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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe 'Querying a Milestone' do
include GraphqlHelpers
let_it_be(:guest) { create(:user) }
let_it_be(:project) { create(:project) }
let_it_be(:milestone) { create(:milestone, project: project) }
let_it_be(:release_a) { create(:release, project: project) }
let_it_be(:release_b) { create(:release, project: project) }
before_all do
milestone.releases << [release_a, release_b]
project.add_guest(guest)
end
let(:expected_release_nodes) do
contain_exactly(a_graphql_entity_for(release_a), a_graphql_entity_for(release_b))
end
context 'when we post the query' do
let(:current_user) { nil }
let(:query) do
graphql_query_for('milestone', { id: milestone.to_global_id.to_s }, all_graphql_fields_for('Milestone'))
end
subject { graphql_data['milestone'] }
before do
post_graphql(query, current_user: current_user)
end
context 'when the user has access to the milestone' do
let(:current_user) { guest }
it_behaves_like 'a working graphql query'
it { is_expected.to include('title' => milestone.name) }
it 'contains release information' do
is_expected.to include('releases' => include('nodes' => expected_release_nodes))
end
end
context 'when the user does not have access to the milestone' do
it_behaves_like 'a working graphql query'
it { is_expected.to be_nil }
end
context 'when ID argument is missing' do
let(:query) do
graphql_query_for('milestone', {}, 'title')
end
it 'raises an exception' do
expect(graphql_errors).to include(a_hash_including('message' => "Field 'milestone' is missing required arguments: id"))
end
end
end
context 'when there are two milestones' do
let_it_be(:milestone_b) { create(:milestone, project: project) }
let(:current_user) { guest }
let(:milestone_fields) do
<<~GQL
fragment milestoneFields on Milestone {
#{all_graphql_fields_for('Milestone', max_depth: 1)}
releases { nodes { #{all_graphql_fields_for('Release', max_depth: 1)} } }
}
GQL
end
let(:single_query) do
<<~GQL
query ($id_a: MilestoneID!) {
a: milestone(id: $id_a) { ...milestoneFields }
}
#{milestone_fields}
GQL
end
let(:multi_query) do
<<~GQL
query ($id_a: MilestoneID!, $id_b: MilestoneID!) {
a: milestone(id: $id_a) { ...milestoneFields }
b: milestone(id: $id_b) { ...milestoneFields }
}
#{milestone_fields}
GQL
end
it 'produces correct results' do
r = run_with_clean_state(multi_query,
context: { current_user: current_user },
variables: {
id_a: global_id_of(milestone).to_s,
id_b: milestone_b.to_global_id.to_s
})
expect(r.to_h['errors']).to be_blank
expect(graphql_dig_at(r.to_h, :data, :a, :releases, :nodes)).to match expected_release_nodes
expect(graphql_dig_at(r.to_h, :data, :b, :releases, :nodes)).to be_empty
end
it 'does not suffer from N+1 performance issues' do
baseline = ActiveRecord::QueryRecorder.new do
run_with_clean_state(single_query,
context: { current_user: current_user },
variables: { id_a: milestone.to_global_id.to_s })
end
multi = ActiveRecord::QueryRecorder.new do
run_with_clean_state(multi_query,
context: { current_user: current_user },
variables: {
id_a: milestone.to_global_id.to_s,
id_b: milestone_b.to_global_id.to_s
})
end
expect(multi).not_to exceed_query_limit(baseline)
end
end
end
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