1 files changed, 22 insertions, 0 deletions
diff --git a/mrbgems/mruby-symbol-ext/test/symbol.rb b/mrbgems/mruby-symbol-ext/test/symbol.rb
index 741315d74..35bb31aef 100644
--- a/mrbgems/mruby-symbol-ext/test/symbol.rb
+++ b/mrbgems/mruby-symbol-ext/test/symbol.rb
@@ -10,3 +10,25 @@ assert('Symbol.all_symbols') do
   symbols = Symbol.all_symbols.select{|sym|sym.to_s.include? '__symbol_test'}.sort
   assert_equal foo, symbols
 end
+
+assert("Symbol#length") do
+  assert_equal 5, :hello.size
+  assert_equal 5, :mruby.length
+end
+
+assert("Symbol#capitalize") do
+  assert_equal :Hello, :hello.capitalize
+  assert_equal :Hello, :HELLO.capitalize
+end
+
+assert("Symbol#downcase") do
+  assert_equal :hello, :hEllO.downcase
+end
+
+assert("Symbol#upcase") do
+  assert_equal :HELLO, :hEllO.upcase
+end
+
+assert("Symbol#empty?") do
+  assert_true :''.empty?
+end