fix: add test and fix constructor

License: MIT
Signed-off-by: Jacob Heun <jacobheun@gmail.com>

.gitignore

@@ -37,3 +37,4 @@ node_modules
 lib
 dist
 test/test-repo/datastore
+init-default

package.json

@@ -48,10 +48,10 @@
     "pull-stream": "^3.6.1"
   },
   "devDependencies": {
-    "aegir": "^12.1.3",
-    "async": "^2.5.0",
+    "aegir": "^13.1.0",
+    "async": "^2.6.0",
     "chai": "^4.1.2",
-    "cids": "~0.5.2",
+    "cids": "~0.5.3",
     "dirty-chai": "^2.0.1",
     "flow-bin": "^0.58.0",
     "memdown": "^1.4.1",

src/index.js

@@ -24,18 +24,23 @@ class LevelDatastore {
   /* :: db: levelup */
 
   constructor (path /* : string */, opts /* : ?LevelOptions */) {
-    // Default to leveldown db
-    const database = opts && opts.db ? opts.db : require('leveldown')
-    delete opts.db
+    let database
+
+    if (opts && opts.db) {
+      database = opts.db
+      delete opts.db
+    } else {
+      // Default to leveldown db
+      database = require('leveldown')
+    }
 
     this.db = levelup(
-      database(
-        path,
-        Object.assign({}, opts, {
-          compression: false, // same default as go
-          valueEncoding: 'binary'
-        })
-      ), (err) => {
+      database(path),
+      Object.assign({}, opts, {
+        compression: false, // same default as go
+        valueEncoding: 'binary'
+      }),
+      (err) => {
         // Prevent an uncaught exception error on duplicate locks
         if (err) {
           throw err

test/index.spec.js

@@ -2,11 +2,49 @@
 /* eslint-env mocha */
 'use strict'
 
+const chai = require('chai')
+chai.use(require('dirty-chai'))
+const expect = chai.expect
 const memdown = require('memdown')
+const LevelDown = require('leveldown')
 
 const LevelStore = require('../src')
 
 describe('LevelDatastore', () => {
+  describe('initialization', () => {
+    it('should default to a leveldown database', (done) => {
+      const levelStore = new LevelStore('init-default')
+
+      levelStore.open((err) => {
+        expect(err).to.not.exist()
+        expect(levelStore.db.db instanceof LevelDown).to.equal(true)
+        expect(levelStore.db.options).to.include({
+          createIfMissing: true,
+          errorIfExists: false
+        })
+        done()
+      })
+    })
+
+    it('should be able to override the database', (done) => {
+      const levelStore = new LevelStore('init-default', {
+        db: memdown,
+        createIfMissing: true,
+        errorIfExists: true
+      })
+
+      levelStore.open((err) => {
+        expect(err).to.not.exist()
+        expect(levelStore.db.db instanceof memdown).to.equal(true)
+        expect(levelStore.db.options).to.include({
+          createIfMissing: true,
+          errorIfExists: true
+        })
+        done()
+      })
+    })
+  })
+
   describe('interface-datastore (memdown)', () => {
     require('interface-datastore/src/tests')({
       setup (callback) {