Module: NPlusOneControl::MinitestHelper

Defined in:
lib/n_plus_one_control/minitest.rb

Overview

Minitest assertions

Instance Method Summary collapse

Instance Method Details

#assert_perform_constant_number_of_queries(populate: nil, matching: nil, scale_factors: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/n_plus_one_control/minitest.rb', line 8

def assert_perform_constant_number_of_queries(
  populate: nil,
  matching: nil,
  scale_factors: nil
)

  raise ArgumentError, "Block is required" unless block_given?

  queries = NPlusOneControl::Executor.call(
    population: populate || method(:populate),
    matching: matching || /^SELECT/i,
    scale_factors: scale_factors || NPlusOneControl.default_scale_factors
  ) { yield }

  counts = queries.map(&:last).map(&:size)

  assert counts.max == counts.min, NPlusOneControl.failure_message(queries)
end