From 3ba667b46f3d0e7dcfaeed40b435a0a3b9cf0d85 Mon Sep 17 00:00:00 2001
From: Herwin <herwinw@users.noreply.github.com>
Date: Sun, 18 Jan 2026 19:48:43 +0100
Subject: [PATCH 1/2] Add specs for IO.select with Float::INFINITY as timeout
 argument

---
 core/io/select_spec.rb | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/core/io/select_spec.rb b/core/io/select_spec.rb
index 3893e7620f..3872bb4af2 100644
--- a/core/io/select_spec.rb
+++ b/core/io/select_spec.rb
@@ -162,3 +162,19 @@
     t.join
   end
 end
+
+ruby_version_is "4.0" do
+  describe "IO.select when passed Float::INFINITY for timeout" do
+    it "sleeps forever and sets the thread status to 'sleep'" do
+      t = Thread.new do
+        IO.select(nil, nil, nil, Float::INFINITY)
+      end
+
+      Thread.pass while t.status && t.status != "sleep"
+      t.join unless t.status
+      t.status.should == "sleep"
+      t.kill
+      t.join
+    end
+  end
+end

From a2d09e25bae3ce9f710246e3e28a292fb802c415 Mon Sep 17 00:00:00 2001
From: Herwin <herwinw@users.noreply.github.com>
Date: Sun, 18 Jan 2026 19:53:02 +0100
Subject: [PATCH 2/2] Remove duplication from IO.select with infinite timeout

---
 core/io/select_spec.rb | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

diff --git a/core/io/select_spec.rb b/core/io/select_spec.rb
index 3872bb4af2..9fdb7e12c9 100644
--- a/core/io/select_spec.rb
+++ b/core/io/select_spec.rb
@@ -149,25 +149,11 @@
   end
 end
 
-describe "IO.select when passed nil for timeout" do
-  it "sleeps forever and sets the thread status to 'sleep'" do
-    t = Thread.new do
-      IO.select(nil, nil, nil, nil)
-    end
-
-    Thread.pass while t.status && t.status != "sleep"
-    t.join unless t.status
-    t.status.should == "sleep"
-    t.kill
-    t.join
-  end
-end
-
-ruby_version_is "4.0" do
-  describe "IO.select when passed Float::INFINITY for timeout" do
+describe "IO.select with infinite timeout" do
+  describe :io_select_infinite_timeout, shared: true do
     it "sleeps forever and sets the thread status to 'sleep'" do
       t = Thread.new do
-        IO.select(nil, nil, nil, Float::INFINITY)
+        IO.select(nil, nil, nil, @method)
       end
 
       Thread.pass while t.status && t.status != "sleep"
@@ -177,4 +163,14 @@
       t.join
     end
   end
+
+  describe "IO.select when passed nil for timeout" do
+    it_behaves_like :io_select_infinite_timeout, nil
+  end
+
+  ruby_version_is "4.0" do
+    describe "IO.select when passed Float::INFINITY for timeout" do
+      it_behaves_like :io_select_infinite_timeout, Float::INFINITY
+    end
+  end
 end