43 lines
1.3 KiB
Ruby
43 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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RSpec.shared_examples 'from set operator' do |sql_klass|
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from_set_operator_concern = described_class
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operator_keyword = sql_klass.operator_keyword
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operator_method = "from_#{sql_klass.operator_keyword.downcase}"
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describe "##{operator_method}" do
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let(:model) do
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Class.new(ActiveRecord::Base) do
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self.table_name = 'users'
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include from_set_operator_concern
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end
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end
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it "selects from the results of the #{operator_keyword}" do
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query = model.public_send(operator_method, [model.where(id: 1), model.where(id: 2)])
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expect(query.to_sql).to match(/FROM \(\(SELECT.+\)\n#{operator_keyword}\n\(SELECT.+\)\) users/m)
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end
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it 'supports the use of a custom alias for the sub query' do
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query = model.public_send(operator_method,
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[model.where(id: 1), model.where(id: 2)],
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alias_as: 'kittens'
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)
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expect(query.to_sql).to match(/FROM \(\(SELECT.+\)\n#{operator_keyword}\n\(SELECT.+\)\) kittens/m)
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end
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it 'supports keeping duplicate rows' do
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query = model.public_send(operator_method,
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[model.where(id: 1), model.where(id: 2)],
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remove_duplicates: false
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)
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expect(query.to_sql)
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.to match(/FROM \(\(SELECT.+\)\n#{operator_keyword} ALL\n\(SELECT.+\)\) users/m)
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end
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end
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end
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