchmark(&block)
if BENCHMARK
Benchmark.bm do |x|
x.report(&block)
end
else
yield
end
end
end
end
RSpec.configure do |c|
c.mock_with :rr
c.extend Treetop::ExampleGroupInstanceMethods::ClassMethods
c.include Treetop::ExampleGroupInstanceMethods
end
class Symbol
def to_proc
lambda do |x|
x.send(self)
end
end unless method_defined?(:to_proc)
end
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