https://git.ruby-lang.org/ruby.git/commit/?id=d0983af61c

From d0983af61c115ba2793df1a840b8a531317c5acf Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 10 May 2022 10:15:27 +0900
Subject: Fix the order of assert_eqaul and remove unused variables

---
 test/ruby/test_io_buffer.rb | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/test/ruby/test_io_buffer.rb b/test/ruby/test_io_buffer.rb
index d77f0afec8..0f8a9c5e80 100644
--- a/test/ruby/test_io_buffer.rb
+++ b/test/ruby/test_io_buffer.rb
@@ -335,22 +335,20 @@ class TestIOBuffer < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_io_buffer.rb#L335
   def test_operators
     source = IO::Buffer.for("1234123412")
     mask = IO::Buffer.for("133\x00")
-    result = source & mask
 
-    assert_equal (source & mask), IO::Buffer.for("123\x00123\x0012")
-    assert_equal (source | mask), IO::Buffer.for("1334133413")
-    assert_equal (source ^ mask), IO::Buffer.for("\x00\x01\x004\x00\x01\x004\x00\x01")
-    assert_equal ~source, IO::Buffer.for("\xce\xcd\xcc\xcb\xce\xcd\xcc\xcb\xce\xcd")
+    assert_equal IO::Buffer.for("123\x00123\x0012"), (source & mask)
+    assert_equal IO::Buffer.for("1334133413"), (source | mask)
+    assert_equal IO::Buffer.for("\x00\x01\x004\x00\x01\x004\x00\x01"), (source ^ mask)
+    assert_equal IO::Buffer.for("\xce\xcd\xcc\xcb\xce\xcd\xcc\xcb\xce\xcd"), ~source
   end
 
   def test_inplace_operators
     source = IO::Buffer.for("1234123412")
     mask = IO::Buffer.for("133\x00")
-    result = source & mask
 
-    assert_equal source.dup.and!(mask), IO::Buffer.for("123\x00123\x0012")
-    assert_equal source.dup.or!(mask), IO::Buffer.for("1334133413")
-    assert_equal source.dup.xor!(mask), IO::Buffer.for("\x00\x01\x004\x00\x01\x004\x00\x01")
-    assert_equal source.dup.not!, IO::Buffer.for("\xce\xcd\xcc\xcb\xce\xcd\xcc\xcb\xce\xcd")
+    assert_equal IO::Buffer.for("123\x00123\x0012"), source.dup.and!(mask)
+    assert_equal IO::Buffer.for("1334133413"), source.dup.or!(mask)
+    assert_equal IO::Buffer.for("\x00\x01\x004\x00\x01\x004\x00\x01"), source.dup.xor!(mask)
+    assert_equal IO::Buffer.for("\xce\xcd\xcc\xcb\xce\xcd\xcc\xcb\xce\xcd"), source.dup.not!
   end
 end
-- 
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