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require_relative '../../spec_helper'
describe "Regexp#named_captures" do
it "returns a Hash" do
/foo/.named_captures.should be_an_instance_of(Hash)
end
it "returns an empty Hash when there are no capture groups" do
/foo/.named_captures.should == {}
end
it "sets the keys of the Hash to the names of the capture groups" do
rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
rex.named_captures.keys.should == ['is','pat']
end
it "sets the values of the Hash to Arrays" do
rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
rex.named_captures.values.each do |value|
value.should be_an_instance_of(Array)
end
end
it "sets each element of the Array to the corresponding group's index" do
rex = /this (?<is>is) [aA] (?<pat>pate?rn)/
rex.named_captures['is'].should == [1]
rex.named_captures['pat'].should == [2]
end
it "works with duplicate capture group names" do
rex = /this (?<is>is) [aA] (?<pat>pate?(?<is>rn))/
rex.named_captures['is'].should == [1,3]
rex.named_captures['pat'].should == [2]
end
end
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