Added a test for Gzip

activesupport/test/gzip_test.rb

@@ -0,0 +1,7 @@
+require 'abstract_unit'
+
+class GzipTest < Test::Unit::TestCase
+  def test_compress_should_decompress_to_the_same_value
+    assert_equal "Hello World", ActiveSupport::Gzip.decompress(ActiveSupport::Gzip.compress("Hello World"))
+  end
+end