Clone options in Pool constructor (fixes #4) (#5)

index.js

@@ -2,10 +2,11 @@ var genericPool = require('generic-pool')
 var util = require('util')
 var EventEmitter = require('events').EventEmitter
 var debug = require('debug')
+var objectAssign = require('object-assign')
 
 var Pool = module.exports = function (options, Client) {
   EventEmitter.call(this)
-  this.options = options || {}
+  this.options = objectAssign({}, options)
   this.log = this.options.log || debug('pg:pool')
   this.Client = this.options.Client || Client || require('pg').Client
   this.Promise = this.options.Promise || Promise

package.json

@@ -37,6 +37,7 @@
   },
   "dependencies": {
     "debug": "^2.2.0",
-    "generic-pool": "2.4.2"
+    "generic-pool": "2.4.2",
+    "object-assign": "4.1.0"
   }
 }

test/index.js

@@ -51,6 +51,17 @@ describe('pool', function () {
         })
       })
     })
+
+    it('should not change given options', function (done) {
+      var options = { max: 10 }
+      var pool = new Pool(options)
+      pool.connect(function (err, client, release) {
+        release()
+        if (err) return done(err)
+        expect(options).to.eql({ max: 10 })
+        pool.end(done)
+      })
+    })
   })
 
   describe('with promises', function () {