77 lines
1.9 KiB
Ruby
77 lines
1.9 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'fast_spec_helper'
|
|
require 'diff_match_patch'
|
|
|
|
RSpec.describe Gitlab::Diff::CharDiff do
|
|
let(:old_string) { "Helo \n Worlld" }
|
|
let(:new_string) { "Hello \n World" }
|
|
|
|
subject(:diff) { described_class.new(old_string, new_string) }
|
|
|
|
describe '#generate_diff' do
|
|
context 'when old string is nil' do
|
|
let(:old_string) { nil }
|
|
|
|
it 'does not raise an error' do
|
|
expect { subject.generate_diff }.not_to raise_error
|
|
end
|
|
|
|
it 'treats nil values as blank strings' do
|
|
changes = subject.generate_diff
|
|
|
|
expect(changes).to eq([
|
|
[:insert, "Hello \n World"]
|
|
])
|
|
end
|
|
end
|
|
|
|
it 'generates an array of changes' do
|
|
changes = subject.generate_diff
|
|
|
|
expect(changes).to eq([
|
|
[:equal, "Hel"],
|
|
[:insert, "l"],
|
|
[:equal, "o \n Worl"],
|
|
[:delete, "l"],
|
|
[:equal, "d"]
|
|
])
|
|
end
|
|
end
|
|
|
|
describe '#changed_ranges' do
|
|
subject { diff.changed_ranges }
|
|
|
|
context 'when old string is nil' do
|
|
let(:old_string) { nil }
|
|
|
|
it 'returns lists of changes' do
|
|
old_diffs, new_diffs = subject
|
|
|
|
expect(old_diffs).to eq([])
|
|
expect(new_diffs).to eq([Gitlab::MarkerRange.new(0, 12, mode: :addition)])
|
|
end
|
|
end
|
|
|
|
it 'returns ranges of changes' do
|
|
old_diffs, new_diffs = subject
|
|
|
|
expect(old_diffs).to eq([Gitlab::MarkerRange.new(11, 11, mode: :deletion)])
|
|
expect(new_diffs).to eq([Gitlab::MarkerRange.new(3, 3, mode: :addition)])
|
|
end
|
|
end
|
|
|
|
describe '#to_html' do
|
|
it 'returns an HTML representation of the diff' do
|
|
subject.generate_diff
|
|
|
|
expect(subject.to_html).to eq(
|
|
'<span class="idiff">Hel</span>' \
|
|
'<span class="idiff addition">l</span>' \
|
|
"<span class=\"idiff\">o \n Worl</span>" \
|
|
'<span class="idiff deletion">l</span>' \
|
|
'<span class="idiff">d</span>'
|
|
)
|
|
end
|
|
end
|
|
end
|