45 lines
1.3 KiB
Ruby
45 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::SQL::CTE do
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describe '#to_arel' do
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it 'generates an Arel relation for the CTE body' do
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relation = User.where(id: 1)
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cte = described_class.new(:cte_name, relation)
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sql = cte.to_arel.to_sql
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name = ActiveRecord::Base.connection.quote_table_name(:cte_name)
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sql1 = ActiveRecord::Base.connection.unprepared_statement do
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relation.except(:order).to_sql
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end
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expect(sql).to eq("#{name} AS (#{sql1})")
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end
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end
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describe '#alias_to' do
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it 'returns an alias for the CTE' do
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cte = described_class.new(:cte_name, nil)
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table = Arel::Table.new(:kittens)
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source_name = ActiveRecord::Base.connection.quote_table_name(:cte_name)
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alias_name = ActiveRecord::Base.connection.quote_table_name(:kittens)
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expect(cte.alias_to(table).to_sql).to eq("#{source_name} AS #{alias_name}")
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end
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end
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describe '#apply_to' do
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it 'applies a CTE to an ActiveRecord::Relation' do
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user = create(:user)
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cte = described_class.new(:cte_name, User.where(id: user.id))
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relation = cte.apply_to(User.all)
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expect(relation.to_sql).to match(/WITH .+cte_name/)
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expect(relation.to_a).to eq(User.where(id: user.id).to_a)
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end
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end
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end
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