test/lib_read_write.rb in kgio-2.1.1 vs test/lib_read_write.rb in kgio-2.2.0

@@ -8,12 +8,20 @@
 module LibReadWriteTest
   RANDOM_BLOB = File.open("/dev/urandom") { |fp| fp.read(10 * 1024 * 1024) }
 
   def teardown
     assert_nothing_raised do
-      @rd.close unless @rd.closed?
-      @wr.close unless @wr.closed?
+      @rd.close if defined?(@rd) && ! @rd.closed?
+      @wr.close if defined?(@wr) && ! @wr.closed?
     end
+  end
+
+  def test_write_empty
+    assert_nil @wr.kgio_write("")
+  end
+
+  def test_trywrite_empty
+    assert_nil @wr.kgio_trywrite("")
   end
 
   def test_read_zero
     assert_equal "", @rd.kgio_read(0)
     buf = "foo"