1 files changed, 16 insertions, 16 deletions
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index 7986e9d141..c453ecd350 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -362,11 +362,16 @@ class TestSprintf < Test::Unit::TestCase
   def test_char
     assert_equal("a", sprintf("%c", 97))
     assert_equal("a", sprintf("%c", ?a))
-    assert_raise(ArgumentError) { sprintf("%c", sprintf("%c%c", ?a, ?a)) }
+    assert_equal("a", sprintf("%c", "a"))
+    assert_equal("a", sprintf("%c", sprintf("%c%c", ?a, ?a)))
     assert_equal(" " * (BSIZ - 1) + "a", sprintf(" " * (BSIZ - 1) + "%c", ?a))
     assert_equal(" " * (BSIZ - 1) + "a", sprintf(" " * (BSIZ - 1) + "%-1c", ?a))
     assert_equal(" " * BSIZ + "a", sprintf("%#{ BSIZ + 1 }c", ?a))
     assert_equal("a" + " " * BSIZ, sprintf("%-#{ BSIZ + 1 }c", ?a))
+    assert_raise(ArgumentError) { sprintf("%c", -1) }
+    s = sprintf("%c".encode(Encoding::US_ASCII), 0x80)
+    assert_equal("\x80".b, s)
+    assert_predicate(s, :valid_encoding?)
   end
 
   def test_string
@@ -507,6 +512,16 @@ class TestSprintf < Test::Unit::TestCase
     end
   end
 
+  def test_coderange
+    format_str = "wrong constant name %s"
+    interpolated_str = "\u3042"
+    assert_predicate format_str, :ascii_only?
+    refute_predicate interpolated_str, :ascii_only?
+
+    str = format_str % interpolated_str
+    refute_predicate str, :ascii_only?
+  end
+
   def test_named_default
     h = Hash.new('world')
     assert_equal("hello world", "hello %{location}" % h)
@@ -528,19 +543,4 @@ class TestSprintf < Test::Unit::TestCase
       sprintf("%*s", RbConfig::LIMITS["INT_MIN"], "")
     end
   end
-
-  def test_no_hidden_garbage
-    skip unless Thread.list.size == 1
-
-    fmt = [4, 2, 2].map { |x| "%0#{x}d" }.join('-') # defeats optimization
-    ObjectSpace.count_objects(res = {}) # creates strings on first call
-    GC.disable
-    before = ObjectSpace.count_objects(res)[:T_STRING]
-    val = sprintf(fmt, 1970, 1, 1)
-    after = ObjectSpace.count_objects(res)[:T_STRING]
-    assert_equal before + 1, after, 'only new string is the created one'
-    assert_equal '1970-01-01', val
-  ensure
-    GC.enable
-  end
 end