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require 'spec_helper'
describe Banzai::ReferenceParser::BaseParser, lib: true do
include ReferenceParserHelpers
let(:user) { create(:user) }
let(:project) { create(:empty_project, :public) }
subject do
klass = Class.new(described_class) do
self.reference_type = :foo
end
klass.new(project, user)
end
describe '.reference_type=' do
it 'sets the reference type' do
dummy = Class.new(described_class)
dummy.reference_type = :foo
expect(dummy.reference_type).to eq(:foo)
end
end
describe '#nodes_visible_to_user' do
let(:link) { empty_html_link }
context 'when the link has a data-project attribute' do
it 'checks if user can read the resource' do
link['data-project'] = project.id.to_s
expect(subject).to receive(:can_read_reference?).with(user, project, link)
subject.nodes_visible_to_user(user, [link])
end
end
context 'when the link does not have a data-project attribute' do
it 'returns the nodes' do
expect(subject.nodes_visible_to_user(user, [link])).to eq([link])
end
end
end
describe '#nodes_user_can_reference' do
it 'returns the nodes' do
link = double(:link)
expect(subject.nodes_user_can_reference(user, [link])).to eq([link])
end
end
describe '#referenced_by' do
context 'when references_relation is implemented' do
it 'returns a collection of objects' do
links = Nokogiri::HTML.fragment("<a data-foo='#{user.id}'></a>").
children
expect(subject).to receive(:references_relation).and_return(User)
expect(subject.referenced_by(links)).to eq([user])
end
end
context 'when references_relation is not implemented' do
it 'raises NotImplementedError' do
links = Nokogiri::HTML.fragment('<a data-foo="1"></a>').children
expect { subject.referenced_by(links) }.
to raise_error(NotImplementedError)
end
end
end
describe '#references_relation' do
it 'raises NotImplementedError' do
expect { subject.references_relation }.to raise_error(NotImplementedError)
end
end
describe '#gather_attributes_per_project' do
it 'returns a Hash containing attribute values per project' do
link = Nokogiri::HTML.fragment('<a data-project="1" data-foo="2"></a>').
children[0]
hash = subject.gather_attributes_per_project([link], 'data-foo')
expect(hash).to be_an_instance_of(Hash)
expect(hash[1].to_a).to eq(['2'])
end
end
describe '#grouped_objects_for_nodes' do
it 'returns a Hash grouping objects per node' do
link = double(:link)
expect(link).to receive(:has_attribute?).
with('data-user').
and_return(true)
expect(link).to receive(:attr).
with('data-user').
and_return(user.id.to_s)
nodes = [link]
expect(subject).to receive(:unique_attribute_values).
with(nodes, 'data-user').
and_return([user.id.to_s])
hash = subject.grouped_objects_for_nodes(nodes, User, 'data-user')
expect(hash).to eq({ link => user })
end
it 'returns an empty Hash when entry does not exist in the database', :request_store do
link = double(:link)
expect(link).to receive(:has_attribute?).
with('data-user').
and_return(true)
expect(link).to receive(:attr).
with('data-user').
and_return('1')
nodes = [link]
bad_id = user.id + 100
expect(subject).to receive(:unique_attribute_values).
with(nodes, 'data-user').
and_return([bad_id.to_s])
hash = subject.grouped_objects_for_nodes(nodes, User, 'data-user')
expect(hash).to eq({})
end
end
describe '#unique_attribute_values' do
it 'returns an Array of unique values' do
link = double(:link)
expect(link).to receive(:has_attribute?).
with('data-foo').
twice.
and_return(true)
expect(link).to receive(:attr).
with('data-foo').
twice.
and_return('1')
nodes = [link, link]
expect(subject.unique_attribute_values(nodes, 'data-foo')).to eq(['1'])
end
end
describe '#process' do
it 'gathers the references for every node matching the reference type' do
dummy = Class.new(described_class) do
self.reference_type = :test
end
instance = dummy.new(project, user)
document = Nokogiri::HTML.fragment('<a class="gfm"></a><a class="gfm" data-reference-type="test"></a>')
expect(instance).to receive(:gather_references).
with([document.children[1]]).
and_return([user])
expect(instance.process([document])).to eq([user])
end
end
describe '#gather_references' do
let(:link) { double(:link) }
it 'does not process links a user can not reference' do
expect(subject).to receive(:nodes_user_can_reference).
with(user, [link]).
and_return([])
expect(subject).to receive(:referenced_by).with([])
subject.gather_references([link])
end
it 'does not process links a user can not see' do
expect(subject).to receive(:nodes_user_can_reference).
with(user, [link]).
and_return([link])
expect(subject).to receive(:nodes_visible_to_user).
with(user, [link]).
and_return([])
expect(subject).to receive(:referenced_by).with([])
subject.gather_references([link])
end
it 'returns the references if a user can reference and see a link' do
expect(subject).to receive(:nodes_user_can_reference).
with(user, [link]).
and_return([link])
expect(subject).to receive(:nodes_visible_to_user).
with(user, [link]).
and_return([link])
expect(subject).to receive(:referenced_by).with([link])
subject.gather_references([link])
end
end
describe '#can?' do
it 'delegates the permissions check to the Ability class' do
user = double(:user)
expect(Ability).to receive(:allowed?).
with(user, :read_project, project)
subject.can?(user, :read_project, project)
end
end
describe '#find_projects_for_hash_keys' do
it 'returns a list of Projects' do
expect(subject.find_projects_for_hash_keys(project.id => project)).
to eq([project])
end
end
describe '#collection_objects_for_ids' do
context 'with RequestStore disabled' do
it 'queries the collection directly' do
collection = User.all
expect(collection).to receive(:where).twice.and_call_original
2.times do
expect(subject.collection_objects_for_ids(collection, [user.id])).
to eq([user])
end
end
end
context 'with RequestStore enabled' do
before do
cache = Hash.new { |hash, key| hash[key] = {} }
allow(RequestStore).to receive(:active?).and_return(true)
allow(subject).to receive(:collection_cache).and_return(cache)
end
it 'queries the collection on the first call' do
expect(subject.collection_objects_for_ids(User, [user.id])).
to eq([user])
end
it 'does not query previously queried objects' do
collection = User.all
expect(collection).to receive(:where).once.and_call_original
2.times do
expect(subject.collection_objects_for_ids(collection, [user.id])).
to eq([user])
end
end
it 'casts String based IDs to Fixnums before querying objects' do
2.times do
expect(subject.collection_objects_for_ids(User, [user.id.to_s])).
to eq([user])
end
end
it 'queries any additional objects after the first call' do
other_user = create(:user)
expect(subject.collection_objects_for_ids(User, [user.id])).
to eq([user])
expect(subject.collection_objects_for_ids(User, [user.id, other_user.id])).
to eq([user, other_user])
end
it 'caches objects on a per collection class basis' do
expect(subject.collection_objects_for_ids(User, [user.id])).
to eq([user])
expect(subject.collection_objects_for_ids(Project, [project.id])).
to eq([project])
end
end
end
describe '#collection_cache_key' do
it 'returns the cache key for a Class' do
expect(subject.collection_cache_key(Project)).to eq(Project)
end
it 'returns the cache key for an ActiveRecord::Relation' do
expect(subject.collection_cache_key(Project.all)).to eq(Project)
end
end
end
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