* test/ruby/test_thread.rb (test_uninitialized, test_backtrace,

test_thread_timer_and_interrupt, test_thread_join_in_trap,
test_thread_join_current, test_thread_join_main_thread,
test_main_thread_status_at_exit, test_thread_status_in_trap,
test_thread_status_raise_after_kill, test_mutex_owned,
test_mutex_owned2): move these tests from TestThreadGroup class
  to TestThread becuase they are not thread group tests.

* test/ruby/test_thread.rb (test_thread_status_raise_after_kill):
  add t.join.

* test/ruby/test_threadgroup.rb: new file. moved ThreadGroup test
  form test_thread.rb.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38388 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_threadgroup.rb

@@ -0,0 +1,55 @@
+require 'test/unit'
+require 'thread'
+require_relative 'envutil'
+
+class TestThreadGroup < Test::Unit::TestCase
+  def test_thread_init
+    thgrp = ThreadGroup.new
+    Thread.new{
+      thgrp.add(Thread.current)
+      assert_equal(thgrp, Thread.new{sleep 1}.group)
+    }.join
+  end
+
+  def test_frozen_thgroup
+    thgrp = ThreadGroup.new
+
+    t = Thread.new{1}
+    Thread.new{
+      thgrp.add(Thread.current)
+      thgrp.freeze
+      assert_raise(ThreadError) do
+        Thread.new{1}.join
+      end
+      assert_raise(ThreadError) do
+        thgrp.add(t)
+      end
+      assert_raise(ThreadError) do
+        ThreadGroup.new.add Thread.current
+      end
+    }.join
+    t.join
+  end
+
+  def test_enclosed_thgroup
+    thgrp = ThreadGroup.new
+    assert_equal(false, thgrp.enclosed?)
+
+    t = Thread.new{1}
+    Thread.new{
+      thgrp.add(Thread.current)
+      thgrp.enclose
+      assert_equal(true, thgrp.enclosed?)
+      assert_nothing_raised do
+        Thread.new{1}.join
+      end
+      assert_raise(ThreadError) do
+        thgrp.add t
+      end
+      assert_raise(ThreadError) do
+        ThreadGroup.new.add Thread.current
+      end
+    }.join
+    t.join
+  end
+end