@devtools: Enable file uploads by changing input elements' value

e2e/element.test.js

@@ -105,6 +105,12 @@ describe('elements', () => {
         expect(await browser.getElementProperty(textarea[ELEMENT_KEY], 'value')).toBe('foobar')
     })
 
+    it.only('elementSendKeys for file-type input', async () => {
+        const fileInput = await browser.findElement('css selector', '#upload-test')
+        await browser.elementSendKeys(fileInput[ELEMENT_KEY], 'README.MD')
+        expect(await browser.getElementProperty(fileInput[ELEMENT_KEY], 'value')).toBe('C:\\fakepath\\README.MD')
+    })
+
     it('elementClear', async () => {
         const textarea = await browser.findElement('css selector', 'textarea')
         await browser.elementClear(textarea[ELEMENT_KEY])

packages/devtools/src/commands/elementSendKeys.js

@@ -1,4 +1,5 @@
 import { getStaleElementError } from '../utils'
+import path from 'path'
 
 export default async function elementSendKeys ({ elementId, text }) {
     const elementHandle = this.elementStore.get(elementId)
@@ -9,7 +10,15 @@ export default async function elementSendKeys ({ elementId, text }) {
 
     await elementHandle.focus()
     const page = this.getPageHandle()
-    await page.keyboard.type(text)
+    const tagName = await (await elementHandle.getProperty('tagName')).jsonValue()
+    const type = await (await elementHandle.getProperty('type')).jsonValue()
+
+    if(tagName === 'INPUT' && type === 'file'){
+        const paths = (text || '').split('\n').map(p => path.resolve(p))
+        await elementHandle.uploadFile(...paths)
+    } else {
+        await page.keyboard.type(text)
+    }
 
     return null
 }