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require 'spec_helper'
require 'parslet'
describe Parslet::Expression::Treetop do
include Parslet
describe "positive samples" do
[ # pattern # input
"'abc'", 'abc',
"...", 'abc',
"[1-4]", '3',
"'abc'?", 'abc',
"'abc'?", '',
"('abc')", 'abc',
"'a' 'b'", 'ab',
"'a' ('b')", 'ab',
"'a' / 'b'", 'a',
"'a' / 'b'", 'b',
"'a'*", 'aaa',
"'a'*", '',
"'a'+", 'aa',
"'a'+", 'a',
"'a'{1,2}", 'a',
"'a'{1,2}", 'aa',
"'a'{1,}", 'a',
"'a'{1,}", 'aa',
"'a'{,2}", '',
"'a'{,2}", 'a',
"'a'{,2}", 'aa',
].each_slice(2) do |pattern, input|
context "exp(#{pattern.inspect})" do
let(:parslet) { exp(pattern) }
subject { parslet }
it { should parse(input) }
context "string representation" do
subject { exp(parslet.to_s) }
it { should parse(input, :trace => true) }
end
end
end
end
describe "negative samples" do
[ # pattern # input
"'abc'", 'cba',
"[1-4]", '5',
"'a' / 'b'", 'c',
"'a'+", '',
"'a'{1,2}", '',
"'a'{1,2}", 'aaa',
"'a'{1,}", '',
"'a'{,2}", 'aaa',
].each_slice(2) do |pattern, input|
context "exp(#{pattern.inspect})" do
subject { exp(pattern) }
it { should_not parse(input) }
end
end
end
end
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