diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/lib/test/unit/assertions.rb | 7 | ||||
| -rw-r--r-- | test/ruby/test_io.rb | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/test/lib/test/unit/assertions.rb b/test/lib/test/unit/assertions.rb index 976a6fd04a..92f754064a 100644 --- a/test/lib/test/unit/assertions.rb +++ b/test/lib/test/unit/assertions.rb @@ -715,6 +715,13 @@ eom skip end + def assert_cpu_usage_low(msg = nil, pct: 0.005) + require 'benchmark' + tms = Benchmark.measure(msg || '') { yield } + max = pct * tms.real + assert_operator tms.total, :<=, max, msg + end + def assert_is_minus_zero(f) assert(1.0/f == -Float::INFINITY, "#{f} is not -0.0") end diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb index 2b82470b8c..5d14aae601 100644 --- a/test/ruby/test_io.rb +++ b/test/ruby/test_io.rb @@ -532,6 +532,18 @@ class TestIO < Test::Unit::TestCase end if have_nonblock? + def test_copy_stream_no_busy_wait + IO.pipe do |r,w| + r.nonblock = true + assert_cpu_usage_low('r58534 [ruby-core:80969] [Backport #13533]') do + th = Thread.new { IO.copy_stream(r, IO::NULL) } + sleep 0.1 + w.close + th.join + end + end + end + def test_copy_stream_pipe_nonblock mkcdtmpdir { with_read_pipe("abc") {|r1| |