Improvement/nginx integraton test

[xmclark]

Add an integration test for running nginx with wasmer.

This is a brute-force, straight-forward solution. A shell script that starts the nginx server, and then curls it.

[syrusakbary]

I think for the integrations simpler might be easier to do it directly with a shell script that can run in CircleCI.
(rather than a rust test itself, that we need to compile first to execute later).

Thoughts?

[xmclark]

Yes! @lachlansneff and I talked about writing it in rust. I said I would try it out and this is my stab/iteration.

It does seem a little overkill. My first thought was to write a shell script.

A benefit is our testing lives all under-one-roof. Cargo is the sole program we interact with for running tests. We get the benefit of assertions, cargo visualization, control flow, etc.

[xmclark]

I think it could be as simple as a shell script like this. @syrusakbary , if you prefer the simplicity of the shell script, I can drop this PR and make something like this:

# nginx.sh
#! /bin/bash

# Build the release and run nginx
make release
nohup ./target/release/wasmer run examples/nginx/nginx.wasm -- -p examples/nginx/ -c nginx.conf &
sleep 1s

curl localhost:8080 > ./nginx.out


if grep "<title>Nginx running with Wasmer</title>" ./nginx.out
then
    echo "SUCCESS"
    exit 0
else
    echo "FAILURE"
    exit 1
fi

rm ./nginx.out

[xmclark]

I went ahead and switched it to a shell script.

[appcypher]

I think you committed this one by mistake.

[xmclark]

I went ahead and switched it to a shell script. This should be reverted now :)

[syrusakbary]

Looks great!