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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe 'getting merge request listings nested in a project' do
include GraphqlHelpers
let_it_be(:project) { create(:project, :repository, :public) }
let_it_be(:current_user) { create(:user) }
let_it_be(:label) { create(:label, project: project) }
let_it_be(:merge_request_a) do
create(:labeled_merge_request, :unique_branches, source_project: project, labels: [label])
end
let_it_be(:merge_request_b) do
create(:merge_request, :closed, :unique_branches, source_project: project)
end
let_it_be(:merge_request_c) do
create(:labeled_merge_request, :closed, :unique_branches, source_project: project, labels: [label])
end
let_it_be(:merge_request_d) do
create(:merge_request, :locked, :unique_branches, source_project: project)
end
let_it_be(:merge_request_e) do
create(:merge_request, :unique_branches, source_project: project)
end
let(:results) { graphql_data.dig('project', 'mergeRequests', 'nodes') }
let(:search_params) { nil }
def query_merge_requests(fields)
graphql_query_for(
:project,
{ full_path: project.full_path },
query_nodes(:merge_requests, fields, args: search_params)
)
end
it_behaves_like 'a working graphql query' do
let(:query) do
query_merge_requests(all_graphql_fields_for('MergeRequest', max_depth: 2))
end
before do
# We cannot call the whitelist here, since the transaction does not
# begin until we enter the controller.
headers = {
'X-GITLAB-QUERY-WHITELIST-ISSUE' => 'https://gitlab.com/gitlab-org/gitlab/-/issues/322979'
}
post_graphql(query, current_user: current_user, headers: headers)
end
end
# The following tests are needed to guarantee that we have correctly annotated
# all the gitaly calls. Selecting combinations of fields may mask this due to
# memoization.
context 'when requesting a single field' do
let_it_be(:fresh_mr) { create(:merge_request, :unique_branches, source_project: project) }
let(:search_params) { { iids: [fresh_mr.iid.to_s] } }
let(:graphql_data) do
GitlabSchema.execute(query, context: { current_user: current_user }).to_h['data']
end
before do
project.repository.expire_branches_cache
end
context 'when selecting any single scalar field' do
where(:field) do
scalar_fields_of('MergeRequest').map { |name| [name] }
end
with_them do
let(:query) do
query_merge_requests([:iid, field].uniq)
end
it 'selects the correct MR' do
expect(results).to contain_exactly(a_hash_including('iid' => fresh_mr.iid.to_s))
end
end
end
context 'when selecting any single nested field' do
where(:field, :subfield, :is_connection) do
nested_fields_of('MergeRequest').flat_map do |name, field|
type = field_type(field)
is_connection = type.name.ends_with?('Connection')
type = field_type(type.fields['nodes']) if is_connection
type.fields
.select { |_, field| !nested_fields?(field) && !required_arguments?(field) }
.map(&:first)
.map { |subfield| [name, subfield, is_connection] }
end
end
with_them do
let(:query) do
fld = is_connection ? query_graphql_field(:nodes, nil, [subfield]) : subfield
query_merge_requests([:iid, query_graphql_field(field, nil, [fld])])
end
it 'selects the correct MR' do
expect(results).to contain_exactly(a_hash_including('iid' => fresh_mr.iid.to_s))
end
end
end
end
shared_examples 'when searching with parameters' do
let(:query) do
query_merge_requests('iid title')
end
let(:expected) do
mrs.map { |mr| a_hash_including('iid' => mr.iid.to_s, 'title' => mr.title) }
end
it 'finds the right mrs' do
post_graphql(query, current_user: current_user)
expect(results).to match_array(expected)
end
end
context 'when there are no search params' do
let(:search_params) { nil }
let(:mrs) { [merge_request_a, merge_request_b, merge_request_c, merge_request_d, merge_request_e] }
it_behaves_like 'when searching with parameters'
end
context 'when the search params do not match anything' do
let(:search_params) { { iids: %w[foo bar baz] } }
let(:mrs) { [] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by iids' do
let(:search_params) { { iids: mrs.map(&:iid).map(&:to_s) } }
let(:mrs) { [merge_request_a, merge_request_c] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by state' do
let(:search_params) { { state: :closed } }
