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63 lines
2.5 KiB
Ruby
63 lines
2.5 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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it "does not consider # inside a character class as a comment" do
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# From https://github.com/rubocop/rubocop/blob/39fcf1c568/lib/rubocop/cop/utils/format_string.rb#L18
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regexp = /
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% (?<type>%) # line comment
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| % (?<flags>(?-mix:[ #0+-]|(?-mix:(\d+)\$))*) (?#group comment)
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(?:
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(?: (?-mix:(?<width>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:\.(?<precision>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:<(?<name>\w+)>)?
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| (?-mix:(?<width>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:<(?<name>\w+)>) (?-mix:\.(?<precision>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))?
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| (?-mix:<(?<name>\w+)>) (?<more_flags>(?-mix:[ #0+-]|(?-mix:(\d+)\$))*) (?-mix:(?<width>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:\.(?<precision>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))?
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) (?-mix:(?<type>[bBdiouxXeEfgGaAcps]))
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| (?-mix:(?<width>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:\.(?<precision>(?-mix:\d+|(?-mix:\*(?-mix:(\d+)\$)?))))? (?-mix:\{(?<name>\w+)\})
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)
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/x
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regexp.named_captures.should == {
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"type" => [1, 13],
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"flags" => [2],
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"width" => [3, 6, 11, 14],
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"precision" => [4, 8, 12, 15],
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"name" => [5, 7, 9, 16],
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"more_flags" => [10]
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}
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match = regexp.match("%6.3f")
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match[:width].should == '6'
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match[:precision].should == '3'
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match[:type].should == 'f'
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match.to_a.should == [ "%6.3f", nil, "", "6", "3"] + [nil] * 8 + ["f"] + [nil] * 3
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end
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end
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