https://git.ruby-lang.org/ruby.git/commit/?id=17b088d1e5

From 17b088d1e5d0378d9752f807e607adde0cb47ef1 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Thu, 12 Mar 2020 15:30:20 +0900
Subject: Update some syslog tests to absurb the format change of FreeBSD
 syslog

FreeBSD

```
$ ruby -rsyslog -e 'Syslog.open("rubyspec", Syslog::LOG_PERROR) {|s| s.log(Syslog::LOG_ALERT, "Hello") }'
rubyspec 78462 - - Hello
```

Linux

```
$ ruby -rsyslog -e 'Syslog.open("rubyspec", Syslog::LOG_PERROR) {|s| s.log(Syslog::LOG_ALERT, "Hello") }'
rubyspec: Hello
```

https://github.com/freebsd/freebsd/commit/591ef7c8076109cff3c41f9bb50da996a34121e9

diff --git a/spec/ruby/library/syslog/log_spec.rb b/spec/ruby/library/syslog/log_spec.rb
index ee62d48..389da77 100644
--- a/spec/ruby/library/syslog/log_spec.rb
+++ b/spec/ruby/library/syslog/log_spec.rb
@@ -20,7 +20,7 @@ platform_is_not :windows do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/syslog/log_spec.rb#L20
             s.log(Syslog::LOG_ALERT, "Hello")
             s.log(Syslog::LOG_CRIT, "World")
           end
-        }.should output_to_fd("rubyspec: Hello\nrubyspec: World\n", $stderr)
+        }.should output_to_fd(/\Arubyspec(?::| \d+ - -) Hello\nrubyspec(?::| \d+ - -) World\n\z/, $stderr)
       end
 
       it "accepts undefined priorities" do
@@ -29,7 +29,7 @@ platform_is_not :windows do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/syslog/log_spec.rb#L29
             s.log(1337, "Hello")
           end
           # use a regex since it'll output unknown facility/priority messages
-        }.should output_to_fd(/rubyspec: Hello/, $stderr)
+        }.should output_to_fd(/rubyspec(?::| \d+ - -) Hello\n\z/, $stderr)
       end
 
       it "fails with TypeError on nil log messages" do
@@ -49,7 +49,7 @@ platform_is_not :windows do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/syslog/log_spec.rb#L49
           Syslog.open("rubyspec", Syslog::LOG_PERROR) do |s|
             s.log(Syslog::LOG_ALERT, "%s x %d", "chunky bacon", 2)
           end
-        }.should output_to_fd("rubyspec: chunky bacon x 2\n", $stderr)
+        }.should output_to_fd(/rubyspec(?::| \d+ - -) chunky bacon x 2\n\z/, $stderr)
       end
     end
   end
diff --git a/spec/ruby/library/syslog/shared/log.rb b/spec/ruby/library/syslog/shared/log.rb
index b19c2ea..2947f5d 100644
--- a/spec/ruby/library/syslog/shared/log.rb
+++ b/spec/ruby/library/syslog/shared/log.rb
@@ -13,7 +13,7 @@ describe :syslog_log, shared: true do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/syslog/shared/log.rb#L13
         Syslog.open("rubyspec", Syslog::LOG_PERROR) do
           Syslog.send(@method, "Hello")
         end
-      }.should output_to_fd("rubyspec: Hello\n", $stderr)
+      }.should output_to_fd(/\Arubyspec(?::| \d+ - -) Hello\n\z/, $stderr)
     end
 
     it "accepts sprintf arguments" do
@@ -22,19 +22,18 @@ describe :syslog_log, shared: true do https://github.com/ruby/ruby/blob/trunk/spec/ruby/library/syslog/shared/log.rb#L22
           Syslog.send(@method, "Hello %s", "world")
           Syslog.send(@method, "%d dogs", 2)
         end
-      }.should output_to_fd("rubyspec: Hello world\nrubyspec: 2 dogs\n", $stderr)
+      }.should output_to_fd(/\Arubyspec(?::| \d+ - -) Hello world\nrubyspec(?::| \d+ - -) 2 dogs\n\z/, $stderr)
     end
 
     it "works as an alias for Syslog.log" do
       level = Syslog.const_get "LOG_#{@method.to_s.upcase}"
-      response = "rubyspec: Hello\n"
       -> {
         Syslog.open("rubyspec", Syslog::LOG_PERROR) do
           Syslog.send(@method, "Hello")
           Syslog.log(level, "Hello")
         end
         # make sure the same thing is written to $stderr.
-      }.should output_to_fd(response * 2, $stderr)
+      }.should output_to_fd(/\A(?:rubyspec(?::| \d+ - -) Hello\n){2}\z/, $stderr)
     end
   end
 end
diff --git a/test/test_syslog.rb b/test/test_syslog.rb
index 5327814..842ae8d 100644
--- a/test/test_syslog.rb
+++ b/test/test_syslog.rb
@@ -113,7 +113,7 @@ class TestSyslog < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/test_syslog.rb#L113
   end
 
   def syslog_line_regex(ident, message)
-    /(?:^| )#{Regexp.quote(ident)}(?:\[([1-9][0-9]*)\])?(?: |[: ].* )#{Regexp.quote(message)}$/
+    /(?:^| )#{Regexp.quote(ident)}(?:\[([1-9][0-9]*)\])?(?: | ([1-9][0-9]*) - - ||[: ].* )#{Regexp.quote(message)}$/
   end
 
   def test_log
@@ -170,8 +170,9 @@ class TestSyslog < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/test_syslog.rb#L170
         end
         m = re.match(line)
         assert_not_nil(m)
-        assert_not_nil(m[1])
-        assert_equal(pid, m[1].to_i)
+        output_pid = m[1] || m[2]
+        assert_not_nil(output_pid)
+        assert_equal(pid, output_pid.to_i)
       }
     }
   end
-- 
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