1 files changed, 70 insertions, 49 deletions
diff --git a/spec/ruby/core/encoding/replicate_spec.rb b/spec/ruby/core/encoding/replicate_spec.rb
index 45727a5c0d..e22673db7d 100644
--- a/spec/ruby/core/encoding/replicate_spec.rb
+++ b/spec/ruby/core/encoding/replicate_spec.rb
@@ -2,66 +2,87 @@
 require_relative '../../spec_helper'
 
 describe "Encoding#replicate" do
-  before :all do
-    @i = 0
-  end
+  ruby_version_is ""..."3.3" do
+    before :all do
+      @i = 0
+    end
 
-  before :each do
-    @i += 1
-    @prefix = "RS#{@i}"
-  end
+    before :each do
+      @i += 1
+      @prefix = "RS#{@i}"
+    end
 
-  it "returns a replica of ASCII" do
-    name = @prefix + '-ASCII'
-    e = Encoding::ASCII.replicate(name)
-    e.name.should == name
-    Encoding.find(name).should == e
+    it "returns a replica of ASCII" do
+      name = @prefix + '-ASCII'
+      e = suppress_warning { Encoding::ASCII.replicate(name) }
+      e.name.should == name
+      Encoding.find(name).should == e
 
-    "a".force_encoding(e).valid_encoding?.should be_true
-    "\x80".force_encoding(e).valid_encoding?.should be_false
-  end
+      "a".dup.force_encoding(e).valid_encoding?.should be_true
+      "\x80".dup.force_encoding(e).valid_encoding?.should be_false
+    end
 
-  it "returns a replica of UTF-8" do
-    name = @prefix + 'UTF-8'
-    e = Encoding::UTF_8.replicate(name)
-    e.name.should == name
-    Encoding.find(name).should == e
+    it "returns a replica of UTF-8" do
+      name = @prefix + 'UTF-8'
+      e = suppress_warning { Encoding::UTF_8.replicate(name) }
+      e.name.should == name
+      Encoding.find(name).should == e
 
-    "a".force_encoding(e).valid_encoding?.should be_true
-    "\u3042".force_encoding(e).valid_encoding?.should be_true
-    "\x80".force_encoding(e).valid_encoding?.should be_false
-  end
+      "a".dup.force_encoding(e).valid_encoding?.should be_true
+      "\u3042".dup.force_encoding(e).valid_encoding?.should be_true
+      "\x80".dup.force_encoding(e).valid_encoding?.should be_false
+    end
 
-  it "returns a replica of UTF-16BE" do
-    name = @prefix + 'UTF-16-BE'
-    e = Encoding::UTF_16BE.replicate(name)
-    e.name.should == name
-    Encoding.find(name).should == e
+    it "returns a replica of UTF-16BE" do
+      name = @prefix + 'UTF-16-BE'
+      e = suppress_warning { Encoding::UTF_16BE.replicate(name) }
+      e.name.should == name
+      Encoding.find(name).should == e
 
-    "a".force_encoding(e).valid_encoding?.should be_false
-    "\x30\x42".force_encoding(e).valid_encoding?.should be_true
-    "\x80".force_encoding(e).valid_encoding?.should be_false
-  end
+      "a".dup.force_encoding(e).valid_encoding?.should be_false
+      "\x30\x42".dup.force_encoding(e).valid_encoding?.should be_true
+      "\x80".dup.force_encoding(e).valid_encoding?.should be_false
+    end
 
-  it "returns a replica of ISO-2022-JP" do
-    name = @prefix + 'ISO-2022-JP'
-    e = Encoding::ISO_2022_JP.replicate(name)
-    Encoding.find(name).should == e
+    it "returns a replica of ISO-2022-JP" do
+      name = @prefix + 'ISO-2022-JP'
+      e = suppress_warning { Encoding::ISO_2022_JP.replicate(name) }
+      Encoding.find(name).should == e
 
-    e.name.should == name
-    e.dummy?.should be_true
+      e.name.should == name
+      e.dummy?.should be_true
+    end
+
+    # NOTE: it's unclear of the value of this (for the complexity cost of it),
+    # but it is the current CRuby behavior.
+    it "can be associated with a String" do
+      name = @prefix + '-US-ASCII'
+      e = suppress_warning { Encoding::US_ASCII.replicate(name) }
+      e.name.should == name
+      Encoding.find(name).should == e
+
+      s = "abc".dup.force_encoding(e)
+      s.encoding.should == e
+      s.encoding.name.should == name
+    end
   end
 
-  # NOTE: it's unclear of the value of this (for the complexity cost of it),
-  # but it is the current CRuby behavior.
-  it "can be associated with a String" do
-    name = @prefix + '-US-ASCII'
-    e = Encoding::US_ASCII.replicate(name)
-    e.name.should == name
-    Encoding.find(name).should == e
+  ruby_version_is "3.2"..."3.3" do
+    it "warns about deprecation" do
+      -> {
+        Encoding::US_ASCII.replicate('MY-US-ASCII')
+      }.should complain(/warning: Encoding#replicate is deprecated and will be removed in Ruby 3.3; use the original encoding instead/)
+    end
+
+    it "raises EncodingError if too many encodings" do
+      code = '1_000.times {|i| Encoding::US_ASCII.replicate("R_#{i}") }'
+      ruby_exe(code, args: "2>&1", exit_status: 1).should.include?('too many encoding (> 256) (EncodingError)')
+    end
+  end
 
-    s = "abc".force_encoding(e)
-    s.encoding.should == e
-    s.encoding.name.should == name
+  ruby_version_is "3.3" do
+    it "has been removed" do
+      Encoding::US_ASCII.should_not.respond_to?(:replicate, true)
+    end
   end
 end