mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
41 lines
1,017 B
Ruby
41 lines
1,017 B
Ruby
require_relative '../../spec_helper'
|
|
require_relative 'shared/extract_range_matched'
|
|
require 'strscan'
|
|
|
|
describe "StringScanner#pre_match" do
|
|
before :each do
|
|
@s = StringScanner.new("This is a test")
|
|
end
|
|
|
|
it "returns the pre-match (in the regular expression sense) of the last scan" do
|
|
@s.pre_match.should == nil
|
|
@s.scan(/\w+\s/)
|
|
@s.pre_match.should == ""
|
|
@s.getch
|
|
@s.pre_match.should == "This "
|
|
@s.get_byte
|
|
@s.pre_match.should == "This i"
|
|
@s.get_byte
|
|
@s.pre_match.should == "This is"
|
|
end
|
|
|
|
it "returns nil if there's no match" do
|
|
@s.scan(/\s+/)
|
|
@s.pre_match.should == nil
|
|
end
|
|
|
|
it "is more than just the data from the last match" do
|
|
@s.scan(/\w+/)
|
|
@s.scan_until(/a te/)
|
|
@s.pre_match.should == "This is "
|
|
end
|
|
|
|
it "is not changed when the scanner's position changes" do
|
|
@s.scan_until(/\s+/)
|
|
@s.pre_match.should == "This"
|
|
@s.pos -= 1
|
|
@s.pre_match.should == "This"
|
|
end
|
|
|
|
it_behaves_like :extract_range_matched, :pre_match
|
|
end
|