diff --git a/chromeos/data_encoding_unittest.cc b/chromeos/data_encoding_unittest.cc
new file mode 100644
index 0000000..a09b09e
--- /dev/null
+++ b/chromeos/data_encoding_unittest.cc
@@ -0,0 +1,43 @@
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <chromeos/data_encoding.h>
+
+#include <gtest/gtest.h>
+
+namespace chromeos {
+namespace data_encoding {
+
+TEST(data_encoding, UrlEncoding) {
+  std::string test = "\"http://sample/path/0014.html \"";
+  std::string encoded = UrlEncode(test.c_str());
+  EXPECT_EQ("%22http%3A%2F%2Fsample%2Fpath%2F0014.html+%22",
+            encoded);
+  EXPECT_EQ(test, UrlDecode(encoded.c_str()));
+
+  test = "\"http://sample/path/0014.html \"";
+  encoded = UrlEncode(test.c_str(), false);
+  EXPECT_EQ("%22http%3A%2F%2Fsample%2Fpath%2F0014.html%20%22",
+            encoded);
+  EXPECT_EQ(test, UrlDecode(encoded.c_str()));
+}
+
+TEST(data_encoding, WebParamsEncoding) {
+  std::string encoded = WebParamsEncode({{"q", "test"},
+                                         {"path", "/usr/bin"},
+                                         {"#", "%"}});
+  EXPECT_EQ("q=test&path=%2Fusr%2Fbin&%23=%25", encoded);
+
+  auto params = WebParamsDecode(encoded);
+  EXPECT_EQ(3, params.size());
+  EXPECT_EQ("q", params[0].first);
+  EXPECT_EQ("test", params[0].second);
+  EXPECT_EQ("path", params[1].first);
+  EXPECT_EQ("/usr/bin", params[1].second);
+  EXPECT_EQ("#", params[2].first);
+  EXPECT_EQ("%", params[2].second);
+}
+
+}  // namespace data_encoding
+}  // namespace chromeos