80 lines
1.6 KiB
Ruby
80 lines
1.6 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 callback(name, start, finish, message_id, values)
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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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query_count(&block) > 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 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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@recorder.count
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end
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def query_count(&block)
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@recorder = ActiveRecord::QueryRecorder.new(&block)
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@recorder.count
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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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extra_queries = (expected.log - @recorder.log).join("\n\n")
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"Extra queries: \n\n #{extra_queries}"
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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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