110 lines
2.8 KiB
Ruby
110 lines
2.8 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Diff::StatsCache, :use_clean_rails_memory_store_caching do
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subject(:stats_cache) { described_class.new(cachable_key: cachable_key) }
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let(:key) { ['diff_stats', cachable_key, described_class::VERSION].join(":") }
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let(:cachable_key) { 'cachecachecache' }
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let(:stat) { Gitaly::DiffStats.new(path: 'temp', additions: 10, deletions: 15) }
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let(:stats) { Gitlab::Git::DiffStatsCollection.new([stat]) }
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let(:serialized_stats) { stats.map(&:to_h).as_json }
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let(:cache) { Rails.cache }
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describe '#read' do
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before do
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stats_cache.write_if_empty(stats)
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end
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it 'returns the expected stats' do
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expect(stats_cache.read.to_json).to eq(stats.to_json)
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end
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end
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describe '#write_if_empty' do
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context 'when the cache already exists' do
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before do
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Rails.cache.write(key, true)
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end
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it 'does not write the stats' do
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expect(cache).not_to receive(:write)
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stats_cache.write_if_empty(stats)
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end
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end
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context 'when the cache does not exist' do
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it 'writes the stats' do
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expect(cache)
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.to receive(:write)
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.with(key, serialized_stats, expires_in: described_class::EXPIRATION)
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.and_call_original
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stats_cache.write_if_empty(stats)
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expect(stats_cache.read.to_a).to eq(stats.to_a)
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end
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context 'when given non utf-8 characters' do
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let(:non_utf8_path) { '你好'.b }
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let(:stat) { Gitaly::DiffStats.new(path: non_utf8_path, additions: 10, deletions: 15) }
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it 'writes the stats' do
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expect(cache)
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.to receive(:write)
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.with(key, serialized_stats, expires_in: described_class::EXPIRATION)
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.and_call_original
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stats_cache.write_if_empty(stats)
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expect(stats_cache.read.to_a).to eq(stats.to_a)
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end
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end
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context 'when given empty stats' do
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let(:stats) { nil }
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it 'does not write the stats' do
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expect(cache).not_to receive(:write)
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stats_cache.write_if_empty(stats)
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end
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end
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end
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end
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describe '#clear' do
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it 'clears cache' do
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expect(cache).to receive(:delete).with(key)
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stats_cache.clear
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end
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end
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it 'VERSION is set' do
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expect(described_class::VERSION).to be_present
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end
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context 'with multiple cache versions' do
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before do
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stats_cache.write_if_empty(stats)
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end
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it 'does not read from a stale cache' do
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expect(stats_cache.read.to_json).to eq(stats.to_json)
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stub_const('Gitlab::Diff::StatsCache::VERSION', '1.0.new-new-thing')
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stats_cache = described_class.new(cachable_key: cachable_key)
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expect(stats_cache.read).to be_nil
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stats_cache.write_if_empty(stats)
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expect(stats_cache.read.to_json).to eq(stats.to_json)
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end
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end
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end
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