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# frozen_string_literal: true
require "spec_helper"
RSpec.describe API::Helpers::Caching do
subject(:instance) { Class.new.include(described_class).new }
describe "#present_cached" do
let_it_be(:project) { create(:project) }
let_it_be(:user) { create(:user) }
let(:presenter) { API::Entities::Todo }
let(:kwargs) do
{
with: presenter,
project: project
}
end
subject do
instance.present_cached(presentable, **kwargs)
end
before do
# We have to stub #body as it's a Grape method
# unavailable in the module by itself
expect(instance).to receive(:body) do |data|
data
end
allow(instance).to receive(:current_user) { user }
end
context "single object" do
let_it_be(:presentable) { create(:todo, project: project) }
it { is_expected.to be_a(Gitlab::Json::PrecompiledJson) }
it "uses the presenter" do
expect(presenter).to receive(:represent).with(presentable, project: project)
subject
end
it "is valid JSON" do
parsed = Gitlab::Json.parse(subject.to_s)
expect(parsed).to be_a(Hash)
expect(parsed["id"]).to eq(presentable.id)
end
it "fetches from the cache" do
expect(instance.cache).to receive(:fetch).with("#{presentable.cache_key}:#{user.cache_key}", expires_in: described_class::DEFAULT_EXPIRY).once
subject
end
context "when a cache context is supplied" do
before do
kwargs[:cache_context] = -> (todo) { todo.project.cache_key }
end
it "uses the context to augment the cache key" do
expect(instance.cache).to receive(:fetch).with("#{presentable.cache_key}:#{project.cache_key}", expires_in: described_class::DEFAULT_EXPIRY).once
subject
end
end
context "when expires_in is supplied" do
it "sets the expiry when accessing the cache" do
kwargs[:expires_in] = 7.days
expect(instance.cache).to receive(:fetch).with("#{presentable.cache_key}:#{user.cache_key}", expires_in: 7.days).once
subject
end
end
end
context "for a collection of objects" do
let_it_be(:presentable) { Array.new(5).map { create(:todo, project: project) } }
it { is_expected.to be_an(Gitlab::Json::PrecompiledJson) }
it "uses the presenter" do
presentable.each do |todo|
expect(presenter).to receive(:represent).with(todo, project: project)
end
subject
end
it "is valid JSON" do
parsed = Gitlab::Json.parse(subject.to_s)
expect(parsed).to be_an(Array)
presentable.each_with_index do |todo, i|
expect(parsed[i]["id"]).to eq(todo.id)
end
end
it "fetches from the cache" do
keys = presentable.map { |todo| "#{todo.cache_key}:#{user.cache_key}" }
expect(instance.cache).to receive(:fetch_multi).with(*keys, expires_in: described_class::DEFAULT_EXPIRY).once.and_call_original
subject
end
context "when a cache context is supplied" do
before do
kwargs[:cache_context] = -> (todo) { todo.project.cache_key }
end
it "uses the context to augment the cache key" do
keys = presentable.map { |todo| "#{todo.cache_key}:#{project.cache_key}" }
expect(instance.cache).to receive(:fetch_multi).with(*keys, expires_in: described_class::DEFAULT_EXPIRY).once.and_call_original
subject
end
end
context "expires_in is supplied" do
it "sets the expiry when accessing the cache" do
keys = presentable.map { |todo| "#{todo.cache_key}:#{user.cache_key}" }
kwargs[:expires_in] = 7.days
expect(instance.cache).to receive(:fetch_multi).with(*keys, expires_in: 7.days).once.and_call_original
subject
end
end
end
end
end
|
