1 files changed, 11 insertions, 8 deletions
diff --git a/mrbgems/mruby-numeric-ext/test/numeric.rb b/mrbgems/mruby-numeric-ext/test/numeric.rb
index 96644da69..efdf25a34 100644
--- a/mrbgems/mruby-numeric-ext/test/numeric.rb
+++ b/mrbgems/mruby-numeric-ext/test/numeric.rb
@@ -1,18 +1,21 @@
 ##
 # Numeric(Ext) Test
 
-assert('Integer#chr') do
-  assert_equal("A", 65.chr)
-  assert_equal("B", 0x42.chr)
-
-  # multibyte encoding (not support yet)
-  assert_raise(RangeError) { 256.chr }
-end
-
 assert('Integer#div') do
   assert_equal 52, 365.div(7)
 end
 
 assert('Float#div') do
+  skip unless Object.const_defined?(:Float)
   assert_float 52, 365.2425.div(7)
 end
+
+assert('Integer#zero?') do
+  assert_equal true, 0.zero?
+  assert_equal false, 1.zero?
+end
+
+assert('Integer#nonzero?') do
+  assert_equal nil, 0.nonzero?
+  assert_equal 1000, 1000.nonzero?
+end