nobu	2018-11-24 21:48:56 +0900 (Sat, 24 Nov 2018)

  New Revision: 65959

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=65959

  Log:
    assertions for r65956

  Modified files:
    trunk/test/ruby/test_string.rb
Index: test/ruby/test_string.rb
===================================================================
--- test/ruby/test_string.rb	(revision 65958)
+++ test/ruby/test_string.rb	(revision 65959)
@@ -987,6 +987,7 @@ CODE https://github.com/ruby/ruby/blob/trunk/test/ruby/test_string.rb#L987
     ].each do |g|
       assert_equal [g], g.each_grapheme_cluster.to_a
       assert_equal 1, g.each_grapheme_cluster.size
+      assert_predicate g.dup.taint.each_grapheme_cluster.to_a[0], :tainted?
     end
 
     [
@@ -996,6 +997,9 @@ CODE https://github.com/ruby/ruby/blob/trunk/test/ruby/test_string.rb#L997
     ].each do |str, grapheme_clusters|
       assert_equal grapheme_clusters, str.each_grapheme_cluster.to_a
       assert_equal grapheme_clusters.size, str.each_grapheme_cluster.size
+      str.dup.taint.each_grapheme_cluster do |g|
+        assert_predicate g, :tainted?
+      end
     end
 
     s = ("x"+"\u{10ABCD}"*250000)
@@ -1016,6 +1020,7 @@ CODE https://github.com/ruby/ruby/blob/trunk/test/ruby/test_string.rb#L1020
       "\u{1f469 200d 2764 fe0f 200d 1f469}",
     ].each do |g|
       assert_equal [g], g.grapheme_clusters
+      assert_predicate g.dup.taint.grapheme_clusters[0], :tainted?
     end
 
     assert_equal ["\u000A", "\u0308"], "\u{a 308}".grapheme_clusters
@@ -1029,12 +1034,14 @@ CODE https://github.com/ruby/ruby/blob/trunk/test/ruby/test_string.rb#L1034
     else
       warning = /passing a block to String#grapheme_clusters is deprecated/
       assert_warning(warning) {
-        s = "ABC".b
+        s = "ABC".b.taint
         res = []
         assert_same s, s.grapheme_clusters {|x| res << x }
+        assert_equal(3, res.size)
         assert_equal("A", res[0])
         assert_equal("B", res[1])
         assert_equal("C", res[2])
+        res.each {|g| assert_predicate(g, :tainted?)}
       }
     end
   end

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