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author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-27 07:23:02 +0000 |
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committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-27 07:23:02 +0000 |
commit | 71dca4b60dafa87601df4ded2847411bb5b598da (patch) | |
tree | 49334554915e589e13839d94b877507f15e32fbd /test/ruby/test_io.rb | |
parent | 85fe3defcc71d40f09a6883b3db2fb5277b3df9c (diff) |
test for IO.copy_stream CPU usage (r58534)
I'm likely to make similar mistakes in the future when working
on Fiber auto-scheduling. Start adding assertions for existing
code, first.
* test/ruby/test_io.rb (test_copy_stream_no_busy_wait): added
* test/lib/test/unit/assertions.rb (assert_cpu_usage_low): added
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58924 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/ruby/test_io.rb')
-rw-r--r-- | test/ruby/test_io.rb | 12 |
1 files changed, 12 insertions, 0 deletions
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| |