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require File.expand_path('../../../spec_helper', __FILE__)
require 'strscan'
describe "StringScanner#match?" do
before :each do
@s = StringScanner.new("This is a test")
end
it "returns the length of the match and the scan pointer is not advanced" do
@s.match?(/\w+/).should == 4
@s.match?(/\w+/).should == 4
@s.pos.should == 0
end
it "returns nil if there's no match" do
@s.match?(/\d+/).should == nil
@s.match?(/\s+/).should == nil
end
it "effects pre_match" do
@s.scan(/\w+/)
@s.scan(/\s/)
@s.pre_match.should == "This"
@s.match?(/\w+/)
@s.pre_match.should == "This "
end
end
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