* test/ruby: tests for ruby itself.

* test/ruby/test_*.rb: split sample/test.rb into 28 test/unit testcases.  some
  tests could not be translates...  search '!!' mark to see it.

* test/csv/test_csv.rb: should require 'csv', not '../lib/csv'.  test runner
  should set load path correctly.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4498 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_variable.rb

@@ -0,0 +1,58 @@
+require 'test/unit'
+
+$KCODE = 'none'
+
+class TestVariable < Test::Unit::TestCase
+  class Gods
+    @@rule = "Uranus"
+    def ruler0
+      @@rule
+    end
+
+    def self.ruler1		# <= per method definition style
+      @@rule
+    end		   
+    class << self			# <= multiple method definition style
+      def ruler2
+	@@rule
+      end
+    end
+  end
+
+  module Olympians
+    @@rule ="Zeus"
+    def ruler3
+      @@rule
+    end
+  end
+
+  class Titans < Gods
+    @@rule = "Cronus"
+    include Olympians           	# OK to cause warning (intentional)
+  end
+
+  def test_variable
+    assert($$.instance_of?(Fixnum))
+    
+    # read-only variable
+    begin
+      $$ = 5
+      assert false
+    rescue NameError
+      assert true
+    end
+    
+    foobar = "foobar"
+    $_ = foobar
+    assert($_ == foobar)
+
+    assert(Gods.new.ruler0 == "Cronus")
+    assert(Gods.ruler1 == "Cronus")
+    assert(Gods.ruler2 == "Cronus")
+    assert(Titans.ruler1 == "Cronus")
+    assert(Titans.ruler2 == "Cronus")
+    atlas = Titans.new
+    assert(atlas.ruler0 == "Cronus")
+    assert(atlas.ruler3 == "Zeus")
+  end
+end