let(:mrs) { [merge_request_b, merge_request_c] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by source_branch' do
let(:search_params) { { source_branches: mrs.map(&:source_branch) } }
let(:mrs) { [merge_request_b, merge_request_c] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by target_branch' do
let(:search_params) { { target_branches: mrs.map(&:target_branch) } }
let(:mrs) { [merge_request_a, merge_request_d] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by label' do
let(:search_params) { { labels: [label.title] } }
let(:mrs) { [merge_request_a, merge_request_c] }
it_behaves_like 'when searching with parameters'
end
context 'when searching by combination' do
let(:search_params) { { state: :closed, labels: [label.title] } }
let(:mrs) { [merge_request_c] }
it_behaves_like 'when searching with parameters'
end
context 'when requesting `approved_by`' do
let(:search_params) { { iids: [merge_request_a.iid.to_s, merge_request_b.iid.to_s] } }
let(:extra_iid_for_second_query) { merge_request_c.iid.to_s }
let(:requested_fields) { query_graphql_field(:approved_by, nil, query_graphql_field(:nodes, nil, [:username])) }
def execute_query
query = query_merge_requests(requested_fields)
post_graphql(query, current_user: current_user)
end
it 'exposes approver username' do
merge_request_a.approved_by_users << current_user
execute_query
user_data = { 'username' => current_user.username }
expect(results).to include(a_hash_including('approvedBy' => { 'nodes' => array_including(user_data) }))
end
include_examples 'N+1 query check'
end
describe 'fields' do
let(:requested_fields) { nil }
let(:extra_iid_for_second_query) { merge_request_c.iid.to_s }
let(:search_params) { { iids: [merge_request_a.iid.to_s, merge_request_b.iid.to_s] } }
def execute_query
query = query_merge_requests(requested_fields)
post_graphql(query, current_user: current_user)
end
context 'when requesting `commit_count`' do
let(:merge_request_with_commits) { create(:merge_request, source_project: project) }
let(:search_params) { { iids: [merge_request_a.iid.to_s, merge_request_with_commits.iid.to_s] } }
let(:requested_fields) { [:iid, :commit_count] }
it 'exposes `commit_count`' do
execute_query
expect(results).to match_array [
{ "iid" => merge_request_a.iid.to_s, "commitCount" => 0 },
{ "iid" => merge_request_with_commits.iid.to_s, "commitCount" => 29 }
]
end
end
context 'when requesting `merged_at`' do
let(:requested_fields) { [:merged_at] }
before do
# make the MRs "merged"
[merge_request_a, merge_request_b, merge_request_c].each do |mr|
mr.update!(state_id: MergeRequest.available_states[:merged])
mr.metrics.update!(merged_at: Time.now)
end
end
include_examples 'N+1 query check'
end
context 'when requesting `user_notes_count`' do
let(:requested_fields) { [:user_notes_count] }
before do
create_list(:note_on_merge_request, 2, noteable: merge_request_a, project: project)
create(:note_on_merge_request, noteable: merge_request_c, project: project)
end
include_examples 'N+1 query check'
end
context 'when requesting `user_discussions_count`' do
let(:requested_fields) { [:user_discussions_count] }
before do
create_list(:note_on_merge_request, 2, noteable: merge_request_a, project: project)
create(:note_on_merge_request, noteable: merge_request_c, project: project)
end
include_examples 'N+1 query check'
end
context 'when requesting reviewers' do
let(:requested_fields) { ['reviewers { nodes { username } }'] }
before do
merge_request_a.reviewers << create(:user)
merge_request_a.reviewers << create(:user)
merge_request_c.reviewers << create(:user)
end
it 'returns the reviewers' do
nodes = merge_request_a.reviewers.map { |r| { 'username' => r.username } }
reviewers = { 'nodes' => match_array(nodes) }
execute_query
expect(results).to include a_hash_including('reviewers' => match(reviewers))
end
include_examples 'N+1 query check'
end
end
describe 'performance' do
let(:mr_fields) do
<<~SELECT
assignees { nodes { username } }
reviewers { nodes { username } }
participants { nodes { username } }
headPipeline { status }
SELECT
end
let(:query) do
<<~GQL
query($first: Int) {
project(fullPath: "#{project.full_path}") {
mergeRequests(first: $first) {
nodes { #{mr_fields} }
}
}
}
GQL
end
before_all do
