https://git.ruby-lang.org/ruby.git/commit/?id=c433d36b5b

From c433d36b5bd0b6a649a0c4112a9868bd5190cbc6 Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@u...>
Date: Wed, 3 Aug 2022 11:12:18 -0400
Subject: Test that File.read defaults to text mode

Co-authored-by: Nobuyoshi Nakada <nobu@r...>
---
 spec/ruby/core/io/read_spec.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/spec/ruby/core/io/read_spec.rb b/spec/ruby/core/io/read_spec.rb
index 841e693f37..28cab13340 100644
--- a/spec/ruby/core/io/read_spec.rb
+++ b/spec/ruby/core/io/read_spec.rb
@@ -104,6 +104,14 @@ describe "IO.read" do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/io/read_spec.rb#L104
     str = IO.read(@fname, encoding: Encoding::ISO_8859_1)
     str.encoding.should == Encoding::ISO_8859_1
   end
+
+  platform_is :windows do
+    it "reads the file in text mode" do
+      # 0x1A is CTRL+Z and is EOF in Windows text mode.
+      File.binwrite(@fname, "\x1Abbb")
+      IO.read(@fname).should.empty?
+    end
+  end
 end
 
 describe "IO.read from a pipe" do
-- 
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