fix: wrapper.text method

This change fixes wrapper.text to handle suspense components with comments in a slot.
When suspense component had comments in a slot, wrapper.text returned empty.

src/baseWrapper.ts

@@ -261,7 +261,7 @@ export default abstract class BaseWrapper<ElementType extends Node>
   }
 
   text() {
-    return textContent(this.element)
+    return this.getRootNodes().map(textContent).join('')
   }
 
   exists() {

tests/text.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { defineComponent, h } from 'vue'
+import { defineComponent, h, Suspense } from 'vue'
 
 import { mount } from '../src'
 
@@ -93,4 +93,16 @@ describe('text', () => {
     const wrapper = mount(() => h(ReturnSlot, {}, () => h(MultiRootText)))
     expect(wrapper.text()).toBe('foobarbaz')
   })
+
+  it('returns correct text for suspense component with comments in a slot', () => {
+    const wrapper = mount({
+      render: () => h(Suspense, {}, {
+        default: () => h(defineComponent({
+          template: `<!-- some comments --><div>Text content</div>`
+        }))
+      })
+    })
+
+    expect(wrapper.text()).toBe('Text content')
+  })
 })