project.add_developer(current_user)
mrs = create_list(:merge_request, 10, :closed, :with_head_pipeline,
source_project: project,
author: current_user)
mrs.each do |mr|
mr.assignees << create(:user)
mr.assignees << current_user
mr.reviewers << create(:user)
mr.reviewers << current_user
end
end
before do
# Confounding factor: makes DB calls in EE
allow(Gitlab::Database).to receive(:read_only?).and_return(false)
end
def query_context
{ current_user: current_user }
end
def run_query(number)
# Ensure that we have a fresh request store and batch-context between runs
vars = { first: number }
result = run_with_clean_state(query, context: query_context, variables: vars)
graphql_dig_at(result.to_h, :data, :project, :merge_requests, :nodes)
end
def user_collection
{ 'nodes' => all(match(a_hash_including('username' => be_present))) }
end
it 'returns appropriate results' do
mrs = run_query(2)
expect(mrs.size).to eq(2)
expect(mrs).to all(
match(
a_hash_including(
'assignees' => user_collection,
'reviewers' => user_collection,
'participants' => user_collection,
'headPipeline' => { 'status' => be_present }
)))
end
it 'can lookahead to eliminate N+1 queries' do
baseline = ActiveRecord::QueryRecorder.new { run_query(1) }
expect { run_query(10) }.not_to exceed_query_limit(baseline)
end
end
describe 'sorting and pagination' do
let(:data_path) { [:project, :mergeRequests] }
def pagination_query(params)
graphql_query_for(:project, { full_path: project.full_path }, <<~QUERY)
mergeRequests(#{params}) {
#{page_info} nodes { id }
}
QUERY
end
context 'when sorting by merged_at DESC' do
let(:sort_param) { :MERGED_AT_DESC }
let(:expected_results) do
[
merge_request_b,
merge_request_d,
merge_request_c,
merge_request_e,
merge_request_a
].map { |mr| global_id_of(mr) }
end
before do
five_days_ago = 5.days.ago
merge_request_d.metrics.update!(merged_at: five_days_ago)
# same merged_at, the second order column will decide (merge_request.id)
merge_request_c.metrics.update!(merged_at: five_days_ago)
merge_request_b.metrics.update!(merged_at: 1.day.ago)
end
it_behaves_like 'sorted paginated query' do
let(:first_param) { 2 }
end
context 'when last parameter is given' do
let(:params) { graphql_args(sort: sort_param, last: 2) }
let(:page_info) { nil }
it 'takes the last 2 records' do
query = pagination_query(params)
post_graphql(query, current_user: current_user)
expect(results.map { |item| item["id"] }).to eq(expected_results.last(2))
end
end
end
end
context 'when only the count is requested' do
context 'when merged at filter is present' do
let_it_be(:merge_request) do
create(:merge_request, :unique_branches, source_project: project).tap do |mr|
mr.metrics.update!(merged_at: Time.new(2020, 1, 3))
end
end
let(:query) do
# Note: __typename meta field is always requested by the FE
graphql_query_for(:project, { full_path: project.full_path }, <<~QUERY)
mergeRequests(mergedAfter: "2020-01-01", mergedBefore: "2020-01-05", first: 0, sourceBranches: null, labels: null) {
count
__typename
}
QUERY
end
it 'does not query the merge requests table for the count' do
query_recorder = ActiveRecord::QueryRecorder.new { post_graphql(query, current_user: current_user) }
queries = query_recorder.data.each_value.first[:occurrences]
expect(queries).not_to include(match(/SELECT COUNT\(\*\) FROM "merge_requests"/))
expect(queries).to include(match(/SELECT COUNT\(\*\) FROM "merge_request_metrics"/))
end
context 'when total_time_to_merge and count is queried' do
let(:query) do
graphql_query_for(:project, { full_path: project.full_path }, <<~QUERY)
mergeRequests(mergedAfter: "2020-01-01", mergedBefore: "2020-01-05", first: 0) {
totalTimeToMerge
count
}
QUERY
end
it 'does not query the merge requests table for the total_time_to_merge' do
query_recorder = ActiveRecord::QueryRecorder.new { post_graphql(query, current_user: current_user) }
queries = query_recorder.data.each_value.first[:occurrences]
expect(queries).to include(match(/SELECT.+SUM.+FROM "merge_request_metrics" WHERE/))
end
end
it 'returns the correct count' do
post_graphql(query, current_user: current_user)
count = graphql_data.dig('project', 'mergeRequests', 'count')
expect(count).to eq(1)
end
end
end
end
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