Javascript 按钮单击发射测试失败，错误为Jest/VueJS

我收到jest测试的错误消息，无法在空包装器上调用trigger（），我不确定为什么它找不到我的

deleteEl

 emit onDelete event to the parent

[vue-test-utils]: find did not return [data-test="deleteEl"], cannot call trigger() on empty Wrapper

  47 |     const chipEl = new ComponentWrapper(wrapper.findAllComponents(FilterChip).at(0))
  48 |     const deleteEl = chipEl.findByDataTest('deleteEl')
> 49 |     deleteEl.trigger('click')
     |              ^
  50 |     expect(wrapper.emitted('deleteEl')).toBeTruthy()
  51 | 
  52 |     expect(wrapper.findAllComponents(FilterChip).length).toBe(sampleChips.length)

这是我的父部件代码

<label v-for="chip of chips" :key="chip.label">
    <FilterChip
      :data-test="deleteEl"
      :text="chip"
      :key="chip.label"
      v-bind="$attrs"
      category="secondary"
      @remove-filter-chip="deleteChip(chip)"
    ></FilterChip>
  </label>

这是子组件

<div class="filter-chip" :title="text" :data-test="deleteEl">
<Chip :category="category" :truncated="truncated">
  <span>{{ text }}</span>
  <button type="button" class="btn--close" :data-test="deleteEl" @click="removeFilterChip">
    <i class="material-icons">close</i>
  </button>
</Chip>

{{text}}
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