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MIN_HZ and MIN_MEASURABLE constants

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* test/lib/test/unit/assertions.rb (Test::Unit::Assertions):
  promoted MIN_HZ and MIN_MEASURABLE as constants, which should be
  constant through the process.
This commit is contained in:
Nobuyoshi Nakada 2019-06-11 11:09:02 +09:00
parent eb016d8353
commit 42f0a8fd6f
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1 changed files with 6 additions and 4 deletions
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test/lib/test/unit/assertions.rb
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@ -756,6 +756,11 @@ eom
skip
end
# kernel resolution can limit the minimum time we can measure
# [ruby-core:81540]
MIN_HZ = MiniTest::Unit::TestCase.windows? ? 67 : 100
MIN_MEASURABLE = 1.0 / MIN_HZ
def assert_cpu_usage_low(msg = nil, pct: 0.05)
require 'benchmark'
@ -765,10 +770,7 @@ eom
warn "test #{msg || 'assert_cpu_usage_low'} too short to be accurate"
end
# kernel resolution can limit the minimum time we can measure
# [ruby-core:81540]
min_hz = windows? ? 67 : 100
min_measurable = 1.0 / min_hz
min_measurable = MIN_MEASURABLE
min_measurable *= 1.30 # add a little (30%) to account for misc. overheads
if max < min_measurable
max = min_measurable