Update to ruby/spec@4bb0f25

* Specs added by TruffleRuby.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63654 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/string/swapcase_spec.rb

@@ -23,8 +23,61 @@ describe "String#swapcase" do
   end
 
   ruby_version_is '2.4' do
-    it "works for all of Unicode" do
-      "äÖü".swapcase.should == "ÄöÜ"
+    describe "full Unicode case mapping" do
+      it "works for all of Unicode with no option" do
+        "äÖü".swapcase.should == "ÄöÜ"
+      end
+
+      it "updates string metadata" do
+        swapcased = "Aßet".swapcase
+
+        swapcased.should == "aSSET"
+        swapcased.size.should == 5
+        swapcased.bytesize.should == 5
+        swapcased.ascii_only?.should be_true
+      end
+    end
+
+    describe "ASCII-only case mapping" do
+      it "does not swapcase non-ASCII characters" do
+        "aßet".swapcase(:ascii).should == "AßET"
+      end
+    end
+
+    describe "full Unicode case mapping adapted for Turkic languages" do
+      it "swaps case of ASCII characters according to Turkic semantics" do
+        "aiS".swapcase(:turkic).should == "Aİs"
+      end
+
+      it "allows Lithuanian as an extra option" do
+        "aiS".swapcase(:turkic, :lithuanian).should == "Aİs"
+      end
+
+      it "does not allow any other additional option" do
+        lambda { "aiS".swapcase(:turkic, :ascii) }.should raise_error(ArgumentError)
+      end
+    end
+
+    describe "full Unicode case mapping adapted for Lithuanian" do
+      it "currently works the same as full Unicode case mapping" do
+        "Iß".swapcase(:lithuanian).should == "iSS"
+      end
+
+      it "allows Turkic as an extra option (and applies Turkic semantics)" do
+        "iS".swapcase(:lithuanian, :turkic).should == "İs"
+      end
+
+      it "does not allow any other additional option" do
+        lambda { "aiS".swapcase(:lithuanian, :ascii) }.should raise_error(ArgumentError)
+      end
+    end
+
+    it "does not allow the :fold option for upcasing" do
+      lambda { "abc".swapcase(:fold) }.should raise_error(ArgumentError)
+    end
+
+    it "does not allow invalid options" do
+      lambda { "abc".swapcase(:invalid_option) }.should raise_error(ArgumentError)
     end
   end
 
@@ -42,10 +95,74 @@ describe "String#swapcase!" do
   end
 
   ruby_version_is '2.4' do
-    it "modifies self in place for all of Unicode" do
-      a = "äÖü"
-      a.swapcase!.should equal(a)
-      a.should == "ÄöÜ"
+    describe "full Unicode case mapping" do
+      it "modifies self in place for all of Unicode with no option" do
+        a = "äÖü"
+        a.swapcase!
+        a.should == "ÄöÜ"
+      end
+
+      it "updates string metadata" do
+        swapcased = "Aßet"
+        swapcased.swapcase!
+
+        swapcased.should == "aSSET"
+        swapcased.size.should == 5
+        swapcased.bytesize.should == 5
+        swapcased.ascii_only?.should be_true
+      end
+    end
+
+    describe "modifies self in place for ASCII-only case mapping" do
+      it "does not swapcase non-ASCII characters" do
+        a = "aßet"
+        a.swapcase!(:ascii)
+        a.should == "AßET"
+      end
+    end
+
+    describe "modifies self in place for full Unicode case mapping adapted for Turkic languages" do
+      it "swaps case of ASCII characters according to Turkic semantics" do
+        a = "aiS"
+        a.swapcase!(:turkic)
+        a.should == "Aİs"
+      end
+
+      it "allows Lithuanian as an extra option" do
+        a = "aiS"
+        a.swapcase!(:turkic, :lithuanian)
+        a.should == "Aİs"
+      end
+
+      it "does not allow any other additional option" do
+        lambda { a = "aiS"; a.swapcase!(:turkic, :ascii) }.should raise_error(ArgumentError)
+      end
+    end
+
+    describe "full Unicode case mapping adapted for Lithuanian" do
+      it "currently works the same as full Unicode case mapping" do
+        a = "Iß"
+        a.swapcase!(:lithuanian)
+        a.should == "iSS"
+      end
+
+      it "allows Turkic as an extra option (and applies Turkic semantics)" do
+        a = "iS"
+        a.swapcase!(:lithuanian, :turkic)
+        a.should == "İs"
+      end
+
+      it "does not allow any other additional option" do
+        lambda { a = "aiS"; a.swapcase!(:lithuanian, :ascii) }.should raise_error(ArgumentError)
+      end
+    end
+
+    it "does not allow the :fold option for upcasing" do
+      lambda { a = "abc"; a.swapcase!(:fold) }.should raise_error(ArgumentError)
+    end
+
+    it "does not allow invalid options" do
+      lambda { a = "abc"; a.swapcase!(:invalid_option) }.should raise_error(ArgumentError)
     end
   end