test: move WebContentsView spec (#19990)

spec-main/api-web-contents-view-spec.ts

@@ -0,0 +1,37 @@
+import { expect } from 'chai'
+import * as ChildProcess from 'child_process'
+import * as path from 'path'
+import { emittedOnce } from './events-helpers'
+import { closeWindow } from './window-helpers'
+
+import { webContents, TopLevelWindow, WebContentsView } from 'electron'
+
+describe('WebContentsView', () => {
+  let w: TopLevelWindow
+  afterEach(() => closeWindow(w as any).then(() => { w = null as unknown as TopLevelWindow }))
+
+  it('can be used as content view', () => {
+    const web = (webContents as any).create({})
+    w = new TopLevelWindow({ show: false })
+    w.setContentView(new WebContentsView(web))
+  })
+
+  it('prevents adding same WebContents', () => {
+    const web = (webContents as any).create({})
+    w = new TopLevelWindow({ show: false })
+    w.setContentView(new WebContentsView(web))
+    expect(() => {
+      w.setContentView(new WebContentsView(web))
+    }).to.throw('The WebContents has already been added to a View')
+  })
+
+  describe('new WebContentsView()', () => {
+    it('does not crash on exit', async () => {
+      const appPath = path.join(__dirname, 'fixtures', 'api', 'leak-exit-webcontentsview.js')
+      const electronPath = process.execPath
+      const appProcess = ChildProcess.spawn(electronPath, [appPath])
+      const [code] = await emittedOnce(appProcess, 'close')
+      expect(code).to.equal(0)
+    })
+  })
+})