1 files changed, 34 insertions, 4 deletions
diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index 48e074750f..5a646cf8de 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -13,16 +13,46 @@ if defined? Zlib
     def test_read0
       assert_equal("", Zlib::GzipReader.new(StringIO.new(D0)).read(0))
     end
+
+    def test_ungetc # [ruby-dev:24060]
+      s = ""
+      w = Zlib::GzipWriter.new(StringIO.new(s))
+      w << (1...1000).to_a.inspect
+      w.close
+      r = Zlib::GzipReader.new(StringIO.new(s))
+      r.read(100)
+      r.ungetc ?a
+      assert_nothing_raised {
+        r.read(100)
+        r.read
+        r.close
+      }
+    end
+
+    def test_ungetc_paragraph # [ruby-dev:24065]
+      s = ""
+      w = Zlib::GzipWriter.new(StringIO.new(s))
+      w << "abc"
+      w.close
+      r = Zlib::GzipReader.new(StringIO.new(s))
+      $/ = ""
+      r.ungetc ?\n
+      assert_equal("abc", r.gets)
+      assert_nothing_raised {
+        r.read
+        r.close
+      }
+    end
   end
 
   class TestZlibGzipWriter < Test::Unit::TestCase
     def test_invalid_new
       # [ruby-dev:23228]
-      assert_raises(NoMethodError) { Zlib::GzipWriter.new(nil).close }
+      assert_raise(NoMethodError) { Zlib::GzipWriter.new(nil).close }
       # [ruby-dev:23344]
-      assert_raises(NoMethodError) { Zlib::GzipWriter.new(true).close }
-      assert_raises(NoMethodError) { Zlib::GzipWriter.new(0).close }
-      assert_raises(NoMethodError) { Zlib::GzipWriter.new(:hoge).close }
+      assert_raise(NoMethodError) { Zlib::GzipWriter.new(true).close }
+      assert_raise(NoMethodError) { Zlib::GzipWriter.new(0).close }
+      assert_raise(NoMethodError) { Zlib::GzipWriter.new(:hoge).close }
     end
   end
 end