Module: Minitest::Assertions

Defined in:
lib/minitest/gcstats.rb

Instance Method Summary collapse

Instance Method Details

#assert_allocations(op_or_exp, exp = nil, msg = nil) ⇒ Object

Assert that the number of object allocations during block execution is what you think it is. Uses assert_operator so op should be something like :== or :<=. Defaults to :==.

assert_allocations 3 do ... end

is equivalent to:

assert_allocations :==, 3 do ... end



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# File 'lib/minitest/gcstats.rb', line 60

def assert_allocations op_or_exp, exp = nil, msg = nil
  m0 = Minitest::GCStats.current
  yield
  m1 = Minitest::GCStats.current

  op = op_or_exp
  op, exp, msg = :==, op, exp if Integer === op

  act = m1 - m0
  msg ||= "Object allocations"

  assert_operator act, op, exp, msg
end