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

1 files changed, 19 insertions, 0 deletions

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