Add spec for Kernel#clone(freeze: true/false) calling #initialize_clo…

…ne(freeze: true/false)

core/kernel/clone_spec.rb

@@ -28,27 +28,88 @@ def klass.allocate
     clone.class.should equal klass
   end
 
-  it "copies frozen state from the original" do
-    o2 = @obj.clone
-    @obj.freeze
-    o3 = @obj.clone
+  describe "with no arguments" do
+    it "copies frozen state from the original" do
+      o2 = @obj.clone
+      @obj.freeze
+      o3 = @obj.clone
+
+      o2.should_not.frozen?
+      o3.should.frozen?
+    end
 
-    o2.should_not.frozen?
-    o3.should.frozen?
+    it 'copies frozen?' do
+      o = ''.freeze.clone
+      o.frozen?.should be_true
+    end
   end
 
-  ruby_version_is '3.0' do
-    it 'takes an freeze: true option to frozen copy' do
-      @obj.clone(freeze: true).should.frozen?
+  describe "with freeze: true" do
+    it 'makes a frozen copy if the original is frozen' do
       @obj.freeze
       @obj.clone(freeze: true).should.frozen?
     end
+
+    ruby_version_is ''...'3.0' do
+      it 'does not freeze the copy even if the original is not frozen' do
+        @obj.clone(freeze: true).should_not.frozen?
+      end
+
+      it "calls #initialize_clone with no kwargs" do
+        obj = KernelSpecs::CloneFreeze.new
+        obj.clone(freeze: true)
+        ScratchPad.recorded.should == [obj, {}]
+      end
+    end
+
+    ruby_version_is '3.0' do
+      it 'freezes the copy even if the original was not frozen' do
+        @obj.clone(freeze: true).should.frozen?
+      end
+
+      it "calls #initialize_clone with kwargs freeze: true" do
+        obj = KernelSpecs::CloneFreeze.new
+        obj.clone(freeze: true)
+        ScratchPad.recorded.should == [obj, { freeze: true }]
+      end
+
+      it "calls #initialize_clone with kwargs freeze: true even if #initialize_clone only takes a single argument" do
+        obj = KernelSpecs::Clone.new
+        -> { obj.clone(freeze: true) }.should raise_error(ArgumentError, 'wrong number of arguments (given 2, expected 1)')
+      end
+    end
   end
 
-  it 'takes an freeze: false option to not return frozen copy' do
-    @obj.clone(freeze: false).should_not.frozen?
-    @obj.freeze
-    @obj.clone(freeze: false).should_not.frozen?
+  describe "with freeze: false" do
+    it 'does not freeze the copy if the original is frozen' do
+      @obj.freeze
+      @obj.clone(freeze: false).should_not.frozen?
+    end
+
+    it 'does not freeze the copy if the original is not frozen' do
+      @obj.clone(freeze: false).should_not.frozen?
+    end
+
+    ruby_version_is ''...'3.0' do
+      it "calls #initialize_clone with no kwargs" do
+        obj = KernelSpecs::CloneFreeze.new
+        obj.clone(freeze: false)
+        ScratchPad.recorded.should == [obj, {}]
+      end
+    end
+
+    ruby_version_is '3.0' do
+      it "calls #initialize_clone with kwargs freeze: false" do
+        obj = KernelSpecs::CloneFreeze.new
+        obj.clone(freeze: false)
+        ScratchPad.recorded.should == [obj, { freeze: false }]
+      end
+
+      it "calls #initialize_clone with kwargs freeze: false even if #initialize_clone only takes a single argument" do
+        obj = KernelSpecs::Clone.new
+        -> { obj.clone(freeze: false) }.should raise_error(ArgumentError, 'wrong number of arguments (given 2, expected 1)')
+      end
+    end
   end
 
   it "copies instance variables" do
@@ -114,11 +175,6 @@ def bar
     cloned.bar.should == ['a']
   end
 
-  it 'copies frozen?' do
-    o = ''.freeze.clone
-    o.frozen?.should be_true
-  end
-
   ruby_version_is ''...'2.7' do
     it 'copies tainted?' do
       o = ''.taint.clone

core/kernel/fixtures/classes.rb

@@ -288,7 +288,13 @@ def initialize_copy(other)
 
   class Clone
     def initialize_clone(other)
-      ScratchPad.record other.object_id
+      ScratchPad.record other
+    end
+  end
+
+  class CloneFreeze
+    def initialize_clone(other, **kwargs)
+      ScratchPad.record([other, kwargs])
     end
   end