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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.chars)
end
it "has the correct LCS result on right-matches" do
expect(@callback.matched_b).to eq(hello.chars)
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
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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