Merge pull request #2000 from ruby/use-io-null

Use IO::NULL instead of /dev/null

Author: soutaro

test/rbs/collection/config_test.rb

@@ -83,7 +83,7 @@ def test_generate_lock_from_collection_repository
 
   def test_generate_lock_from_relative_git_repository
     mktmpdir do |git_tmpdir|
-      system('git', 'clone', 'https://github.com/ruby/gem_rbs_collection.git', git_tmpdir.to_s, exception: true, 2 => '/dev/null')
+      system('git', 'clone', 'https://github.com/ruby/gem_rbs_collection.git', git_tmpdir.to_s, exception: true, 2 => IO::NULL)
 
       mktmpdir do |tmpdir|
         config_path = tmpdir / 'rbs_collection.yaml'

test/stdlib/Logger_test.rb

@@ -13,23 +13,23 @@ def test_new
     assert_send_type  "(nil) -> Logger",
                       Logger, :new, nil
     assert_send_type  "(String logdev) -> void",
-                      Logger, :new, '/dev/null'
+                      Logger, :new, IO::NULL
     assert_send_type  "(StringIO logdev) -> void",
                       Logger, :new, StringIO.new
     assert_send_type  "(String logdev, Integer shift_age) -> void",
-                      Logger, :new, '/dev/null', 1
+                      Logger, :new, IO::NULL, 1
     assert_send_type  "(String logdev, String shift_age) -> void",
-                      Logger, :new, '/dev/null', 'weekly'
+                      Logger, :new, IO::NULL, 'weekly'
     assert_send_type  "(String logdev, Integer shift_age, Integer shift_size) -> void",
-                      Logger, :new, '/dev/null', 1, 1
+                      Logger, :new, IO::NULL, 1, 1
     assert_send_type  "(String logdev, Integer shift_age, Integer shift_size, shift_period_suffix: String, binmode: bool, datetime_format: String, formatter: Proc, progname: String, level: Integer) -> void",
-                      Logger, :new, '/dev/null', 1, 1, shift_period_suffix: '%Y', binmode: true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: Logger::INFO
+                      Logger, :new, IO::NULL, 1, 1, shift_period_suffix: '%Y', binmode: true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: Logger::INFO
     assert_send_type  "(String logdev, Integer shift_age, Integer shift_size, shift_period_suffix: String, binmode: Symbol, datetime_format: String, formatter: Proc, progname: String, level: Integer) -> void",
-                      Logger, :new, '/dev/null', 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: Logger::INFO
+                      Logger, :new, IO::NULL, 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: Logger::INFO
     assert_send_type  "(String logdev, Integer shift_age, Integer shift_size, shift_period_suffix: String, binmode: Symbol, datetime_format: String, formatter: Proc, progname: String, level: String) -> void",
-                      Logger, :new, '/dev/null', 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: "INFO"
+                      Logger, :new, IO::NULL, 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: "INFO"
     assert_send_type  "(String logdev, Integer shift_age, Integer shift_size, shift_period_suffix: String, binmode: Symbol, datetime_format: String, formatter: Proc, progname: String, level: Symbol) -> void",
-                      Logger, :new, '/dev/null', 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: :INFO
+                      Logger, :new, IO::NULL, 1, 1, shift_period_suffix: '%Y', binmode: :true, datetime_format: '%Y', formatter: proc { '' }, progname: 'foo', level: :INFO
   end
 end