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# frozen_string_literal: true
require 'spec_helper'
describe 'Diff::LCS.traverse_sequences' do
describe 'callback with no finishers' do
describe 'over (seq1, seq2)' do
before(:each) do
@callback_s1_s2 = simple_callback_no_finishers
Diff::LCS.traverse_sequences(seq1, seq2, @callback_s1_s2)
@callback_s2_s1 = simple_callback_no_finishers
Diff::LCS.traverse_sequences(seq2, seq1, @callback_s2_s1)
end
it 'has the correct LCS result on left-matches' do
expect(@callback_s1_s2.matched_a).to eq(correct_lcs)
expect(@callback_s2_s1.matched_a).to eq(correct_lcs)
end
it 'has the correct LCS result on right-matches' do
expect(@callback_s1_s2.matched_b).to eq(correct_lcs)
expect(@callback_s2_s1.matched_b).to eq(correct_lcs)
end
it 'has the correct skipped sequences with the left sequence' do
expect(@callback_s1_s2.discards_a).to eq(skipped_seq1)
expect(@callback_s2_s1.discards_a).to eq(skipped_seq2)
end
it 'has the correct skipped sequences with the right sequence' do
expect(@callback_s1_s2.discards_b).to eq(skipped_seq2)
expect(@callback_s2_s1.discards_b).to eq(skipped_seq1)
end
it 'does not have anything done markers from the left or right sequences' do
expect(@callback_s1_s2.done_a).to be_empty
expect(@callback_s1_s2.done_b).to be_empty
expect(@callback_s2_s1.done_a).to be_empty
expect(@callback_s2_s1.done_b).to be_empty
end
end
describe 'over (hello, hello)' do
before(:each) do
@callback = simple_callback_no_finishers
Diff::LCS.traverse_sequences(hello, hello, @callback)
end
it 'has the correct LCS result on left-matches' do
expect(@callback.matched_a).to eq(hello.split(//))
end
it 'has the correct LCS result on right-matches' do
expect(@callback.matched_b).to eq(hello.split(//))
end
it 'has the correct skipped sequences with the left sequence', :only => true do
expect(@callback.discards_a).to be_empty
end
it 'has the correct skipped sequences with the right sequence' do
expect(@callback.discards_b).to be_empty
end
it 'does not have anything done markers from the left or right sequences' do
expect(@callback.done_a).to be_empty
expect(@callback.done_b).to be_empty
end
end
describe 'over (hello_ary, hello_ary)' do
before(:each) do
@callback = simple_callback_no_finishers
Diff::LCS.traverse_sequences(hello_ary, hello_ary, @callback)
end
it 'has the correct LCS result on left-matches' do
expect(@callback.matched_a).to eq(hello_ary)
end
it 'has the correct LCS result on right-matches' do
expect(@callback.matched_b).to eq(hello_ary)
end
it 'has the correct skipped sequences with the left sequence' do
expect(@callback.discards_a).to be_empty
end
it 'has the correct skipped sequences with the right sequence' do
expect(@callback.discards_b).to be_empty
end
it 'does not have anything done markers from the left or right sequences' do
expect(@callback.done_a).to be_empty
expect(@callback.done_b).to be_empty
end
end
end
describe 'callback with finisher' do
before(:each) do
@callback_s1_s2 = simple_callback
Diff::LCS.traverse_sequences(seq1, seq2, @callback_s1_s2)
@callback_s2_s1 = simple_callback
Diff::LCS.traverse_sequences(seq2, seq1, @callback_s2_s1)
end
it 'has the correct LCS result on left-matches' do
expect(@callback_s1_s2.matched_a).to eq(correct_lcs)
expect(@callback_s2_s1.matched_a).to eq(correct_lcs)
end
it 'has the correct LCS result on right-matches' do
expect(@callback_s1_s2.matched_b).to eq(correct_lcs)
expect(@callback_s2_s1.matched_b).to eq(correct_lcs)
end
it 'has the correct skipped sequences for the left sequence' do
expect(@callback_s1_s2.discards_a).to eq(skipped_seq1)
expect(@callback_s2_s1.discards_a).to eq(skipped_seq2)
end
it 'has the correct skipped sequences for the right sequence' do
expect(@callback_s1_s2.discards_b).to eq(skipped_seq2)
expect(@callback_s2_s1.discards_b).to eq(skipped_seq1)
end
it 'has done markers differently-sized sequences' do
expect(@callback_s1_s2.done_a).to eq([['p', 9, 't', 11]])
expect(@callback_s1_s2.done_b).to be_empty
expect(@callback_s2_s1.done_a).to be_empty
expect(@callback_s2_s1.done_b).to eq([['t', 11, 'p', 9]])
end
end
end
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