Enable unit test framework in experimental branch.

Change-Id: I27c98025b2857e2911005a52dd57c46e2524e815
diff --git a/test/test_libvpx.cc b/test/test_libvpx.cc
new file mode 100644
index 0000000..9b9e08c
--- /dev/null
+++ b/test/test_libvpx.cc
@@ -0,0 +1,46 @@
+/*
+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include <string>
+#include "vpx_config.h"
+#if ARCH_X86 || ARCH_X86_64
+extern "C" {
+#include "vpx_ports/x86.h"
+}
+#endif
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
+static void append_gtest_filter(const char *str)
+{
+  std::string filter = ::testing::FLAGS_gtest_filter;
+  filter += str;
+  ::testing::FLAGS_gtest_filter = filter;
+}
+
+int main(int argc, char **argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+
+#if ARCH_X86 || ARCH_X86_64
+  int simd_caps = x86_simd_caps();
+  if(!(simd_caps & HAS_MMX))
+    append_gtest_filter(":-MMX/*");
+  if(!(simd_caps & HAS_SSE))
+    append_gtest_filter(":-SSE/*");
+  if(!(simd_caps & HAS_SSE2))
+    append_gtest_filter(":-SSE2/*");
+  if(!(simd_caps & HAS_SSE3))
+    append_gtest_filter(":-SSE3/*");
+  if(!(simd_caps & HAS_SSSE3))
+    append_gtest_filter(":-SSSE3/*");
+  if(!(simd_caps & HAS_SSE4_1))
+    append_gtest_filter(":-SSE4_1/*");
+#endif
+
+  return RUN_ALL_TESTS();
+}