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require_relative '../../spec_helper'
describe "Regexp.linear_time?" do
it "returns true if matching can be done in linear time" do
Regexp.linear_time?(/a/).should == true
Regexp.linear_time?('a').should == true
end
it "returns true if matching can be done in linear time for a binary Regexp" do
Regexp.linear_time?(/[\x80-\xff]/n).should == true
end
it "return false if matching can't be done in linear time" do
Regexp.linear_time?(/(a)\1/).should == false
Regexp.linear_time?("(a)\\1").should == false
end
it "accepts flags for string argument" do
Regexp.linear_time?('a', Regexp::IGNORECASE).should == true
end
it "warns about flags being ignored for regexp arguments" do
-> {
Regexp.linear_time?(/a/, Regexp::IGNORECASE)
}.should complain(/warning: flags ignored/)
end
end
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