test/ruby/find_executable.rb

* test/ruby/test_rubyoptions.rb (test_program_name): use expected
  ps command from PATH.

* test/ruby/find_executable.rb (EnvUtil#find_executable): find
  expected executable path with argument and output pattern.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46751 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 29 insertions, 4 deletions

diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index 3924d5d323..6ba77de053 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -2,6 +2,7 @@
 require "open3"
 require "timeout"
 require "test/unit"
+require_relative "find_executable"
 
 module EnvUtil
   def rubybin
diff --git a/test/ruby/find_executable.rb b/test/ruby/find_executable.rb
new file mode 100644
index 0000000000..86595342a4
--- /dev/null
+++ b/test/ruby/find_executable.rb
@@ -0,0 +1,19 @@
+module EnvUtil
+  def find_executable(cmd, *args)
+    exts = RbConfig::CONFIG["EXECUTABLE_EXTS"].split | [RbConfig::CONFIG["EXEEXT"]]
+    ENV["PATH"].split(File::PATH_SEPARATOR).each do |path|
+      next if path.empty?
+      path = File.join(path, cmd)
+      exts.each do |ext|
+        cmdline = [path + ext, *args]
+        begin
+          return cmdline if yield(IO.popen(cmdline, "r", err: [:child, :out], &:read))
+        rescue
+          next
+        end
+      end
+    end
+    nil
+  end
+  module_function :find_executable
+end
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 6816d19937..22bbcf02ed 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -458,8 +458,13 @@ class TestRubyOptions < Test::Unit::TestCase
     }
   end
 
+  if /linux|freebsd|netbsd|openbsd|darwin/ =~ RUBY_PLATFORM
+    PSCMD = EnvUtil.find_executable("ps", "-o", "command", "-p", $$.to_s) {|out| /ruby/=~out}
+    PSCMD.pop if PSCMD
+  end
+
   def test_set_program_name
-    skip "platform dependent feature" if /linux|freebsd|netbsd|openbsd|darwin/ !~ RUBY_PLATFORM
+    skip "platform dependent feature" unless defined?(PSCMD) and PSCMD
 
     with_tmpchdir do
       write_file("test-script", "$0 = 'hello world'; /test-script/ =~ Process.argv0 or $0 = 'Process.argv0 changed!'; sleep 60")
@@ -468,7 +473,7 @@ class TestRubyOptions < Test::Unit::TestCase
       ps = nil
       10.times do
         sleep 0.1
-        ps = `ps -p #{pid} -o command`
+        ps = `#{PSCMD.join(' ')} #{pid}`
         break if /hello world/ =~ ps
       end
       assert_match(/hello world/, ps)
@@ -478,7 +483,7 @@ class TestRubyOptions < Test::Unit::TestCase
   end
 
   def test_setproctitle
-    skip "platform dependent feature" if /linux|freebsd|netbsd|openbsd|darwin/ !~ RUBY_PLATFORM
+    skip "platform dependent feature" unless defined?(PSCMD) and PSCMD
 
     with_tmpchdir do
       write_file("test-script", "$_0 = $0.dup; Process.setproctitle('hello world'); $0 == $_0 or Process.setproctitle('$0 changed!'); sleep 60")
@@ -487,7 +492,7 @@ class TestRubyOptions < Test::Unit::TestCase
       ps = nil
       10.times do
         sleep 0.1
-        ps = `ps -p #{pid} -o command`
+        ps = `#{PSCMD.join(' ')} #{pid}`
         break if /hello world/ =~ ps
       end
       assert_match(/hello world/, ps)