fix unit test

Author: kevinongko

src/vue-numeric.vue

@@ -274,7 +274,7 @@ export default {
   },
 
   mounted () {
-    // Set default value props when valueNumber has some value 
+    // Set default value props when valueNumber has some value
     if (this.valueNumber) {
       this.process(this.valueNumber)
       this.amount = this.format(this.valueNumber)

test/specs/vue-numeric.spec.js

@@ -241,14 +241,14 @@ describe('vue-numeric.vue', () => {
     expect(process.called).to.equal(true)
   })
 
-  it('does not show default value when placeholder if defined', () => {
+  it('does not show placeholder when value defined', () => {
     const wrapper = mount(VueNumeric, { propsData: { value: 2000, placeholder: 'number here' }})
-    expect(wrapper.data().amount).to.equal('')
+    expect(wrapper.data().amount).to.equal('2,000')
   })
 
-  it('sets the value to 0 when no empty value is provided and input is empty', () => {
+  it('does not sets the value to 0 when no empty value is provided and input is empty', () => {
     const wrapper = mount(VueNumeric, { propsData: { value: '' }})
-    expect(wrapper.data().amount).to.equal('0')
+    expect(wrapper.data().amount).to.equal('')
   })
 
   it('uses the provided empty value when input is empty', () => {