test_thread.rb: move thread switch test

* test/ruby/test_thread.rb (test_switch_while_busy_loop): move
  from test/test_timeout.rb.  [Bug #1402]

* test/test_timeout.rb (test_timeout): no longer related to
  [Bug #1402].  [Bug #8523]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46196 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_thread.rb

@@ -369,6 +369,24 @@ class TestThread < Test::Unit::TestCase
     c.kill if c
   end
 
+  def test_switch_while_busy_loop
+    bug1402 = "[ruby-dev:38319] [Bug #1402]"
+    flag = true
+    th = Thread.current
+    waiter = Thread.start {
+      sleep 0.1
+      flag = false
+      sleep 1
+      th.raise(bug1402)
+    }
+    assert_nothing_raised(RuntimeError, bug1402) do
+      nil while flag
+    end
+    assert(!flag, bug1402)
+  ensure
+    waiter.kill.join
+  end
+
   def test_safe_level
     ok = false
     t = Thread.new do

test/test_timeout.rb

@@ -11,17 +11,11 @@ class TestTimeout < Test::Unit::TestCase
   end
 
   def test_timeout
-    flag = true
-    Thread.start {
-      sleep 1
-      flag = false
-    }
-    assert_raise(Timeout::Error, "[ruby-dev:38319]") do
+    assert_raise(Timeout::Error) do
       Timeout.timeout(0.1) {
-        Thread.pass while flag
+        nil while true
       }
     end
-    assert flag, "[ruby-dev:38319]"
   end
 
   def test_cannot_convert_into_time_interval