[ruby/reline] Reduce direct references to `Reline::IOGate`

(https://github.com/ruby/reline/pull/566)

* Avoid referencing IOGate from IOGate classes

The only time those classes being used is when themselves being the IOGate.
So when referencing to IOGate, it's better to use `self` instead.

* Avoid referencing to IOGate from LineEditor directly

* Avoid referencing to IOGate from Core directly

* Reference to Reline.core directly

* Replace Reline::IOGate with Reline.core.io_gate

12 files changed, 23 insertions, 23 deletions

diff --git a/test/reline/helper.rb b/test/reline/helper.rb
index b8751ff16e..bb23893187 100644
--- a/test/reline/helper.rb
+++ b/test/reline/helper.rb
@@ -29,8 +29,8 @@ module Reline
           encoding = Encoding::UTF_8
         end
         Reline::GeneralIO.reset(encoding: encoding) unless ansi
-        send(:core).config.instance_variable_set(:@test_mode, true)
-        send(:core).config.reset
+        core.config.instance_variable_set(:@test_mode, true)
+        core.config.reset
     end
 
     def test_reset
diff --git a/test/reline/test_ansi_with_terminfo.rb b/test/reline/test_ansi_with_terminfo.rb
index d7f61806a6..1f60f81bd8 100644
--- a/test/reline/test_ansi_with_terminfo.rb
+++ b/test/reline/test_ansi_with_terminfo.rb
@@ -5,7 +5,7 @@ class Reline::ANSI::TestWithTerminfo < Reline::TestCase
   def setup
     Reline.send(:test_mode, ansi: true)
     @config = Reline::Config.new
-    Reline::IOGate.set_default_key_bindings(@config, allow_terminfo: true)
+    Reline.core.io_gate.set_default_key_bindings(@config, allow_terminfo: true)
   end
 
   def teardown
diff --git a/test/reline/test_ansi_without_terminfo.rb b/test/reline/test_ansi_without_terminfo.rb
index 28b929849b..e3239cf5d8 100644
--- a/test/reline/test_ansi_without_terminfo.rb
+++ b/test/reline/test_ansi_without_terminfo.rb
@@ -5,7 +5,7 @@ class Reline::ANSI::TestWithoutTerminfo < Reline::TestCase
   def setup
     Reline.send(:test_mode, ansi: true)
     @config = Reline::Config.new
-    Reline::IOGate.set_default_key_bindings(@config, allow_terminfo: false)
+    Reline.core.io_gate.set_default_key_bindings(@config, allow_terminfo: false)
   end
 
   def teardown
diff --git a/test/reline/test_config.rb b/test/reline/test_config.rb
index c08d7ba498..b16aed720a 100644
--- a/test/reline/test_config.rb
+++ b/test/reline/test_config.rb
@@ -85,7 +85,7 @@ class Reline::Config::Test < Reline::TestCase
 
   def test_encoding_is_ascii
     @config.reset
-    Reline::IOGate.reset(encoding: Encoding::US_ASCII)
+    Reline.core.io_gate.reset(encoding: Encoding::US_ASCII)
     @config = Reline::Config.new
 
     assert_equal true, @config.convert_meta
@@ -93,7 +93,7 @@ class Reline::Config::Test < Reline::TestCase
 
   def test_encoding_is_not_ascii
     @config.reset
-    Reline::IOGate.reset(encoding: Encoding::UTF_8)
+    Reline.core.io_gate.reset(encoding: Encoding::UTF_8)
     @config = Reline::Config.new
 
     assert_equal nil, @config.convert_meta
diff --git a/test/reline/test_history.rb b/test/reline/test_history.rb
index 53360409bc..ddf8fb1472 100644
--- a/test/reline/test_history.rb
+++ b/test/reline/test_history.rb
@@ -297,7 +297,7 @@ class Reline::History::Test < Reline::TestCase
   end
 
