fix(keyboard): correctly press enter on firefox (#1023)

Author: JoelEinbinder

src/firefox/ffInput.ts

@@ -64,6 +64,9 @@ export class RawKeyboardImpl implements input.RawKeyboard {
       code = 'OSLeft';
     if (code === 'MetaRight')
       code = 'OSRight';
+    // Firefox will figure out Enter by itself
+    if (text === '\r')
+      text = '';
     await this._client.send('Page.dispatchKeyEvent', {
       type: 'keydown',
       keyCode: keyCodeWithoutLocation,

test/keyboard.spec.js

@@ -207,15 +207,23 @@ module.exports.describe = function({testRunner, expect, FFOX, CHROMIUM, WEBKIT,
       await textarea.press('NumpadSubtract');
       expect(await page.evaluate('keyLocation')).toBe(3);
     });
-    it.skip(FFOX)('should press Enter', async({page, server}) => {
-      await page.setContent('<input></input>');
-      await page.$eval('input', body => body.addEventListener('keydown', event => {
-        if (event.key === 'Enter')
-          window.ENTER_DOWN = true;
-      }, false));
-      await page.focus('input');
-      await page.keyboard.press('Enter');
-      expect(await page.evaluate(() => window.ENTER_DOWN)).toBe(true);
+    it('should press Enter', async({page, server}) => {
+      await page.setContent('<textarea></textarea>');
+      await page.focus('textarea');
+      await page.evaluate(() => window.addEventListener('keydown', e => window.lastEvent = {key: e.key, code:e.code}));
+      await testEnterKey('Enter', 'Enter', 'Enter');
+      await testEnterKey('NumpadEnter', 'Enter', 'NumpadEnter');
+      await testEnterKey('\n', 'Enter', 'Enter');
+      await testEnterKey('\r', 'Enter', 'Enter');
+
+      async function testEnterKey(key, expectedKey, expectedCode) {
+        await page.keyboard.press(key);
+        const lastEvent = await page.evaluate('lastEvent');
+        expect(lastEvent.key).toBe(expectedKey, `${JSON.stringify(key)} had the wrong key: ${lastEvent.key}`);
+        expect(lastEvent.code).toBe(expectedCode, `${JSON.stringify(key)} had the wrong code: ${lastEvent.code}`);
+        expect(await page.$eval('textarea', t => t.value)).toBe('\n', `${JSON.stringify(key)} failed to create a newline`);
+        await page.$eval('textarea', t => t.value = '');
+      }
     });
     it('should throw on unknown keys', async({page, server}) => {
       let error = await page.keyboard.press('NotARealKey').catch(e => e);