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# frozen_string_literal: true
require 'spec_helper'
describe 'Diff::LCS Issues' do
include Diff::LCS::SpecHelper::Matchers
describe 'issue #1' do
shared_examples 'handles simple diffs' do |s1, s2, forward_diff|
before do
@diff_s1_s2 = Diff::LCS.diff(s1, s2)
end
it 'creates the correct diff' do
expect(change_diff(forward_diff)).to eq(@diff_s1_s2)
end
it 'creates the correct patch s1->s2' do
expect(Diff::LCS.patch(s1, @diff_s1_s2)).to eq(s2)
end
it 'creates the correct patch s2->s1' do
expect(Diff::LCS.patch(s2, @diff_s1_s2)).to eq(s1)
end
end
describe 'string' do
it_has_behavior 'handles simple diffs', 'aX', 'bXaX', [
[
['+', 0, 'b'],
['+', 1, 'X']
]
]
it_has_behavior 'handles simple diffs', 'bXaX', 'aX', [
[
['-', 0, 'b'],
['-', 1, 'X']
]
]
end
describe 'array' do
it_has_behavior 'handles simple diffs', %w(a X), %w(b X a X), [
[
['+', 0, 'b'],
['+', 1, 'X']
]
]
it_has_behavior 'handles simple diffs', %w(b X a X), %w(a X), [
[
['-', 0, 'b'],
['-', 1, 'X']
]
]
end
end
end
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