* test/-ext-/old_thread_select/test_old_thread_select.rb:

  select() with timeout may return early in old Linux kernels
  with 250 Hz tickrate and no dynticks, so skip everything older
  than 2.6.32 (which has long term support).
  And, Make the timing assertions consistently use assert_operator with
  timing difference in error message
  Patch by Eric Wong. [Bug #5335] [ruby-core:39618]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33296 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 7 deletions

diff --git a/test/-ext-/old_thread_select/test_old_thread_select.rb b/test/-ext-/old_thread_select/test_old_thread_select.rb
index b70e1d3862..5653dbc021 100644
--- a/test/-ext-/old_thread_select/test_old_thread_select.rb
+++ b/test/-ext-/old_thread_select/test_old_thread_select.rb
@@ -3,6 +3,8 @@ require 'test/unit'
 class TestOldThreadSelect < Test::Unit::TestCase
   require '-test-/old_thread_select/old_thread_select'
 
+  ANCIENT_LINUX = RUBY_PLATFORM =~ /linux/ && `uname -r`.chomp < '2.6.32'
+
   def with_pipe
     r, w = IO.pipe
     begin
@@ -19,9 +21,9 @@ class TestOldThreadSelect < Test::Unit::TestCase
       rc = IO.old_thread_select([r.fileno], nil, nil, 0.001)
       diff = Time.now - t0
       assert_equal 0, rc
-      assert_operator diff, :>=, 0.001, "returned too early"
+      assert_operator diff, :>=, 0.001, "returned too early: diff=#{diff}"
     end
-  end
+  end unless ANCIENT_LINUX
 
   def test_old_select_error_timeout
     bug5299 = '[ruby-core:39380]'
@@ -30,9 +32,9 @@ class TestOldThreadSelect < Test::Unit::TestCase
       rc = IO.old_thread_select(nil, nil, [r.fileno], 0.001)
       diff = Time.now - t0
       assert_equal 0, rc, bug5299
-      assert_operator diff, :>=, 0.001, "returned too early"
+      assert_operator diff, :>=, 0.001, "returned too early: diff=#{diff}"
     end
-  end
+  end unless ANCIENT_LINUX
 
   def test_old_select_false_positive
     bug5306 = '[ruby-core:39435]'
@@ -76,15 +78,18 @@ class TestOldThreadSelect < Test::Unit::TestCase
     end
 
     rc = nil
-    t0 = Time.now
+    diff = nil
     with_pipe do |r,w|
       assert_nothing_raised do
+        t0 = Time.now
         rc = IO.old_thread_select([r.fileno], nil, nil, 1)
+        diff = Time.now - t0
       end
     end
 
-    diff = Time.now - t0
-    assert_operator diff, :>=, 1.0, "interrupted or short wait"
+    unless ANCIENT_LINUX
+      assert_operator diff, :>=, 1, "interrupted or short wait: diff=#{diff}"
+    end
     assert_equal 0, rc
     assert_equal true, thr.value
     assert_not_equal false, received, "SIGINT not received"