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# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::RepositoryCacheAdapter do
let(:project) { create(:project, :repository) }
let(:repository) { project.repository }
let(:cache) { repository.send(:cache) }
let(:redis_set_cache) { repository.send(:redis_set_cache) }
describe '#cache_method_output', :use_clean_rails_memory_store_caching do
let(:fallback) { 10 }
context 'with a non-existing repository' do
let(:project) { create(:project) } # No repository
subject do
repository.cache_method_output(:cats, fallback: fallback) do
repository.cats_call_stub
end
end
it 'returns the fallback value' do
expect(subject).to eq(fallback)
end
it 'avoids calling the original method' do
expect(repository).not_to receive(:cats_call_stub)
subject
end
end
context 'with a method throwing a non-existing-repository error' do
subject do
repository.cache_method_output(:cats, fallback: fallback) do
raise Gitlab::Git::Repository::NoRepository
end
end
it 'returns the fallback value' do
expect(subject).to eq(fallback)
end
it 'does not cache the data' do
subject
expect(repository.instance_variable_defined?(:@cats)).to eq(false)
expect(cache.exist?(:cats)).to eq(false)
end
end
context 'with an existing repository' do
it 'caches the output' do
object = double
expect(object).to receive(:number).once.and_return(10)
2.times do
val = repository.cache_method_output(:cats) { object.number }
expect(val).to eq(10)
end
expect(repository.send(:cache).exist?(:cats)).to eq(true)
expect(repository.instance_variable_get(:@cats)).to eq(10)
end
end
end
describe '#cache_method_output_asymmetrically', :use_clean_rails_memory_store_caching, :request_store do
let(:request_store_cache) { repository.send(:request_store_cache) }
context 'with a non-existing repository' do
let(:project) { create(:project) } # No repository
let(:object) { double }
subject do
repository.cache_method_output_asymmetrically(:cats) do
object.cats_call_stub
end
end
it 'returns the output of the original method' do
expect(object).to receive(:cats_call_stub).and_return('output')
expect(subject).to eq('output')
end
end
context 'with a method throwing a non-existing-repository error' do
subject do
repository.cache_method_output_asymmetrically(:cats) do
raise Gitlab::Git::Repository::NoRepository
end
end
it 'returns nil' do
expect(subject).to eq(nil)
end
it 'does not cache the data' do
subject
expect(repository.instance_variable_defined?(:@cats)).to eq(false)
expect(cache.exist?(:cats)).to eq(false)
end
end
context 'with an existing repository' do
let(:object) { double }
context 'when it returns truthy' do
before do
expect(object).to receive(:cats).once.and_return('truthy output')
end
it 'caches the output in RequestStore' do
expect do
repository.cache_method_output_asymmetrically(:cats) { object.cats }
end.to change { request_store_cache.read(:cats) }.from(nil).to('truthy output')
end
it 'caches the output in RepositoryCache' do
expect do
repository.cache_method_output_asymmetrically(:cats) { object.cats }
end.to change { cache.read(:cats) }.from(nil).to('truthy output')
end
end
context 'when it returns false' do
before do
expect(object).to receive(:cats).once.and_return(false)
end
it 'caches the output in RequestStore' do
expect do
repository.cache_method_output_asymmetrically(:cats) { object.cats }
end.to change { request_store_cache.read(:cats) }.from(nil).to(false)
end
it 'does NOT cache the output in RepositoryCache' do
expect do
repository.cache_method_output_asymmetrically(:cats) { object.cats }
end.not_to change { cache.read(:cats) }.from(nil)
end
end
end
end
describe '#memoize_method_output' do
let(:fallback) { 10 }
context 'with a non-existing repository' do
let(:project) { create(:project) } # No repository
subject do
repository.memoize_method_output(:cats, fallback: fallback) do
repository.cats_call_stub
end
end
it 'returns the fallback value' do
expect(subject).to eq(fallback)
end
it 'avoids calling the original method' do
expect(repository).not_to receive(:cats_call_stub)
subject
end
it 'does not set the instance variable' do
subject
expect(repository.instance_variable_defined?(:@cats)).to eq(false)
end
end
context 'with a method throwing a non-existing-repository error' do
subject do
repository.memoize_method_output(:cats, fallback: fallback) do
raise Gitlab::Git::Repository::NoRepository
end
end
it 'returns the fallback value' do
expect(subject).to eq(fallback)
end
it 'does not set the instance variable' do
subject
expect(repository.instance_variable_defined?(:@cats)).to eq(false)
end
end
context 'with an existing repository' do
it 'sets the instance variable' do
repository.memoize_method_output(:cats, fallback: fallback) do
'block output'
end
expect(repository.instance_variable_get(:@cats)).to eq('block output')
end
end
end
describe '#expire_method_caches' do
it 'expires the caches of the given methods' do
expect(cache).to receive(:expire).with(:rendered_readme)
expect(cache).to receive(:expire).with(:branch_names)
expect(redis_set_cache).to receive(:expire).with(:rendered_readme)
expect(redis_set_cache).to receive(:expire).with(:branch_names)
repository.expire_method_caches(%i(rendered_readme branch_names))
end
it 'does not expire caches for non-existent methods' do
expect(cache).not_to receive(:expire).with(:nonexistent)
expect(Rails.logger).to(
receive(:error).with("Requested to expire non-existent method 'nonexistent' for Repository"))
repository.expire_method_caches(%i(nonexistent))
end
end
end
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