1 files changed, 35 insertions, 0 deletions
diff --git a/mrbgems/mruby-kernel-ext/test/kernel.rb b/mrbgems/mruby-kernel-ext/test/kernel.rb
index 0e47e3b57..c58fb465c 100644
--- a/mrbgems/mruby-kernel-ext/test/kernel.rb
+++ b/mrbgems/mruby-kernel-ext/test/kernel.rb
@@ -16,3 +16,38 @@ assert('Kernel#__method__') do
   assert_equal(:m1, c.new.m1)
   assert_equal(:m2, c.new.m2)
 end
+
+assert('Kernel#Integer') do
+  assert_equal(123, Integer(123.999))
+  assert_equal(26, Integer("0x1a"))
+  assert_equal(930, Integer("0930", 10))
+  assert_equal(7, Integer("111", 2))
+  assert_raise(TypeError) { Integer(nil) }
+end
+
+assert('Kernel#Float') do
+  assert_equal(1.0, Float(1))
+  assert_equal(123.456, Float(123.456))
+  assert_equal(123.456, Float("123.456"))
+  assert_raise(TypeError) { Float(nil) }
+end
+
+assert('Kernel#String') do
+  assert_equal("main", String(self))
+  assert_equal("Object", String(self.class))
+  assert_equal("123456", String(123456))
+end
+
+assert('Kernel#Array') do
+  assert_equal([1], Kernel.Array(1))
+  assert_equal([1, 2, 3, 4, 5], Kernel.Array([1, 2, 3, 4, 5]))
+  assert_equal([1, 2, 3, 4, 5], Kernel.Array(1..5))
+  assert_equal([[:a, 1], [:b, 2], [:c, 3]], Kernel.Array({a:1, b:2, c:3}))
+end
+
+assert('Kernel#Hash') do
+  assert_equal({}, Hash([]))
+  assert_equal({}, Hash(nil))
+  assert_equal({:key => :value}, Hash(key: :value))
+  assert_raise(TypeError) { Hash([1, 2, 3]) }
+end