feat: add open method (#2)

* feat: add open method

* chore: rm yarn.lock

* chore: update deps

package.json

@@ -32,9 +32,9 @@
   },
   "homepage": "https://github.com/ipfs/js-datastore-fs#readme",
   "dependencies": {
-    "datastore-core": "^0.1.0",
+    "datastore-core": "^0.2.0",
     "graceful-fs": "^4.1.11",
-    "interface-datastore": "^0.1.0",
+    "interface-datastore": "^0.1.1",
     "level-js": "^2.2.4",
     "leveldown": "^1.6.0",
     "levelup": "^1.3.5",
@@ -44,15 +44,16 @@
     "write-file-atomic": "^1.3.1"
   },
   "devDependencies": {
-    "aegir": "^10.0.0",
+    "aegir": "^11.0.1",
     "async": "^2.1.5",
     "chai": "^3.5.0",
-    "cids": "^0.4.1",
-    "flow-bin": "^0.41.0",
+    "cids": "^0.4.2",
+    "dirty-chai": "^1.2.2",
+    "flow-bin": "^0.42.0",
     "memdown": "^1.2.4",
     "rimraf": "^2.6.1"
   },
   "contributors": [
     "Friedel Ziegelmayer <dignifiedquire@gmail.com>"
   ]
-}
+}

src/index.js

@@ -55,6 +55,11 @@ class FsDatastore {
     }
   }
 
+  open (callback /* : Callback<void> */) /* : void */ {
+    this._openOrCreate()
+    setImmediate(callback)
+  }
+
   /**
    * Check if the path actually exists.
    * @private

test/index.spec.js

@@ -2,9 +2,11 @@
 /* eslint-env mocha */
 'use strict'
 
+const chai = require('chai')
+chai.use(require('dirty-chai'))
+const expect = chai.expect
 const pull = require('pull-stream')
 const path = require('path')
-const expect = require('chai').expect
 const mkdirp = require('mkdirp')
 const rimraf = require('rimraf')
 const waterfall = require('async/waterfall')
@@ -94,7 +96,7 @@ describe('FsDatastore', () => {
     pull(
       fs.query({}),
       pull.collect((err, res) => {
-        expect(err).to.not.exist
+        expect(err).to.not.exist()
         expect(res).to.have.length(23)
         done()
       })
@@ -116,7 +118,7 @@ describe('FsDatastore', () => {
         ),
         (cb) => flatfs.get(key, cb)
       ], (err, res) => {
-        expect(err).to.not.exist
+        expect(err).to.not.exist()
         expect(res[0]).to.have.length(23)
         expect(res[1]).to.be.eql(expected)