Remove legacy range options (Level/community#86)

index.js

@@ -62,11 +62,15 @@ Codec.prototype.encodeBatch = function (ops, opts) {
   })
 }
 
-const ltgtKeys = ['lt', 'gt', 'lte', 'gte', 'start', 'end']
+const ltgtKeys = ['lt', 'gt', 'lte', 'gte']
 
 Codec.prototype.encodeLtgt = function (ltgt) {
   const ret = {}
   Object.keys(ltgt).forEach((key) => {
+    if (key === 'start' || key === 'end') {
+      throw new Error('Legacy range options ("start" and "end") have been removed')
+    }
+
     ret[key] = ltgtKeys.indexOf(key) > -1
       ? this.encodeKey(ltgt[key], ltgt)
       : ltgt[key]

test/ltgt.js

@@ -5,21 +5,35 @@ test('encode ltgt', function (t) {
   const codec = new Codec({ keyEncoding: 'hex' })
 
   let ltgt = {
-    start: '686579',
+    gte: '686579',
     lte: '686579'
   }
   let encoded = codec.encodeLtgt(ltgt)
-  t.equal(encoded.start.toString(), 'hey')
+  t.equal(encoded.gte.toString(), 'hey')
   t.equal(encoded.lte.toString(), 'hey')
 
   ltgt = {
-    start: '686579',
+    gte: '686579',
     lte: '686579',
     keyEncoding: 'json'
   }
   encoded = codec.encodeLtgt(ltgt)
-  t.equal(encoded.start, '"686579"')
+  t.equal(encoded.gte, '"686579"')
   t.equal(encoded.lte, '"686579"')
 
   t.end()
 })
+
+test('rejects legacy range options', function (t) {
+  t.plan(2)
+
+  const codec = new Codec()
+
+  for (const k of ['start', 'end']) {
+    try {
+      codec.encodeLtgt({ [k]: 123 })
+    } catch (err) {
+      t.is(err.message, 'Legacy range options ("start" and "end") have been removed')
+    }
+  }
+})