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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../../fixtures/classes', __FILE__)
describe "Regexps with grouping" do
it "support ()" do
/(a)/.match("a").to_a.should == ["a", "a"]
end
it "allows groups to be nested" do
md = /(hay(st)a)ck/.match('haystack')
md.to_a.should == ['haystack','haysta', 'st']
end
it "raises a SyntaxError when parentheses aren't balanced" do
lambda { eval "/(hay(st)ack/" }.should raise_error(SyntaxError)
end
it "supports (?: ) (non-capturing group)" do
/(?:foo)(bar)/.match("foobar").to_a.should == ["foobar", "bar"]
# Parsing precedence
/(?:xdigit:)/.match("xdigit:").to_a.should == ["xdigit:"]
end
end
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