Support encoding options on chained batch put() and del()

Ref Level/levelup#633

index.js

@@ -161,14 +161,14 @@ function Batch (db, codec) {
 
 inherits(Batch, AbstractChainedBatch)
 
-Batch.prototype._put = function (key, value) {
-  key = this.codec.encodeKey(key)
-  value = this.codec.encodeValue(value)
+Batch.prototype._put = function (key, value, options) {
+  key = this.codec.encodeKey(key, options)
+  value = this.codec.encodeValue(value, options)
   this.batch.put(key, value)
 }
 
-Batch.prototype._del = function (key) {
-  key = this.codec.encodeKey(key)
+Batch.prototype._del = function (key, options) {
+  key = this.codec.encodeKey(key, options)
   this.batch.del(key)
 }
 

test/index.js

@@ -205,6 +205,28 @@ test('chainedBatch.put() encodes key and value', function (t) {
   encdown(down).batch().put(1, 2)
 })
 
+test('chainedBatch.put() takes custom encoding', function (t) {
+  t.plan(4)
+
+  const expectedKeys = ['"a"', 'a']
+  const expectedValues = ['"b"', 'b']
+
+  const down = {
+    batch: function () {
+      return {
+        put: function (key, value) {
+          t.is(key, expectedKeys.shift())
+          t.is(value, expectedValues.shift())
+        }
+      }
+    }
+  }
+
+  encdown(down).batch()
+    .put('a', 'b', { keyEncoding: 'json', valueEncoding: 'json' })
+    .put('a', 'b')
+})
+
 test('chainedBatch.del() encodes key', function (t) {
   t.plan(1)
 
@@ -221,6 +243,26 @@ test('chainedBatch.del() encodes key', function (t) {
   encdown(down).batch().del(1)
 })
 
+test('chainedBatch.del() takes custom encoding', function (t) {
+  t.plan(2)
+
+  const expectedKeys = ['"a"', 'a']
+
+  const down = {
+    batch: function () {
+      return {
+        del: function (key) {
+          t.is(key, expectedKeys.shift())
+        }
+      }
+    }
+  }
+
+  encdown(down).batch()
+    .del('a', { keyEncoding: 'json' })
+    .del('a')
+})
+
 test('chainedBatch.clear() is forwarded to underlying store', function (t) {
   t.plan(1)