test_process.rb: fix test

* test/ruby/test_process.rb (assert_fail_too_long_path): get rid of
  syntax error on sh, increase command line size until it exceeds the
  limit.  [Bug #7904]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39417 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 6 deletions

diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 9ee7bdfd93..a70dca692e 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1380,24 +1380,34 @@ class TestProcess < Test::Unit::TestCase
 
   def test_spawn_too_long_path
     bug4314 = '[ruby-core:34842]'
-    assert_fail_too_long_path("a", bug4314)
+    assert_fail_too_long_path(%w"echo", bug4314)
   end
 
   def test_aspawn_too_long_path
     bug4315 = '[ruby-core:34833]'
-    assert_fail_too_long_path("a|", bug4315)
+    assert_fail_too_long_path(%w"echo |", bug4315)
   end
 
-  def assert_fail_too_long_path(cmd, mesg)
-    size = 1_000_000 / cmd.size
+  def assert_fail_too_long_path((cmd, sep), mesg)
+    sep ||= ""
+    min = 1_000 / (cmd.size + sep.size)
+    cmds = Array.new(min, cmd)
     exs = [Errno::ENOENT]
     exs << Errno::E2BIG if defined?(Errno::E2BIG)
     EnvUtil.suppress_warning do
       assert_raise(*exs, mesg) do
         begin
-          Process.spawn(cmd * size)
+          loop do
+            Process.spawn(cmds.join(sep), [STDOUT, STDERR]=>:close)
+            min = [cmds.size, min].max
+            cmds *= 100
+          end
         rescue NoMemoryError
-          raise if (size /= 2) < 250
+          size = cmds.size
+          raise if min >= size - 1
+          min = [min, size /= 2].max
+          cmds[size..-1] = []
+          raise if size < 250
           retry
         end
       end