add promise tests

Author: juliangruber

test/batch-test.js

@@ -34,6 +34,26 @@ buster.testCase('batch()', {
     })
   },
 
+  'batch() with promise interface': function (done) {
+    this.openTestDatabase(function (db) {
+      db.batch([
+        { type: 'put', key: 'foo', value: 'afoovalue' },
+        { type: 'put', key: 'bar', value: 'abarvalue' },
+        { type: 'put', key: 'baz', value: 'abazvalue' }
+      ])
+        .then(function () {
+          async.forEach(['foo', 'bar', 'baz'], function (key, callback) {
+            db.get(key, function (err, value) {
+              refute(err)
+              assert.equals(value, 'a' + key + 'value')
+              callback()
+            })
+          }, done)
+        })
+        .catch(done)
+    })
+  },
+
   'batch() no type set defaults to put': function (done) {
     this.openTestDatabase(function (db) {
       db.batch([
@@ -125,6 +145,34 @@ buster.testCase('batch()', {
     })
   },
 
+  'batch() with chained promise interface': function (done) {
+    this.openTestDatabase(function (db) {
+      db.put('1', 'one', function (err) {
+        refute(err)
+
+        db.batch()
+          .put('one', '1')
+          .del('two')
+          .put('three', '3')
+          .clear()
+          .del('1')
+          .put('2', 'two')
+          .put('3', 'three')
+          .del('3')
+          .write()
+          .then(function () {
+            async.forEach([ 'one', 'three', '1', '2', '3' ], function (key, callback) {
+              db.get(key, function (err) {
+                if ([ 'one', 'three', '1', '3' ].indexOf(key) > -1) { assert(err) } else { refute(err) }
+                callback()
+              })
+            }, done)
+          })
+          .catch(done)
+      })
+    })
+  },
+
   'batch() exposes ops queue length': function (done) {
     this.openTestDatabase(function (db) {
       var batch = db.batch()

test/get-put-del-test.js

@@ -44,6 +44,20 @@ buster.testCase('get() / put() / del()', {
       })
     },
 
+    'put() and get() promise interface': function (done) {
+      this.openTestDatabase(function (db) {
+        db.put('some key', 'some value stored in the database')
+          .then(function () {
+            return db.get('some key')
+          })
+          .then(function (value) {
+            assert.equals(value, 'some value stored in the database')
+            done()
+          })
+          .catch(done)
+      })
+    },
+
     'del() on empty database doesn\'t cause error': function (done) {
       this.openTestDatabase(function (db) {
         db.del('undefkey', function (err) {
@@ -53,6 +67,14 @@ buster.testCase('get() / put() / del()', {
       })
     },
 
+    'del() promise interface': function (done) {
+      this.openTestDatabase(function (db) {
+        db.del('undefkey')
+          .then(done)
+          .catch(done)
+      })
+    },
+
     'del() works on real entries': function (done) {
       this.openTestDatabase(function (db) {
         async.series([