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Contents
# frozen_string_literal: true
require "spec_helper"
describe Diff::LCS, ".diff" do
include Diff::LCS::SpecHelper::Matchers
it "correctly diffs seq1 to seq2" do
diff_s1_s2 = Diff::LCS.diff(seq1, seq2)
expect(change_diff(correct_forward_diff)).to eq(diff_s1_s2)
end
it "correctly diffs seq2 to seq1" do
diff_s2_s1 = Diff::LCS.diff(seq2, seq1)
expect(change_diff(correct_backward_diff)).to eq(diff_s2_s1)
end
it "correctly diffs against an empty sequence" do
diff = Diff::LCS.diff(word_sequence, [])
correct_diff = [
[
["-", 0, "abcd"],
["-", 1, "efgh"],
["-", 2, "ijkl"],
["-", 3, "mnopqrstuvwxyz"]
]
]
expect(change_diff(correct_diff)).to eq(diff)
diff = Diff::LCS.diff([], word_sequence)
correct_diff.each do |hunk|
hunk.each { |change| change[0] = "+" }
end
expect(change_diff(correct_diff)).to eq(diff)
end
it "correctly diffs 'xx' and 'xaxb'" do
left = "xx"
right = "xaxb"
expect(Diff::LCS.patch(left, Diff::LCS.diff(left, right))).to eq(right)
end
it "returns an empty diff with (hello, hello)" do
expect(Diff::LCS.diff(hello, hello)).to be_empty
end
it "returns an empty diff with (hello_ary, hello_ary)" do
expect(Diff::LCS.diff(hello_ary, hello_ary)).to be_empty
end
end
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