Module: RSpecPower::PerformanceHelpers

Defined in:
lib/rspec_power/performance.rb

Instance Method Summary collapse

Instance Method Details

#with_maximum_execution_time(max_duration_ms) ⇒ Object

Ensures the given block completes within the specified duration (milliseconds). Raises RSpec::Expectations::ExpectationNotMetError if the threshold is exceeded.



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# File 'lib/rspec_power/performance.rb', line 5

def with_maximum_execution_time(max_duration_ms)
  raise ArgumentError, "with_maximum_execution_time requires a block" unless block_given?

  max_ms = max_duration_ms.to_f
  start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  yield
ensure
  elapsed_ms = (Process.clock_gettime(Process::CLOCK_MONOTONIC) - start_time) * 1000.0
  # Do not override an existing exception
  if $!.nil? && elapsed_ms > max_ms
    formatted_elapsed = format("%.3f", elapsed_ms)
    formatted_limit = format("%.3f", max_ms)
    raise RSpec::Expectations::ExpectationNotMetError,
          "Execution time exceeded: #{formatted_elapsed}ms > #{formatted_limit}ms"
  end
end