Skip the failing tests on Rubinius for now

actionpack/test/controller/live_stream_test.rb

@@ -276,6 +276,8 @@ module ActionController
     end
 
     def test_async_stream
+      rubinius_skip "https://github.com/rubinius/rubinius/issues/2934"
+
       @controller.latch = ActiveSupport::Concurrency::Latch.new
       parts             = ['hello', 'world']
 

activemodel/test/cases/attribute_assignment_test.rb

@@ -58,6 +58,8 @@ class AttributeAssignmentTest < ActiveModel::TestCase
   end
 
   test "assign private attribute" do
+    rubinius_skip "https://github.com/rubinius/rubinius/issues/3328"
+
     model = Model.new
     assert_raises(ActiveModel::AttributeAssignment::UnknownAttributeError) do
       model.assign_attributes(metadata: { a: 1 })

activesupport/test/core_ext/object/duplicable_test.rb

@@ -9,6 +9,9 @@ class DuplicableTest < ActiveSupport::TestCase
   ALLOW_DUP << BigDecimal.new('4.56')
 
   def test_duplicable
+    rubinius_skip "* Method#dup is allowed at the moment on Rubinius\n" \
+                  "* https://github.com/rubinius/rubinius/issues/3089"
+
     RAISE_DUP.each do |v|
       assert !v.duplicable?
       assert_raises(TypeError, v.class.name) { v.dup }

activesupport/test/json/encoding_test.rb

@@ -130,6 +130,8 @@ class TestJSONEncoding < ActiveSupport::TestCase
   end
 
   def test_process_status
+    rubinius_skip "https://github.com/rubinius/rubinius/issues/3334"
+
     # There doesn't seem to be a good way to get a handle on a Process::Status object without actually
     # creating a child process, hence this to populate $?
     system("not_a_real_program_#{SecureRandom.hex}")