60 lines
1.7 KiB
Ruby
60 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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describe Gitlab::SQL::RecursiveCTE do
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let(:cte) { described_class.new(:cte_name) }
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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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rel1 = User.where(id: 1)
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rel2 = User.where(id: 2)
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cte << rel1
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cte << rel2
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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, sql2 = ActiveRecord::Base.connection.unprepared_statement do
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[rel1.except(:order).to_sql, rel2.except(:order).to_sql]
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end
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expect(sql).to eq("#{name} AS ((#{sql1})\nUNION\n(#{sql2}))")
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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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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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it 'replaces dots with an underscore' do
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table = Arel::Table.new('gitlab.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(:gitlab_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)
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cte << 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 RECURSIVE.+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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