test: add test coverage for multi-root and slot cleanup (testing-library#295)

Author: lyncasterc

Diff for: src/__tests__/auto-cleanup.js

@@ -16,3 +16,33 @@ test('renders the component', () => {
 test('cleans up after each test by default', () => {
   expect(document.body.innerHTML).toMatchInlineSnapshot(``)
 })
+
+test('renders multi-root component', () => {
+  render({
+    template: `
+      <h1>Hello World</h1>
+      <h2>Hello World</h2>
+    `,
+  })
+
+  expect(document.body.innerHTML).toMatchInlineSnapshot(`
+    <div>
+      <h1>Hello World</h1>
+      <h2>Hello World</h2>
+    </div>
+  `)
+})
+
+test('cleans up after rendering multi-root node', () => {
+  expect(document.body.innerHTML).toMatchInlineSnapshot(``)
+})
+
+test('renders single slot component', () => {
+  render({template: `<slot />`})
+
+  expect(document.body.innerHTML).toMatchInlineSnapshot(`<div></div>`)
+})
+
+test('cleans up after rendering slot component', () => {
+  expect(document.body.innerHTML).toMatchInlineSnapshot(``)
+})