66 lines
1.9 KiB
Ruby
66 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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module TriggerHelpers
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def expect_function_to_exist(name)
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expect(find_function_def(name)).not_to be_nil
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end
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def expect_function_not_to_exist(name)
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expect(find_function_def(name)).to be_nil
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end
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def expect_function_to_contain(name, *statements)
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return_stmt, *body_stmts = parsed_function_statements(name).reverse
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expect(return_stmt).to eq('return old')
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expect(body_stmts).to contain_exactly(*statements)
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end
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def expect_trigger_not_to_exist(table_name, name)
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expect(find_trigger_def(table_name, name)).to be_nil
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end
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def expect_valid_function_trigger(table_name, name, fn_name, fires_on)
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events, timing, definition = cleaned_trigger_def(table_name, name)
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events = events&.split(',')
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expected_timing, expected_events = fires_on.first
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expect(timing).to eq(expected_timing.to_s)
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expect(events).to match_array(Array.wrap(expected_events))
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expect(definition).to match(%r{execute (?:procedure|function) #{fn_name}()})
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end
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private
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def parsed_function_statements(name)
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cleaned_definition = find_function_def(name)['body'].downcase.gsub(/\s+/, ' ')
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statements = cleaned_definition.sub(/\A\s*begin\s*(.*)\s*end\s*\Z/, "\\1")
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statements.split(';').map! { |stmt| stmt.strip.presence }.compact!
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end
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def find_function_def(name)
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connection.select_one(<<~SQL)
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SELECT prosrc AS body
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FROM pg_proc
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WHERE proname = '#{name}'
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SQL
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end
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def cleaned_trigger_def(table_name, name)
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find_trigger_def(table_name, name).values_at('event', 'action_timing', 'action_statement').map!(&:downcase)
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end
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def find_trigger_def(table_name, name)
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connection.select_one(<<~SQL)
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SELECT
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string_agg(event_manipulation, ',') AS event,
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action_timing,
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action_statement
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FROM information_schema.triggers
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WHERE event_object_table = '#{table_name}'
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AND trigger_name = '#{name}'
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GROUP BY 2, 3
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SQL
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end
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end
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