Watcher of date type being triggered when dispatch/trigger

Given a following component (Bar.vue):

<template>
  <div>
    <div class="date">{{dateValue2.toISOString()}}</div>
    <div class="int">{{intValue2}}</div>
    <button @click="change">Change</button>
  </div>
</template>

<script>
export default {
  props: ['dateValue', 'intValue'],
  data(){
    return {
      dateValue2: this.dateValue,
      intValue2: this.intValue
    };
  },
  watch: {
    dateValue(newVal, oldVal){
      this.dateValue2 = this.dateValue;
    },
    intValue(newVal, oldVal){
      this.intValue2 = this.intValue;
    }
  },
  methods:{
    change(){
      this.dateValue2 = new Date(
        this.dateValue2.getFullYear(),
        this.dateValue2.getMonth(),
        1
      );
      this.intValue2 += 1;
    }
  }
};
</script>

And this test

import { mount } from 'avoriaz'
import Bar from '../src/components/Bar.vue'
var test = require('tape')

test('set date', (t) => {
  const wrapper = mount(Bar, {
    propsData:{
      dateValue: new Date(2017, 5, 21),
      intValue: 1
    }
  });
  let date = wrapper.find('.date')[0];
  let int = wrapper.find('.int')[0];
  t.is(date.text(), new Date(2017, 5, 21).toISOString(), 'dateValue2 before');
  t.is(int.text(), '1', 'intValue2 before');

  wrapper.find('button')[0].dispatch('click');

  t.is(date.text(), new Date(2017, 5, 1).toISOString(), 'dateValue2 after');
  t.is(int.text(), '2', 'intValue2 after');

  t.end();
});

The test for dateValue2 after would fail. I found that the dispatch('click') has somehow triggered the watcher dateValue thus re-assign the value.

This test would pass for version 1.14.0, but fail at current 2.4.0.

I have created the test here: https://github.com/jackysee/avoriaz-tape-example

[eddyerburgh]

This should be fixed in 2.4.1

Only watchers that match the value changed will run

[eddyerburgh]

Yeah, update runs all the watchers, and trigger runs update. The reason I ran the watchers was to fix with this issue - #64.

Temporary solution is to use 1.14.0 until I come up with a solution