1 files changed, 34 insertions, 0 deletions
diff --git a/spec/rubyspec/core/symbol/swapcase_spec.rb b/spec/rubyspec/core/symbol/swapcase_spec.rb
new file mode 100644
index 0000000000..fdc42ec477
--- /dev/null
+++ b/spec/rubyspec/core/symbol/swapcase_spec.rb
@@ -0,0 +1,34 @@
+# -*- encoding: utf-8 -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Symbol#swapcase" do
+  it "returns a Symbol" do
+    :glark.swapcase.should be_an_instance_of(Symbol)
+  end
+
+  it "converts lowercase ASCII characters to their uppercase equivalents" do
+    :lower.swapcase.should == :LOWER
+  end
+
+  it "converts uppercase ASCII characters to their lowercase equivalents" do
+    :UPPER.swapcase.should == :upper
+  end
+
+  it "works with both upper- and lowercase ASCII characters in the same Symbol" do
+    :mIxEd.swapcase.should == :MiXeD
+  end
+
+  ruby_version_is ''...'2.4' do
+    it "leaves uppercase Unicode characters as they were" do
+      "\u{00DE}Bc".to_sym.swapcase.should == :"ÞbC"
+    end
+
+    it "leaves lowercase Unicode characters as they were" do
+      "\u{00DF}Bc".to_sym.swapcase.should == :"ßbC"
+    end
+  end
+
+  it "leaves non-alphabetic ASCII characters as they were" do
+    "Glark?!?".to_sym.swapcase.should == :"gLARK?!?"
+  end
+end