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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe MergeRequests::ReloadMergeHeadDiffService do
let(:merge_request) { create(:merge_request) }
subject { described_class.new(merge_request).execute }
describe '#execute' do
before do
MergeRequests::MergeToRefService
.new(project: merge_request.project, current_user: merge_request.author)
.execute(merge_request)
end
it 'creates a merge head diff' do
expect(subject[:status]).to eq(:success)
expect(merge_request.reload.merge_head_diff).to be_present
end
context 'when merge ref head is not present' do
before do
allow(merge_request).to receive(:merge_ref_head).and_return(nil)
end
it 'returns error' do
expect(subject[:status]).to eq(:error)
end
end
context 'when failed to create merge head diff' do
before do
allow(merge_request).to receive(:create_merge_head_diff!).and_raise('fail')
end
it 'returns error' do
expect(subject[:status]).to eq(:error)
end
end
context 'when there is existing merge head diff' do
let!(:existing_merge_head_diff) { create(:merge_request_diff, :merge_head, merge_request: merge_request) }
it 'recreates merge head diff' do
expect(subject[:status]).to eq(:success)
expect(merge_request.reload.merge_head_diff).not_to eq(existing_merge_head_diff)
end
end
end
end
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