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diff --git a/web/server/h2o/libh2o/deps/mruby/test/t/numeric.rb b/web/server/h2o/libh2o/deps/mruby/test/t/numeric.rb
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+##
+# Numeric ISO Test
+
+assert('Numeric', '15.2.7') do
+  assert_equal Class, Numeric.class
+end
+
+assert('Numeric#+@', '15.2.7.4.1') do
+  assert_equal(+1, +1)
+end
+
+assert('Numeric#-@', '15.2.7.4.2') do
+  assert_equal(-1, -1)
+end
+
+assert('Numeric#abs', '15.2.7.4.3') do
+  assert_equal(1, 1.abs)
+  assert_equal(1.0, -1.abs)
+end
+
+assert('Numeric#pow') do
+  assert_equal(8, 2 ** 3)
+  assert_equal(-8, -2 ** 3)
+  assert_equal(1, 2 ** 0)
+  assert_equal(1, 2.2 ** 0)
+  assert_equal(0.5, 2 ** -1)
+end
+
+assert('Numeric#/', '15.2.8.3.4') do
+  n = Class.new(Numeric){ def /(x); 15.1;end }.new
+
+  assert_equal(2, 10/5)
+  assert_equal(0.0625, 1/16)
+  assert_equal(15.1, n/10)
+  assert_raise(TypeError){ 1/n }
+  assert_raise(TypeError){ 1/nil }
+end
+
+# Not ISO specified
+
+assert('Numeric#**') do
+  assert_equal 8.0, 2.0**3
+end