fix tests on empty json

src/bumpover/index.js

@@ -84,7 +84,7 @@ function bumpRoot (node, options, bumpFn, resolve, reject) {
   }
 
   if (!Array.isArray(node[childKey])) {
-    resolve(node)
+    resolve(serializer(node) || defaultValue)
     return
   }
 

test/json/input.js

@@ -2,7 +2,19 @@ import test from 'ava'
 import { JSONBumpover } from '../../lib'
 
 test('empty data', async t => {
-  const input = JSON.stringify
+  const input = '{}'
+
+  const expected = '{}'
+
+  const rules = []
+
+  const bumper = new JSONBumpover(rules)
+
+  return bumper.bump(input).then(actual => t.deepEqual(actual, expected))
+})
+
+test('throw wrong data', async t => {
+  const input = ''
 
   const rules = []
 
@@ -11,7 +23,19 @@ test('empty data', async t => {
   await t.throws(bumper.bump(input))
 })
 
-test('empty data', async t => {
+test('catch wrong data', async t => {
+  const input = ''
+
+  const noop = () => {}
+
+  const rules = []
+
+  const bumper = new JSONBumpover(rules)
+
+  await t.notThrows(bumper.bump(input).catch(noop))
+})
+
+test('nested data', t => {
   const input = '{"id":1,"children":[{"id":2,"children":[{"id":3,"children":[{"id":4,"children":[]},{"id":5,"children":[]},{"id":6,"children":[]}]}]}]}'
 
   const expected = '{"id":2,"children":[{"id":3,"children":[{"id":4,"children":[{"id":5,"children":[]},{"id":6,"children":[]},{"id":7,"children":[]}]}]}]}'

test/xml/input.js

@@ -6,7 +6,7 @@ const connect = arr => arr.map(line => line.trim()).join('')
 test('empty data', t => {
   const input = ''
 
-  const expected = {}
+  const expected = null
 
   const rules = [
     {