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require 'spec_helper'
describe Gitlab::Ci::Pipeline::Expression::Lexeme::Pattern do
describe '.build' do
it 'creates a new instance of the token' do
expect(described_class.build('/.*/'))
.to be_a(described_class)
end
it 'raises an error if pattern is invalid' do
expect { described_class.build('/ some ( thin/i') }
.to raise_error(Gitlab::Ci::Pipeline::Expression::Lexer::SyntaxError)
end
end
describe '.type' do
it 'is a value lexeme' do
expect(described_class.type).to eq :value
end
end
describe '.scan' do
it 'correctly identifies a pattern token' do
scanner = StringScanner.new('/pattern/')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('pattern')
end
it 'does not allow to use an empty pattern' do
scanner = StringScanner.new(%(//))
token = described_class.scan(scanner)
expect(token).to be_nil
end
it 'support single flag' do
scanner = StringScanner.new('/pattern/i')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('(?i)pattern')
end
it 'support multiple flags' do
scanner = StringScanner.new('/pattern/im')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('(?im)pattern')
end
it 'ignores unsupported flags' do
scanner = StringScanner.new('/pattern/x')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('pattern')
end
it 'is a eager scanner for regexp boundaries' do
scanner = StringScanner.new('/some .* / pattern/')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('some .* ')
end
it 'does not match on escaped regexp boundaries' do
scanner = StringScanner.new('/some .* \/ pattern/')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('some .* / pattern')
end
it 'recognizes \ as an escape character for /' do
scanner = StringScanner.new('/some numeric \/$ pattern/')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('some numeric /$ pattern')
end
it 'does not recognize \ as an escape character for $' do
scanner = StringScanner.new('/some numeric \$ pattern/')
token = described_class.scan(scanner)
expect(token).not_to be_nil
expect(token.build.evaluate)
.to eq Gitlab::UntrustedRegexp.new('some numeric \$ pattern')
end
end
describe '#evaluate' do
it 'returns a regular expression' do
regexp = described_class.new('/abc/')
expect(regexp.evaluate).to eq Gitlab::UntrustedRegexp.new('abc')
end
it 'raises error if evaluated regexp is not valid' do
allow(Gitlab::UntrustedRegexp::RubySyntax).to receive(:valid?).and_return(true)
regexp = described_class.new('/invalid ( .*/')
expect { regexp.evaluate }
.to raise_error(Gitlab::Ci::Pipeline::Expression::RuntimeError)
end
end
end
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