104 lines
2.4 KiB
Ruby
104 lines
2.4 KiB
Ruby
module ActiveRecord
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class QueryRecorder
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attr_reader :log, :cached
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def initialize(&block)
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@log = []
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@cached = []
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ActiveSupport::Notifications.subscribed(method(:callback), 'sql.active_record', &block)
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end
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def show_backtrace(values)
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Rails.logger.debug("QueryRecorder SQL: #{values[:sql]}")
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caller.each { |line| Rails.logger.debug(" --> #{line}") }
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end
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def callback(name, start, finish, message_id, values)
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show_backtrace(values) if ENV['QUERY_RECORDER_DEBUG']
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if values[:name]&.include?("CACHE")
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@cached << values[:sql]
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elsif !values[:name]&.include?("SCHEMA")
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@log << values[:sql]
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end
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end
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def count
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@log.count
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end
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def cached_count
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@cached.count
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end
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def log_message
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@log.join("\n\n")
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end
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end
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end
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RSpec::Matchers.define :exceed_query_limit do |expected|
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supports_block_expectations
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match do |block|
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@subject_block = block
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actual_count > expected_count + threshold
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end
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failure_message_when_negated do |actual|
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threshold_message = threshold > 0 ? " (+#{@threshold})" : ''
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counts = "#{expected_count}#{threshold_message}"
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"Expected a maximum of #{counts} queries, got #{actual_count}:\n\n#{log_message}"
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end
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def with_threshold(threshold)
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@threshold = threshold
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self
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end
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def for_query(query)
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@query = query
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self
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end
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def threshold
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@threshold.to_i
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end
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def expected_count
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if expected.is_a?(ActiveRecord::QueryRecorder)
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expected.count
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else
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expected
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end
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end
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def actual_count
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@actual_count ||= if @query
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recorder.log.select { |recorded| recorded =~ @query }.size
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else
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recorder.count
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end
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end
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def recorder
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@recorder ||= ActiveRecord::QueryRecorder.new(&@subject_block)
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end
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def count_queries(queries)
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queries.each_with_object(Hash.new(0)) { |query, counts| counts[query] += 1 }
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end
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def log_message
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if expected.is_a?(ActiveRecord::QueryRecorder)
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counts = count_queries(expected.log)
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extra_queries = @recorder.log.reject { |query| counts[query] -= 1 unless counts[query].zero? }
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extra_queries_display = count_queries(extra_queries).map { |query, count| "[#{count}] #{query}" }
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(['Extra queries:'] + extra_queries_display).join("\n\n")
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else
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@recorder.log_message
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end
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end
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end
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