1 files changed, 115 insertions, 5 deletions
diff --git a/test/ruby/test_variable.rb b/test/ruby/test_variable.rb
index 8726160826..a9b1fd50ff 100644
--- a/test/ruby/test_variable.rb
+++ b/test/ruby/test_variable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 
 class TestVariable < Test::Unit::TestCase
@@ -25,17 +26,23 @@ class TestVariable < Test::Unit::TestCase
   end
 
   class Titans < Gods
-    @@rule = "Cronus"
-    include Olympians           	# OK to cause warning (intentional)
+    @@rule = "Cronus"			# modifies @@rule in Gods
+    include Olympians
+    def ruler4
+      EnvUtil.suppress_warning {
+        @@rule
+      }
+    end
   end
 
   def test_variable
-    assert_instance_of(Fixnum, $$)
-    
+    assert_instance_of(Integer, $$)
+
     # read-only variable
-    assert_raises(NameError) do
+    assert_raise(NameError) do
       $$ = 5
     end
+    assert_normal_exit("$*=0; $*", "[ruby-dev:36698]")
 
     foobar = "foobar"
     $_ = foobar
@@ -49,5 +56,108 @@ class TestVariable < Test::Unit::TestCase
     atlas = Titans.new
     assert_equal("Cronus", atlas.ruler0)
     assert_equal("Zeus", atlas.ruler3)
+    assert_equal("Cronus", atlas.ruler4)
+    assert_nothing_raised do
+      class << Gods
+        defined?(@@rule) && @@rule
+      end
+    end
+  end
+
+  def test_local_variables
+    lvar = 1
+    assert_instance_of(Symbol, local_variables[0], "[ruby-dev:34008]")
+    lvar
+  end
+
+  def test_local_variables2
+    x = 1
+    proc do |y|
+      assert_equal([:x, :y], local_variables.sort)
+    end.call
+    x
+  end
+
+  def test_local_variables3
+    x = 1
+    proc do |y|
+      1.times do |z|
+        assert_equal([:x, :y, :z], local_variables.sort)
+      end
+    end.call
+    x
+  end
+
+  def test_shadowing_local_variables
+    bug9486 = '[ruby-core:60501] [Bug #9486]'
+    assert_equal([:x, :bug9486], tap {|x| break local_variables}, bug9486)
+  end
+
+  def test_shadowing_block_local_variables
+    bug9486 = '[ruby-core:60501] [Bug #9486]'
+    assert_equal([:x, :bug9486], tap {|;x| x = x; break local_variables}, bug9486)
+  end
+
+  def test_global_variables
+    gv = global_variables
+    assert_empty(gv.grep(/\A(?!\$)/))
+    assert_nil($~)
+    assert_not_include(gv, :$1)
+    /(\w)(\d)?(.)(.)(.)(.)(.)(.)(.)(.)(\d)?(.)/ =~ "globalglobalglobal"
+    assert_not_nil($~)
+    gv = global_variables - gv
+    assert_include(gv, :$1)
+    assert_not_include(gv, :$2)
+    assert_not_include(gv, :$11)
+    assert_include(gv, :$12)
+  end
+
+  def test_global_variable_0
+    assert_in_out_err(["-e", "$0='t'*1000;print $0"], "", /\At+\z/, [])
+  end
+
+  def test_global_variable_popped
+    assert_nothing_raised {
+      EnvUtil.suppress_warning {
+        eval("$foo; 1")
+      }
+    }
+  end
+
+  def test_constant_popped
+    assert_nothing_raised {
+      EnvUtil.suppress_warning {
+        eval("TestVariable::Gods; 1")
+      }
+    }
+  end
+
+  def test_special_constant_ivars
+    [ true, false, :symbol, "dsym#{rand(9999)}".to_sym, 1, 1.0 ].each do |v|
+      assert_empty v.instance_variables
+      msg = "can't modify frozen #{v.class}"
+
+      assert_raise_with_message(FrozenError, msg) do
+        v.instance_variable_set(:@foo, :bar)
+      end
+
+      assert_nil EnvUtil.suppress_warning {v.instance_variable_get(:@foo)}
+      assert_not_send([v, :instance_variable_defined?, :@foo])
+
+      assert_raise_with_message(FrozenError, msg) do
+        v.remove_instance_variable(:@foo)
+      end
+    end
+  end
+
+  def test_local_variables_with_kwarg
+    bug11674 = '[ruby-core:71437] [Bug #11674]'
+    v = with_kwargs_11(v1:1,v2:2,v3:3,v4:4,v5:5,v6:6,v7:7,v8:8,v9:9,v10:10,v11:11)
+    assert_equal(%i(v1 v2 v3 v4 v5 v6 v7 v8 v9 v10 v11), v, bug11674)
+  end
+
+  private
+  def with_kwargs_11(v1:, v2:, v3:, v4:, v5:, v6:, v7:, v8:, v9:, v10:, v11:)
+    local_variables
   end
 end