Add basic http smoke test

- Add mocha dev dependency
- Add test to launch server and GET basic urls
- Add `yarn test` to travis

.travis.yml

@@ -11,3 +11,4 @@ install:
   - yarn
 script:
   - yarn build
+  - yarn test

package.json

@@ -6,7 +6,8 @@
   "private": true,
   "scripts": {
     "dev": "webpack-dev-server --content-base static --mode development",
-    "build": "NODE_ENV=production webpack --mode production"
+    "build": "NODE_ENV=production webpack --mode production",
+    "test": "./node_modules/mocha/bin/mocha"
   },
   "dependencies": {
     "babel-polyfill": "^6.26.0",
@@ -37,6 +38,7 @@
     "file-loader": "^2.0.0",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^0.4.4",
+    "mocha": "^5.2.0",
     "node-sass": "^4.9.4",
     "redux-devtools": "^3.4.0",
     "sass-loader": "^7.1.0",

test/server_process.js

@@ -0,0 +1,73 @@
+var assert = require('assert');
+var child_process = require('child_process')
+var http = require('http');
+
+var SERVER_LAUNCH_WAIT_TIME = 5 * 1000;
+
+describe('server process', function() {
+  var server_proc = null;
+  var server_exited = false;
+
+  before(function() {
+    this.timeout(SERVER_LAUNCH_WAIT_TIME + 1000);
+
+    console.log("launching server...")
+    server_proc = child_process.spawn('yarn', ['dev'], {
+      cwd: '.'
+    });
+
+    server_proc.on('exit', function(code, signal) {
+      server_exited = true;
+    });
+
+    return (new Promise(function(done) {
+      // @TODO Better way to detect server alive-ness than waiting?
+      setTimeout(done, SERVER_LAUNCH_WAIT_TIME)
+    }));
+  });
+
+  after(function() {
+    console.log("killing server...")
+    server_proc.kill();
+  });
+
+  it('should launch', function() {
+    assert.equal(server_exited, false);
+  });
+
+  var urls = [
+    '/',
+    'js/index.bundle.js'
+  ];
+
+  urls.forEach(function(url) {
+
+    it('should respond to request for "' + url + '"', function(done) {
+
+      http.get({
+        hostname: 'localhost',
+        port: 8080,
+        path: '/'
+      }, function(res) {
+        var result_data = '';
+
+        if(res.statusCode != 200) {
+          throw new Error('Server response was not 200.');
+        }
+
+        res.on('data', function(data) { result_data += data });
+
+        res.on('end', function() {
+          if (result_data.length > 0) {
+            done();
+          } else {
+            done(new Error("Server returned no data."));
+          }
+        });
+      })
+
+    });
+
+  });
+
+});