VueJs 如何删除全局错误处理程序以使用 vue-test-utils 进行测试

Question

我是运行 vue 中 canvas 的单元测试（测试通过）。但是我收到错误 console.error node_modules/@vue/test-utils/dist/vue-test-utils.js:1735 [vue-test-utils]: Global error handler detected (Vue.config.errorHandler). Vue Test Utils sets a custom error handler to throw errors thrown by instances. If you want this behavior in your tests, you must remove the global error handler.

我试过停用错误处理程序，但这似乎不受支持？ https://vuejs.org/v2/api/#errorHandler 如何应用错误消息中的建议？

这里有一个类似的问题：How to disable the "Global error handler detected" warning in vue test utils，但没有有用的答案。

我的测试是使用 jest 和 fabric 编写的（针对 canvas）：

import FabricCanvas from './FabricCanvas';
import { fabric } from 'fabric';
import { shallowMount  } from '@vue/test-utils';

import PolygonDrawing from "@/components/labeling/editor/drawing/PolygonDrawing";

function getFabricCanvas(): fabric.Canvas {
  const wrapper = shallowMount (FabricCanvas);
  const canvas = wrapper.get('#main-canvas').html();
  return new fabric.Canvas(canvas, {
      width: 1024,
      height: 1024,
  } as any);
}

let fCanvas: fabric.Canvas | undefined;

beforeAll(() => {
  fCanvas = getFabricCanvas();
})

  test('add a Polygon to the canvas startDrawingPolygon and stopDrawingPolygon', () => {
    const polygonDrawing = new PolygonDrawing();
    if (fCanvas) {
      expect(fCanvas._objects.length).toStrictEqual(0);
    }
    const objectClass = 'Vehicle';
    const shapeType = 'polygon';
    let startMousePoint = {x: 200, y: 200};
    polygonDrawing.startDrawingPolygon(fCanvas, startMousePoint, objectClass, shapeType);
    startMousePoint = {x: 300, y: 300};
    polygonDrawing.startDrawingPolygon(fCanvas, startMousePoint, objectClass, shapeType);
    startMousePoint = {x: 200, y: 300};
    polygonDrawing.startDrawingPolygon(fCanvas, startMousePoint, objectClass, shapeType);
    
    if (fCanvas) {
      polygonDrawing.stopDrawingPolygon(fCanvas, shapeType, objectClass);
      expect(fCanvas._objects.length).toStrictEqual(1);
    }
  })
});

canvas 是使用文件 FabricCanvas.vue 模拟的：

<template>
    <div id="canvas-container">
        <canvas width="1024" height="1024" id="main-canvas"></canvas>
    </div>
</template>

<script lang="ts">
    import {Component, Vue} from 'vue-property-decorator';

    @Component
    export default class FabricCanvas extends Vue {
    }
</script>

<style scoped> </style>

Answer 1

感谢 @tony19 的提示，我找到了解决方案：在我的 router/index.js 中有一个来自 Elastic 的名为 APM（应用程序性能监控）的插件：import { ApmVuePlugin } from '@elastic/apm-rum-vue';

这对重复的全局错误处理程序负责，在测试期间停用它解决了错误消息。

VueJs 如何删除全局错误处理程序以使用 vue-test-utils 进行测试

VueJs how to remove global error handler for testing with vue-test-utils

html5-canvas

fabricjs

vue.js

jestjs

vue-test-utils