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35 lines
1.1 KiB
Ruby
35 lines
1.1 KiB
Ruby
require_relative '../../spec_helper'
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require_relative '../fixtures/classes'
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describe "Regexps with grouping" do
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it "support ()" do
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/(a)/.match("a").to_a.should == ["a", "a"]
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end
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it "allows groups to be nested" do
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md = /(hay(st)a)ck/.match('haystack')
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md.to_a.should == ['haystack','haysta', 'st']
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end
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it "raises a SyntaxError when parentheses aren't balanced" do
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-> { eval "/(hay(st)ack/" }.should raise_error(SyntaxError)
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end
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it "supports (?: ) (non-capturing group)" do
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/(?:foo)(bar)/.match("foobar").to_a.should == ["foobar", "bar"]
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# Parsing precedence
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/(?:xdigit:)/.match("xdigit:").to_a.should == ["xdigit:"]
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end
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it "group names cannot start with digits or minus" do
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-> { Regexp.new("(?<1a>a)") }.should raise_error(RegexpError)
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-> { Regexp.new("(?<-a>a)") }.should raise_error(RegexpError)
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end
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it "ignore capture groups in line comments" do
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/^
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(a) # there is a capture group on this line
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b # there is no capture group on this line (not even here)
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$/x.match("ab").to_a.should == [ "ab", "a" ]
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end
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end
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