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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe('Expression::Base#clone') do
specify('Base#clone') do
root = RP.parse(/^(?i:a)b+$/i)
copy = root.clone
expect(copy.to_s).to eq root.to_s
expect(root).not_to equal copy
expect(root.text).to eq copy.text
expect(root.text).not_to equal copy.text
root_1 = root[1]
copy_1 = copy[1]
expect(root_1.options).to eq copy_1.options
expect(root_1.options).not_to equal copy_1.options
expect(root_1.parent).to eq root
expect(root_1.parent).not_to equal copy
expect(copy_1.parent).to eq copy
expect(copy_1.parent).not_to equal root
root_2 = root[2]
copy_2 = copy[2]
expect(root_2).to be_quantified
expect(copy_2).to be_quantified
expect(root_2.quantifier.text).to eq copy_2.quantifier.text
expect(root_2.quantifier.text).not_to equal copy_2.quantifier.text
expect(root_2.quantifier).not_to equal copy_2.quantifier
# regression test
expect { root_2.clone }.not_to(change { root_2.quantifier.object_id })
expect { root_2.clone }.not_to(change { root_2.quantifier.text.object_id })
end
specify('Base#clone causes no shared state') do
root = RP.parse(regexp_with_all_features)
copy = root.clone
shared = Leto.shared_mutables(root, copy)
expect(shared).to be_empty, "found shared mutables:\n#{shared.join("\n")}"
end
specify('Subexpression#clone') do
root = RP.parse(/^a(b([cde])f)g$/)
copy = root.clone
expect(copy.to_s).to eq root.to_s
expect(root).to respond_to(:expressions)
expect(copy).to respond_to(:expressions)
expect(root.expressions).not_to equal copy.expressions
copy.expressions.each_with_index do |exp, index|
expect(root[index]).not_to equal exp
end
copy[2].each_with_index do |exp, index|
expect(root[2][index]).not_to equal exp
end
# regression test
expect { root.clone }.not_to(change { root.expressions.object_id })
end
specify('Group::Named#clone') do
root = RP.parse('^(?<somename>a)+bc$')
copy = root.clone
expect(copy.to_s).to eq root.to_s
root_1 = root[1]
copy_1 = copy[1]
expect(root_1.name).to eq copy_1.name
expect(root_1.name).not_to equal copy_1.name
expect(root_1.text).to eq copy_1.text
expect(root_1.expressions).not_to equal copy_1.expressions
copy_1.expressions.each_with_index do |exp, index|
expect(root_1[index]).not_to equal exp
end
# regression test
expect { root_1.clone }.not_to(change { root_1.name.object_id })
end
specify('Group::Options#clone') do
root = RP.parse('foo(?i)bar')
copy = root.clone
expect(copy.to_s).to eq root.to_s
root_1 = root[1]
copy_1 = copy[1]
expect(root_1.option_changes).to eq copy_1.option_changes
expect(root_1.option_changes).not_to equal copy_1.option_changes
# regression test
expect { root_1.clone }.not_to(change { root_1.option_changes.object_id })
end
specify('Backreference::Base#clone') do
root = RP.parse('(foo)\1')
copy = root.clone
expect(copy.to_s).to eq root.to_s
root_1 = root[1]
copy_1 = copy[1]
expect(root_1.referenced_expression).to eq copy_1.referenced_expression
expect(root_1.referenced_expression.to_s).to eq copy_1.referenced_expression.to_s
expect(root_1.referenced_expression).not_to equal copy_1.referenced_expression
# regression test
expect { root_1.clone }.not_to(change { root_1.referenced_expression.object_id })
end
specify('Backreference::Base#clone works for recursive subexp calls') do
root = RP.parse('a|b\g<0>')
copy = root.clone
expect(copy.to_s).to eq root.to_s
root_call = root.dig(0, 1, 1)
copy_call = copy.dig(0, 1, 1)
expect(root).to eq copy
expect(root).not_to equal copy
expect(root_call).to eq copy_call
expect(root_call).not_to equal copy_call
expect(root_call.referenced_expression).not_to be_nil
expect(root_call.referenced_expression.object_id).to eq root.object_id
expect(copy_call.referenced_expression).not_to be_nil
# Mapping the reference to the cloned referenced_expression would
# probably require a context or 2-way bindings in the tree. Maybe later ...
# expect(copy_call.referenced_expression.object_id).to eq copy.object_id
end
specify('Sequence#clone') do
root = RP.parse(/(a|b)/)
copy = root.clone
# regression test
expect(copy.to_s).to eq root.to_s
root_seq_op = root[0][0]
copy_seq_op = copy[0][0]
root_seq_1 = root[0][0][0]
copy_seq_1 = copy[0][0][0]
expect(root_seq_op).not_to equal copy_seq_op
expect(root_seq_1).not_to equal copy_seq_1
copy_seq_1.expressions.each_with_index do |exp, index|
expect(root_seq_1[index]).not_to equal exp
end
end
describe('Base#unquantified_clone') do
it 'produces a clone' do
root = RP.parse(/^a(b([cde])f)g$/)
copy = root.unquantified_clone
expect(copy.to_s).to eq root.to_s
expect(copy).not_to equal root
end
it 'does not carry over the callee quantifier' do
expect(RP.parse(/a{3}/)[0]).to be_quantified
expect(RP.parse(/a{3}/)[0].unquantified_clone).not_to be_quantified
expect(RP.parse(/[a]{3}/)[0]).to be_quantified
expect(RP.parse(/[a]{3}/)[0].unquantified_clone).not_to be_quantified
expect(RP.parse(/(a|b){3}/)[0]).to be_quantified
expect(RP.parse(/(a|b){3}/)[0].unquantified_clone).not_to be_quantified
end
it 'keeps quantifiers of callee children' do
expect(RP.parse(/(a{3}){3}/)[0][0]).to be_quantified
expect(RP.parse(/(a{3}){3}/)[0].unquantified_clone[0]).to be_quantified
end
end
end
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