1 files changed, 12 insertions, 0 deletions
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index 498f93aec4..1c7e89c265 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -227,6 +227,10 @@ class TestSprintf < Test::Unit::TestCase
 
     bug11766 = '[ruby-core:71806] [Bug #11766]'
     assert_equal("x"*10+"     1.0", sprintf("x"*10+"%8.1f", 1r), bug11766)
+
+    require 'rbconfig/sizeof'
+    fmin, fmax = RbConfig::LIMITS.values_at("FIXNUM_MIN", "FIXNUM_MAX")
+    assert_match(/\A-\d+\.\d+\z/, sprintf("%f", Rational(fmin, fmax)))
   end
 
   def test_rational_precision
@@ -542,4 +546,12 @@ class TestSprintf < Test::Unit::TestCase
       sprintf("%*s", RbConfig::LIMITS["INT_MIN"], "")
     end
   end
+
+  def test_binary_format_coderange
+    1.upto(500) do |i|
+      str = sprintf("%*s".b, i, "\xe2".b)
+      refute_predicate str, :ascii_only?
+      assert_equal i, str.bytesize
+    end
+  end
 end