Index: crypto/random_unittest.cc |
diff --git a/crypto/random_unittest.cc b/crypto/random_unittest.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b2e2d2cf0e77f0607536709973e2b7ccf35d698f |
--- /dev/null |
+++ b/crypto/random_unittest.cc |
@@ -0,0 +1,27 @@ |
+// Copyright (c) 2012 The Chromium 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 "crypto/random.h" |
+ |
+#include "base/string_util.h" |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+// Basic functionality tests. Does NOT test the security of the random data. |
+ |
+// Ensures we don't have all trivial data, i.e. that the data is indeed random. |
+// Currently, that means the bytes cannot be all the same (e.g. all zeros). |
+bool IsTrivial(const std::string& bytes) { |
+ for (size_t i = 0; i < bytes.size(); i++) { |
+ if (bytes[i] != bytes[0]) { |
+ return false; |
+ } |
+ } |
+ return true; |
+} |
+ |
+TEST(RandBytes, RandBytes) { |
+ std::string bytes(16, '\0'); |
+ crypto::RandBytes(WriteInto(&bytes, bytes.size()), bytes.size()); |
+ EXPECT_TRUE(!IsTrivial(bytes)); |
+} |