   def get_default_internal_encoding
-    if encoding = Reline::IOGate.encoding
+    if encoding = Reline.core.encoding
       encoding
     elsif RUBY_PLATFORM =~ /mswin|mingw/
       Encoding.default_internal || Encoding::UTF_8
diff --git a/test/reline/test_key_actor_emacs.rb b/test/reline/test_key_actor_emacs.rb
index 18a2448539..4575e51eb2 100644
--- a/test/reline/test_key_actor_emacs.rb
+++ b/test/reline/test_key_actor_emacs.rb
@@ -8,7 +8,7 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
     @config.autocompletion = false
     Reline::HISTORY.instance_variable_set(:@config, @config)
     Reline::HISTORY.clear
-    @encoding = Reline::IOGate.encoding
+    @encoding = Reline.core.encoding
     @line_editor = Reline::LineEditor.new(@config, @encoding)
     @line_editor.reset(@prompt, encoding: @encoding)
   end
@@ -2167,7 +2167,7 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
 
   # Unicode emoji test
   def test_ed_insert_for_include_zwj_emoji
-    omit "This test is for UTF-8 but the locale is #{Reline::IOGate.encoding}" if Reline::IOGate.encoding != Encoding::UTF_8
+    omit "This test is for UTF-8 but the locale is #{Reline.core.encoding}" if Reline.core.encoding != Encoding::UTF_8
     # U+1F468 U+200D U+1F469 U+200D U+1F467 U+200D U+1F466 is family: man, woman, girl, boy "👨‍👩‍👧‍👦"
     input_keys("\u{1F468}") # U+1F468 is man "👨"
     assert_line("\u{1F468}")
@@ -2213,7 +2213,7 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
   end
 
   def test_ed_insert_for_include_valiation_selector
-    omit "This test is for UTF-8 but the locale is #{Reline::IOGate.encoding}" if Reline::IOGate.encoding != Encoding::UTF_8
+    omit "This test is for UTF-8 but the locale is #{Reline.core.encoding}" if Reline.core.encoding != Encoding::UTF_8
     # U+0030 U+FE00 is DIGIT ZERO + VARIATION SELECTOR-1 "0︀"
     input_keys("\u0030") # U+0030 is DIGIT ZERO
     assert_line("\u0030")
diff --git a/test/reline/test_key_actor_vi.rb b/test/reline/test_key_actor_vi.rb
index 6e1d9dbbda..20630e5809 100644
--- a/test/reline/test_key_actor_vi.rb
+++ b/test/reline/test_key_actor_vi.rb
@@ -8,7 +8,7 @@ class Reline::KeyActor::ViInsert::Test < Reline::TestCase
     @config.read_lines(<<~LINES.split(/(?<=\n)/))
       set editing-mode vi
     LINES
-    @encoding = Reline::IOGate.encoding
+    @encoding = Reline.core.encoding
     @line_editor = Reline::LineEditor.new(@config, @encoding)
     @line_editor.reset(@prompt, encoding: @encoding)
   end
diff --git a/test/reline/test_macro.rb b/test/reline/test_macro.rb
index 76a677c834..3096930830 100644
--- a/test/reline/test_macro.rb
+++ b/test/reline/test_macro.rb
@@ -4,7 +4,7 @@ class Reline::MacroTest < Reline::TestCase
   def setup
     Reline.send(:test_mode)
     @config = Reline::Config.new
-    @encoding = Reline::IOGate.encoding
+    @encoding = Reline.core.encoding
     @line_editor = Reline::LineEditor.new(@config, @encoding)
     @line_editor.instance_variable_set(:@screen_size, [24, 80])
     @output = @line_editor.output = File.open(IO::NULL, "w")
diff --git a/test/reline/test_reline.rb b/test/reline/test_reline.rb
index 33387231b4..40c880c11f 100644
--- a/test/reline/test_reline.rb
+++ b/test/reline/test_reline.rb
@@ -285,7 +285,7 @@ class Reline::Test < Reline::TestCase
     input, to_write = IO.pipe
     to_read, output = IO.pipe
     unless Reline.__send__(:input=, input)
-      omit "Setting to input is not effective on #{Reline::IOGate}"
+      omit "Setting to input is not effective on #{Reline.core.io_gate}"
     end
     Reline.output = output
 
