gitlab-org--gitlab-foss/spec/services/auto_merge_service_spec.rb

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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe AutoMergeService do
let_it_be(:project) { create(:project, :repository) }
let_it_be(:user) { create(:user) }
let(:service) { described_class.new(project, user) }
before_all do
project.add_maintainer(user)
end
describe '.all_strategies_ordered_by_preference' do
subject { described_class.all_strategies_ordered_by_preference }
it 'returns all strategies in preference order' do
if Gitlab.ee?
is_expected.to eq(
[AutoMergeService::STRATEGY_MERGE_TRAIN,
AutoMergeService::STRATEGY_ADD_TO_MERGE_TRAIN_WHEN_PIPELINE_SUCCEEDS,
AutoMergeService::STRATEGY_MERGE_WHEN_PIPELINE_SUCCEEDS])
else
is_expected.to eq([AutoMergeService::STRATEGY_MERGE_WHEN_PIPELINE_SUCCEEDS])
end
end
end
describe '#available_strategies' do
subject { service.available_strategies(merge_request) }
let(:merge_request) do
create(:merge_request, source_project: project)
end
let(:pipeline_status) { :running }
before do
create(:ci_pipeline, pipeline_status, ref: merge_request.source_branch,
sha: merge_request.diff_head_sha,
project: merge_request.source_project)
merge_request.update_head_pipeline
end
it 'returns available strategies' do
is_expected.to include('merge_when_pipeline_succeeds')
end
context 'when the head piipeline succeeded' do
let(:pipeline_status) { :success }
it 'returns available strategies' do
is_expected.to be_empty
end
end
end
describe '#preferred_strategy' do
subject { service.preferred_strategy(merge_request) }
let(:merge_request) do
create(:merge_request, source_project: project)
end
let(:pipeline_status) { :running }
before do
create(:ci_pipeline, pipeline_status, ref: merge_request.source_branch,
sha: merge_request.diff_head_sha,
project: merge_request.source_project)
merge_request.update_head_pipeline
end
it 'returns preferred strategy' do
is_expected.to eq('merge_when_pipeline_succeeds')
end
context 'when the head piipeline succeeded' do
let(:pipeline_status) { :success }
it 'returns available strategies' do
is_expected.to be_nil
end
end
end
describe '.get_service_class' do
subject { described_class.get_service_class(strategy) }
let(:strategy) { AutoMergeService::STRATEGY_MERGE_WHEN_PIPELINE_SUCCEEDS }
it 'returns service instance' do
is_expected.to eq(AutoMerge::MergeWhenPipelineSucceedsService)
end
context 'when strategy is not present' do
let(:strategy) { }
it 'returns nil' do
is_expected.to be_nil
end
end
end
describe '#execute' do
subject { service.execute(merge_request, strategy) }
let(:merge_request) do
create(:merge_request, source_project: project)
end
let(:pipeline_status) { :running }
let(:strategy) { AutoMergeService::STRATEGY_MERGE_WHEN_PIPELINE_SUCCEEDS }
before do
create(:ci_pipeline, pipeline_status, ref: merge_request.source_branch,
sha: merge_request.diff_head_sha,
project: merge_request.source_project)
merge_request.update_head_pipeline
end
it 'delegates to a relevant service instance' do
expect_next_instance_of(AutoMerge::MergeWhenPipelineSucceedsService) do |service|
expect(service).to receive(:execute).with(merge_request)
end
subject
end
context 'when the head piipeline succeeded' do
let(:pipeline_status) { :success }
it 'returns failed' do
is_expected.to eq(:failed)
end
end
context 'when strategy is not specified' do
let(:strategy) { }
it 'chooses the most preferred strategy' do
is_expected.to eq(:merge_when_pipeline_succeeds)
end
end
end
describe '#update' do
subject { service.update(merge_request) }
context 'when auto merge is enabled' do
let(:merge_request) { create(:merge_request, :merge_when_pipeline_succeeds) }
it 'delegates to a relevant service instance' do
expect_next_instance_of(AutoMerge::MergeWhenPipelineSucceedsService) do |service|
expect(service).to receive(:update).with(merge_request)
end
subject
end
end
context 'when auto merge is not enabled' do
let(:merge_request) { create(:merge_request) }
it 'returns failed' do
is_expected.to eq(:failed)
end
end
end
describe '#process' do
subject { service.process(merge_request) }
let(:merge_request) { create(:merge_request, :merge_when_pipeline_succeeds) }
it 'delegates to a relevant service instance' do
expect_next_instance_of(AutoMerge::MergeWhenPipelineSucceedsService) do |service|
expect(service).to receive(:process).with(merge_request)
end
subject
end
context 'when auto merge is not enabled' do
let(:merge_request) { create(:merge_request) }
it 'returns nil' do
is_expected.to be_nil
end
end
end
describe '#cancel' do
subject { service.cancel(merge_request) }
let(:merge_request) { create(:merge_request, :merge_when_pipeline_succeeds) }
it 'delegates to a relevant service instance' do
expect_next_instance_of(AutoMerge::MergeWhenPipelineSucceedsService) do |service|
expect(service).to receive(:cancel).with(merge_request)
end
subject
end
context 'when auto merge is not enabled' do
let(:merge_request) { create(:merge_request) }
it 'returns error' do
expect(subject[:message]).to eq("Can't cancel the automatic merge")
expect(subject[:status]).to eq(:error)
expect(subject[:http_status]).to eq(406)
end
end
end
describe '#abort' do
subject { service.abort(merge_request, error) }
let(:merge_request) { create(:merge_request, :merge_when_pipeline_succeeds) }
let(:error) { 'an error' }
it 'delegates to a relevant service instance' do
expect_next_instance_of(AutoMerge::MergeWhenPipelineSucceedsService) do |service|
expect(service).to receive(:abort).with(merge_request, error)
end
subject
end
context 'when auto merge is not enabled' do
let(:merge_request) { create(:merge_request) }
it 'returns error' do
expect(subject[:message]).to eq("Can't abort the automatic merge")
expect(subject[:status]).to eq(:error)
expect(subject[:http_status]).to eq(406)
end
end
end
end