1 files changed, 22 insertions, 0 deletions
diff --git a/spec/ruby/core/symbol/upcase_spec.rb b/spec/ruby/core/symbol/upcase_spec.rb
new file mode 100644
index 0000000000..fce62af100
--- /dev/null
+++ b/spec/ruby/core/symbol/upcase_spec.rb
@@ -0,0 +1,22 @@
+# -*- encoding: utf-8 -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Symbol#upcase" do
+  it "returns a Symbol" do
+    :glark.upcase.should be_an_instance_of(Symbol)
+  end
+
+  it "converts lowercase ASCII characters to their uppercase equivalents" do
+    :lOwEr.upcase.should == :LOWER
+  end
+
+  ruby_version_is ''...'2.4' do
+    it "leaves lowercase Unicode characters as they were" do
+      "\u{E0}Bc".to_sym.upcase.should == :"àBC"
+    end
+  end
+
+  it "leaves non-alphabetic ASCII characters as they were" do
+    "Glark?!?".to_sym.upcase.should == :"GLARK?!?"
+  end
+end