Add --snapshots and basic test

src/cli/index.js

@@ -32,6 +32,11 @@ module.exports = function () {
         alias: 's',
         description: 'Set static files directory'
       },
+      snapshots: {
+        alias: 'S',
+        description: 'Set snapshots directory',
+        default: '.'
+      },
       delay: {
         alias: 'd',
         description: 'Add delay to responses (ms)'

src/cli/run.js

@@ -117,7 +117,8 @@ module.exports = function (argv) {
     process.stdin.setEncoding('utf8')
     process.stdin.on('data', function (chunk) {
       if (chunk.trim().toLowerCase() === 's') {
-        var file = 'db-' + Date.now() + '.json'
+        var filename = 'db-' + Date.now() + '.json'
+        var file = path.join(argv.snapshots, filename)
         app.db.saveSync(file)
         console.log('  Saved snapshot to ' + file + '\n')
       }