1 files changed, 19 insertions, 15 deletions
diff --git a/test/t/kernel.rb b/test/t/kernel.rb
index 7fc8cd2e7..c2eeee1a5 100644
--- a/test/t/kernel.rb
+++ b/test/t/kernel.rb
@@ -31,10 +31,6 @@ end
 
 # Kernel.eval is provided by the mruby-gem mrbgem. '15.3.1.2.3'
 
-assert('Kernel.global_variables', '15.3.1.2.4') do
-  assert_equal Array, Kernel.global_variables.class
-end
-
 assert('Kernel.iterator?', '15.3.1.2.5') do
   assert_false Kernel.iterator?
 end
@@ -92,6 +88,20 @@ assert('Kernel#__id__', '15.3.1.3.3') do
   assert_equal Fixnum, __id__.class
 end
 
+assert('Kernel#__send__', '15.3.1.3.4') do
+  # test with block
+  l = __send__(:lambda) do
+    true
+  end
+
+  assert_true l.call
+  assert_equal Proc, l.class
+  # test with argument
+  assert_true __send__(:respond_to?, :nil?)
+  # test without argument and without block
+  assert_equal String, __send__(:to_s).class
+end
+
 assert('Kernel#block_given?', '15.3.1.3.6') do
   def bg_try(&b)
     if block_given?
@@ -230,6 +240,9 @@ assert('Kernel#extend', '15.3.1.3.13') do
 
   assert_true a.respond_to?(:test_method)
   assert_false b.respond_to?(:test_method)
+
+  assert_raise(FrozenError) { Object.new.freeze.extend(Test4ExtendModule) }
+  assert_raise(FrozenError, TypeError) { :sym.extend(Test4ExtendModule) }
 end
 
 assert('Kernel#extend works on toplevel', '15.3.1.3.13') do
@@ -266,10 +279,6 @@ assert('Kernel#frozen?') do
   assert_true 0.0.frozen?
 end
 
-assert('Kernel#global_variables', '15.3.1.3.14') do
-  assert_equal Array, global_variables.class
-end
-
 assert('Kernel#hash', '15.3.1.3.15') do
   assert_equal hash, hash
 end
@@ -410,6 +419,8 @@ assert('Kernel#remove_instance_variable', '15.3.1.3.41') do
   assert_equal nil, tri.var
   assert_raise(NameError) { tri.remove }
   assert_raise(NameError) { tri.remove_instance_variable(:var) }
+  assert_raise(FrozenError) { tri.freeze.remove }
+  assert_raise(FrozenError, NameError) { :a.remove_instance_variable(:@v) }
 end
 
 # Kernel#require is defined in mruby-require. '15.3.1.3.42'
@@ -486,13 +497,6 @@ assert('Kernel#respond_to_missing?') do
   assert_false Test4RespondToMissing.new.respond_to?(:no_method)
 end
 
-assert('Kernel#global_variables') do
-  variables = global_variables
-  1.upto(9) do |i|
-    assert_equal variables.include?(:"$#{i}"), true
-  end
-end
-
 assert('stack extend') do
   def recurse(count, stop)
     return count if count > stop