Ruby 3.4.3にアップグレードした

単純にRubyのバージョンだけの変更ではうまくいかなかったので差分が比較的多いです。

まずRubyのバージョンを上げてテストを実行したところ、次のようなエラーになりました

```
/Users/willnet/.rbenv/versions/3.4.3/lib/ruby/gems/3.4.0/gems/minitest-5.16.3/lib/minitest.rb:3:in 'Kernel#require': cannot load such file -- mutex_m (LoadError)
```

minitestが依存していた[mutex_m](https://github.com/ruby/mutex_m)がbundled gemになった結果このエラーになったと判断し、bundle updateでminitestのバージョンを上げました。

すると今度は次のようなエラーになりました。

```
/Users/willnet/ghq/github.com/kinoppyd/reading-metaprogramming-ruby/00_setup/test/test_try_out.rb:4:in '<top (required)>': uninitialized constant MiniTest (NameError)

class TestTryOut < MiniTest::Test
```

これは、"MiniTest"という古い参照の仕方が[+ Only load minitest/unit (aka ancient MiniTest compatibility layer) … · minitest/minitest@a2c6c18](https://github.com/minitest/minitest/commit/a2c6c18570f6f0a1bf6af70fe3b6d9599a13fdd6)で消されたのが原因のようです。一括置換で"Minitest"に変更して対応しました。

これでテストが通るようになったので大丈夫なはず。

Author: willnet

.ruby-version

@@ -1 +1 @@
-3.3.1
+3.4.3

00_setup/test/test_try_out.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 require '01_try_out'
 
-class TestTryOut < MiniTest::Test
+class TestTryOut < Minitest::Test
   def test_first_last_name
     target = TryOut.new("John", "Wick")
     assert_equal "John Wick", target.full_name
@@ -48,4 +48,3 @@ def test_too_many_arguments
     assert_raises (ArgumentError) {TryOut.new("John", "Milton", "Cage", "Jr")}
   end
 end
-

02_object_model/test/test_hierarchy.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 require '02_hierarchy'
 
-class TestHierarchy < MiniTest::Test
+class TestHierarchy < Minitest::Test
   def test_c1_ancestors
     assert_equal [C1, M1], C1.ancestors.first(2)
   end

02_object_model/test/test_hoge.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 require '01_hoge'
 
-class TestHoge < MiniTest::Test
+class TestHoge < Minitest::Test
   def test_hoge_in_string
     assert_equal "hoge","hoge".hoge
   end

03_method/test/test_define.rb

@@ -2,7 +2,7 @@
 require '02_define'
 require 'securerandom'
 
-class TestDefine < MiniTest::Test
+class TestDefine < Minitest::Test
 
   begin
     class A3

03_method/test/test_method_first_step.rb

@@ -2,7 +2,7 @@
 require 'securerandom'
 require '01_method_first_step'
 
-class TestMethodFirstStep < MiniTest::Test
+class TestMethodFirstStep < Minitest::Test
   def test_hello
     assert_equal F1.new.hello, 'hello'
   end

03_method/test/test_try_over3_3.rb

@@ -4,7 +4,7 @@
 class TestTryOver03Q1 < Minitest::Test
   def test_q1_called_run_test
     a1 = TryOver3::A1.new
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     a1.stub(:run_test, mock) do
       a1.test_hoge
     end
@@ -121,4 +121,3 @@ def orignal_accessor_included_instance
     end.new
   end
 end
-

04_block/test/test_block_first_step.rb

@@ -12,7 +12,7 @@ def self.call(&block)
 
 require '01_block_first_step'
 
-class TestBlockFirstStep < MiniTest::Test
+class TestBlockFirstStep < Minitest::Test
   def test_my_math
     assert_equal 4, MyMath.new.two_times { 2 }
   end

04_block/test/test_evil_mailbox.rb

@@ -2,9 +2,9 @@
 require '02_evil_mailbox'
 require 'securerandom'
 
-class TestEvilMailbox < MiniTest::Test
+class TestEvilMailbox < Minitest::Test
   def evil_mailbox(&block)
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     mock.instance_eval(&block) if block_given?
     [EvilMailbox.new(mock), mock]
   end
@@ -58,15 +58,15 @@ def test_send_mail_exec_block_with_result_false
 
   def test_mail_object_auth
     secret_string = SecureRandom.hex
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     mock.expect :auth, true, [String]
     EvilMailbox.new(mock, secret_string)
     mock.verify
   end
 
   def test_send_mail_with_secret_string
     secret_string = SecureRandom.hex
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     mock.expect :auth, true, [String]
     mock.expect :send_mail, true, ["ppyd", "hello#{secret_string}"]
     mb = EvilMailbox.new(mock, secret_string)
@@ -77,7 +77,7 @@ def test_send_mail_with_secret_string
 
   def test_no_secret_string_in_object
     secret_string = SecureRandom.hex
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     mock.expect :auth, true, [String]
     mb = EvilMailbox.new(mock, secret_string)
 
@@ -91,7 +91,7 @@ def test_no_secret_string_in_object
   end
 
   def evil_mailbox_with_secret_string(secret_string, &block)
-    mock = MiniTest::Mock.new
+    mock = Minitest::Mock.new
     mock.instance_eval(&block) if block_given?
     [EvilMailbox.new(mock, secret_string), mock]
   end

04_block/test/test_simple_bot.rb

@@ -2,7 +2,7 @@
 require 'securerandom'
 require '03_simple_bot'
 
-class TestSimpleBot < MiniTest::Test
+class TestSimpleBot < Minitest::Test
   def bot_for_test(&block)
     Class.new(SimpleBot, &block)
   end