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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Diff::StatsCache, :use_clean_rails_memory_store_caching do
subject(:stats_cache) { described_class.new(cachable_key: cachable_key) }
let(:key) { ['diff_stats', cachable_key, described_class::VERSION].join(":") }
let(:cachable_key) { 'cachecachecache' }
let(:stat) { Gitaly::DiffStats.new(path: 'temp', additions: 10, deletions: 15) }
let(:stats) { Gitlab::Git::DiffStatsCollection.new([stat]) }
let(:cache) { Rails.cache }
describe '#read' do
before do
stats_cache.write_if_empty(stats)
end
it 'returns the expected stats' do
expect(stats_cache.read.to_json).to eq(stats.to_json)
end
end
describe '#write_if_empty' do
context 'when the cache already exists' do
before do
Rails.cache.write(key, true)
end
it 'does not write the stats' do
expect(cache).not_to receive(:write)
stats_cache.write_if_empty(stats)
end
end
context 'when the cache does not exist' do
it 'writes the stats' do
expect(cache)
.to receive(:write)
.with(key, stats.as_json, expires_in: described_class::EXPIRATION)
.and_call_original
stats_cache.write_if_empty(stats)
expect(stats_cache.read.to_a).to eq(stats.to_a)
end
context 'when given non utf-8 characters' do
let(:non_utf8_path) { '你好'.b }
let(:stat) { Gitaly::DiffStats.new(path: non_utf8_path, additions: 10, deletions: 15) }
it 'writes the stats' do
expect(cache)
.to receive(:write)
.with(key, stats.as_json, expires_in: described_class::EXPIRATION)
.and_call_original
stats_cache.write_if_empty(stats)
expect(stats_cache.read.to_a).to eq(stats.to_a)
end
end
context 'when given empty stats' do
let(:stats) { nil }
it 'does not write the stats' do
expect(cache).not_to receive(:write)
stats_cache.write_if_empty(stats)
end
end
end
end
describe '#clear' do
it 'clears cache' do
expect(cache).to receive(:delete).with(key)
stats_cache.clear
end
end
end
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