@@ -303,12 +303,12 @@ class Reline::Test < Reline::TestCase
 
   def test_vi_editing_mode
     Reline.vi_editing_mode
-    assert_equal(Reline::KeyActor::ViInsert, Reline.send(:core).config.editing_mode.class)
+    assert_equal(Reline::KeyActor::ViInsert, Reline.core.config.editing_mode.class)
   end
 
   def test_emacs_editing_mode
     Reline.emacs_editing_mode
-    assert_equal(Reline::KeyActor::Emacs, Reline.send(:core).config.editing_mode.class)
+    assert_equal(Reline::KeyActor::Emacs, Reline.core.config.editing_mode.class)
   end
 
   def test_add_dialog_proc
@@ -374,12 +374,12 @@ class Reline::Test < Reline::TestCase
 
   def test_dumb_terminal
     lib = File.expand_path("../../lib", __dir__)
-    out = IO.popen([{"TERM"=>"dumb"}, Reline.test_rubybin, "-I#{lib}", "-rreline", "-e", "p Reline::IOGate"], &:read)
+    out = IO.popen([{"TERM"=>"dumb"}, Reline.test_rubybin, "-I#{lib}", "-rreline", "-e", "p Reline.core.io_gate"], &:read)
     assert_equal("Reline::GeneralIO", out.chomp)
   end
 
   def get_reline_encoding
-    if encoding = Reline::IOGate.encoding
+    if encoding = Reline.core.encoding
       encoding
     elsif RUBY_PLATFORM =~ /mswin|mingw/
       Encoding::UTF_8
diff --git a/test/reline/test_string_processing.rb b/test/reline/test_string_processing.rb
index 5db97545da..2e5d27dc4f 100644
--- a/test/reline/test_string_processing.rb
+++ b/test/reline/test_string_processing.rb
@@ -6,7 +6,7 @@ class Reline::LineEditor::StringProcessingTest < Reline::TestCase
     @prompt = '> '
     @config = Reline::Config.new
     Reline::HISTORY.instance_variable_set(:@config, @config)
-    @encoding = Reline::IOGate.encoding
+    @encoding = Reline.core.encoding
     @line_editor = Reline::LineEditor.new(@config, @encoding)
     @line_editor.reset(@prompt, encoding: @encoding)
   end
diff --git a/test/reline/test_within_pipe.rb b/test/reline/test_within_pipe.rb
index 930f99c32d..a42ca755fc 100644
--- a/test/reline/test_within_pipe.rb
+++ b/test/reline/test_within_pipe.rb
@@ -3,14 +3,14 @@ require_relative 'helper'
 class Reline::WithinPipeTest < Reline::TestCase
   def setup
     Reline.send(:test_mode)
-    @encoding = Reline::IOGate.encoding
+    @encoding = Reline.core.encoding
     @input_reader, @writer = IO.pipe(@encoding)
     Reline.input = @input_reader
     @reader, @output_writer = IO.pipe(@encoding)
     @output = Reline.output = @output_writer
-    @config = Reline.send(:core).config
+    @config = Reline.core.config
     @config.keyseq_timeout *= 600 if defined?(RubyVM::RJIT) && RubyVM::RJIT.enabled? # for --jit-wait CI
-    @line_editor = Reline.send(:core).line_editor
+    @line_editor = Reline.core.line_editor
   end
 
   def teardown
diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
index b1a7bf7cdc..def14edbe4 100644
--- a/test/reline/yamatanooroti/test_rendering.rb
+++ b/test/reline/yamatanooroti/test_rendering.rb
@@ -490,7 +490,7 @@ begin
     end
 
     def test_enable_bracketed_paste
-      omit if Reline::IOGate.win?
+      omit if Reline.core.io_gate.win?
       write_inputrc <<~LINES
         set enable-bracketed-paste on
       LINES
@@ -877,7 +877,7 @@ begin
     end
 
     def test_with_newline
-      omit if Reline::IOGate.win?
+      omit if Reline.core.io_gate.win?
       cmd = %Q{ruby -e 'print(%Q{abc def \\e\\r})' | ruby -I#{@pwd}/lib -rreline -e 'p Reline.readline(%{> })'}
       start_terminal(40, 50, ['bash', '-c', cmd])
       sleep 1