Add specs for frozen state of ranges on creation and cloning.

Author: aardvark179

spec/ruby/core/range/clone_spec.rb

@@ -0,0 +1,22 @@
+require_relative '../../spec_helper'
+
+describe "Range#clone" do
+  it "duplicates the range" do
+    copy = (1..3).clone
+    copy.begin.should == 1
+    copy.end.should == 3
+    copy.should_not.exclude_end?
+
+    copy = ("a"..."z").clone
+    copy.begin.should == "a"
+    copy.end.should == "z"
+    copy.should.exclude_end?
+  end
+
+  it "maintains the frozen state" do
+    (1..2).clone.frozen?.should == (1..2).frozen?
+    (1..).clone.frozen?.should == (1..).frozen?
+    Range.new(1, 2).clone.frozen?.should == Range.new(1, 2).frozen?
+    Class.new(Range).new(1, 2).clone.frozen?.should == Class.new(Range).new(1, 2).frozen?
+  end
+end

spec/ruby/core/range/new_spec.rb

@@ -65,5 +65,15 @@
 
       range_exclude.should_not == range_include
     end
+
+    ruby_version_is "3.0" do
+      it "creates a frozen range if the class is Range.class" do
+        Range.new(1, 2).should.frozen?
+      end
+
+      it "does not create a frozen range if the class is not Range.class" do
+        Class.new(Range).new(1, 2).should_not.frozen?
+      end
+    end
   end
 end