test: improve coverage

packages/runtime-core/__tests__/rendererChildren.spec.ts

@@ -40,7 +40,7 @@ function shuffle(array: Array<any>) {
   return array
 }
 
-it('should patch previously empty children', () => {
+test('should patch previously empty children', () => {
   const root = nodeOps.createElement('div')
 
   render(h('div', []), root)
@@ -50,7 +50,7 @@ it('should patch previously empty children', () => {
   expect(inner(root)).toBe('<div>hello</div>')
 })
 
-it('should patch previously null children', () => {
+test('should patch previously null children', () => {
   const root = nodeOps.createElement('div')
 
   render(h('div'), root)
@@ -60,6 +60,15 @@ it('should patch previously null children', () => {
   expect(inner(root)).toBe('<div>hello</div>')
 })
 
+test('array children -> text children', () => {
+  const root = nodeOps.createElement('div')
+  render(h('div', [h('div')]), root)
+  expect(inner(root)).toBe('<div><div></div></div>')
+
+  render(h('div', 'hello'), root)
+  expect(inner(root)).toBe('<div>hello</div>')
+})
+
 describe('renderer: keyed children', () => {
   let root: TestElement
   let elm: TestElement

packages/runtime-core/__tests__/rendererFragment.spec.ts

@@ -129,6 +129,20 @@ describe('renderer: fragment', () => {
       root
     )
     expect(serializeInner(root)).toBe(`<div>foo</div>barbaz`)
+
+    render(
+      createVNode(
+        Fragment,
+        null,
+        [
+          createTextVNode('baz'),
+          createVNode('div', null, 'foo', PatchFlags.TEXT)
+        ],
+        PatchFlags.UNKEYED_FRAGMENT
+      ),
+      root
+    )
+    expect(serializeInner(root)).toBe(`baz<div>foo</div>`)
   })
 
   it('patch fragment children (compiler generated, keyed)', () => {