1 files changed, 24 insertions, 0 deletions
diff --git a/test/-ext-/test_printf.rb b/test/-ext-/test_printf.rb
new file mode 100644
index 0000000000..f801030c07
--- /dev/null
+++ b/test/-ext-/test_printf.rb
@@ -0,0 +1,24 @@
+require 'test/unit'
+require "-test-/printf"
+
+class Test_SPrintf < Test::Unit::TestCase
+  def to_s
+    "#{self.class}:#{object_id}"
+  end
+
+  def inspect
+    "<#{self.class}:#{object_id}>"
+  end
+
+  def test_int
+    assert_match(/\A<-?\d+>\z/, Bug::Printf.i(self))
+  end
+
+  def test_to_str
+    assert_equal("<#{self.class}:#{object_id}>", Bug::Printf.s(self))
+  end
+
+  def test_inspect
+    assert_equal("{<#{self.class}:#{object_id}>}", Bug::Printf.v(self))
+  end
+end