Reinstate tests

I'm using a 64 node 0.8.16 and these work for me:

````
batavia:emscripten bruce (incoming) $ file /usr/local/bin/node
/usr/local/bin/node: Mach-O 64-bit executable x86_64
batavia:emscripten bruce (incoming) $ node -v
v0.8.16
````