1 files changed, 15 insertions, 0 deletions
diff --git a/test/lib/assert_warning.rb b/test/lib/assert_warning.rb
new file mode 100644
index 0000000..828b464
--- /dev/null
+++ b/test/lib/assert_warning.rb
@@ -0,0 +1,15 @@
+class Test::Unit::TestCase
+  
+  def assert_warning expected_warning
+    require 'stringio'
+    oldstderr = $stderr
+    $stderr = StringIO.new
+    yield
+    $stderr.rewind
+    given_warning = $stderr.read.chomp
+    assert_equal expected_warning, given_warning
+  ensure
+    $stderr = oldstderr
+  end
+  
+end