Add specs for [Feature #13983] Rational and Complex should be frozen

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/kernel/freeze_spec.rb

@@ -51,6 +51,24 @@ describe "Kernel#freeze" do
     end
   end
 
+  ruby_version_is "2.5" do
+    describe "on a Complex" do
+      it "has no effect since it is already frozen" do
+        c = Complex(1.3, 3.1)
+        c.frozen?.should be_true
+        c.freeze
+      end
+    end
+
+    describe "on a Rational" do
+      it "has no effect since it is already frozen" do
+        r = Rational(1, 3)
+        r.frozen?.should be_true
+        r.freeze
+      end
+    end
+  end
+
   it "causes mutative calls to raise RuntimeError" do
     o = Class.new do
       def mutate; @foo = 1; end

spec/ruby/core/kernel/frozen_spec.rb

@@ -49,4 +49,30 @@ describe "Kernel#frozen?" do
       @symbol.frozen?.should be_true
     end
   end
+
+  ruby_version_is "2.5" do
+    describe "on a Complex" do
+      it "returns true" do
+        c = Complex(1.3, 3.1)
+        c.frozen?.should be_true
+      end
+
+      it "literal returns true" do
+        c = eval "1.3i"
+        c.frozen?.should be_true
+      end
+    end
+
+    describe "on a Rational" do
+      it "returns true" do
+        r = Rational(1, 3)
+        r.frozen?.should be_true
+      end
+
+      it "literal returns true" do
+        r = eval "1/3r"
+        r.frozen?.should be_true
+      end
+    end
+  end
 end

spec/ruby/core/kernel/shared/dup_clone.rb

@@ -122,4 +122,28 @@ describe :kernel_dup_clone, shared: true do
       :my_symbol.send(@method).should == :my_symbol
     end
   end
+
+  ruby_version_is ''...'2.5' do
+    it "raises a TypeError for Complex" do
+      c = Complex(1.3, 3.1)
+      lambda { c.send(@method) }.should raise_error(TypeError)
+    end
+
+    it "raises a TypeError for Rational" do
+      r = Rational(1, 3)
+      lambda { r.send(@method) }.should raise_error(TypeError)
+    end
+  end
+
+  ruby_version_is '2.5' do
+    it "returns self for Complex" do
+      c = Complex(1.3, 3.1)
+      c.send(@method).should equal c
+    end
+
+    it "returns self for Rational" do
+      r = Rational(1, 3)
+      r.send(@method).should equal r
+    end
+  end
 end