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Diffstat (limited to 'spec/ldiff_spec.rb')
-rw-r--r-- | spec/ldiff_spec.rb | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/spec/ldiff_spec.rb b/spec/ldiff_spec.rb new file mode 100644 index 0000000..ad1377f --- /dev/null +++ b/spec/ldiff_spec.rb @@ -0,0 +1,47 @@ +# -*- ruby encoding: utf-8 -*- + +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 { |hunk| hunk.each { |change| change[0] = '+' } } + 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 eq([]) + end + + it "returns an empty diff with (hello_ary, hello_ary)" do + expect(Diff::LCS.diff(hello_ary, hello_ary)).to eq([]) + end +end |