fix(test-runner): support passing slowMo option (#6991)

Fixes #6984
Reverts #6967

src/test/index.ts

@@ -28,9 +28,10 @@ export const test = _baseTest.extend<PlaywrightTestArgs & PlaywrightTestOptions,
   playwright: [ require('../inprocess'), { scope: 'worker' } ],
   headless: [ undefined, { scope: 'worker' } ],
   channel: [ undefined, { scope: 'worker' } ],
+  slowMo: [ undefined, { scope: 'worker' } ],
   launchOptions: [ {}, { scope: 'worker' } ],
 
-  browser: [ async ({ playwright, browserName, headless, channel, launchOptions }, use) => {
+  browser: [ async ({ playwright, browserName, headless, channel, slowMo, launchOptions }, use) => {
     if (!['chromium', 'firefox', 'webkit'].includes(browserName))
       throw new Error(`Unexpected browserName "${browserName}", must be one of "chromium", "firefox" or "webkit"`);
     const options: LaunchOptions = {
@@ -41,6 +42,8 @@ export const test = _baseTest.extend<PlaywrightTestArgs & PlaywrightTestOptions,
       options.headless = headless;
     if (channel !== undefined)
       options.channel = channel;
+    if (slowMo !== undefined)
+      options.slowMo = slowMo;
     const browser = await playwright[browserName].launch(options);
     await use(browser);
     await browser.close();
@@ -52,6 +55,7 @@ export const test = _baseTest.extend<PlaywrightTestArgs & PlaywrightTestOptions,
   acceptDownloads: undefined,
   bypassCSP: undefined,
   colorScheme: undefined,
+  reducedMotion: undefined,
   deviceScaleFactor: undefined,
   extraHTTPHeaders: undefined,
   geolocation: undefined,
@@ -70,7 +74,7 @@ export const test = _baseTest.extend<PlaywrightTestArgs & PlaywrightTestOptions,
   viewport: undefined,
   contextOptions: {},
 
-  context: async ({ browser, screenshot, trace, video, acceptDownloads, bypassCSP, colorScheme, deviceScaleFactor, extraHTTPHeaders, hasTouch, geolocation, httpCredentials, ignoreHTTPSErrors, isMobile, javaScriptEnabled, locale, offline, permissions, proxy, storageState, viewport, timezoneId, userAgent, contextOptions }, use, testInfo) => {
+  context: async ({ browser, screenshot, trace, video, acceptDownloads, bypassCSP, colorScheme, reducedMotion, deviceScaleFactor, extraHTTPHeaders, hasTouch, geolocation, httpCredentials, ignoreHTTPSErrors, isMobile, javaScriptEnabled, locale, offline, permissions, proxy, storageState, viewport, timezoneId, userAgent, contextOptions }, use, testInfo) => {
     testInfo.snapshotSuffix = process.platform;
     if (process.env.PWDEBUG)
       testInfo.setTimeout(0);
@@ -87,6 +91,8 @@ export const test = _baseTest.extend<PlaywrightTestArgs & PlaywrightTestOptions,
       options.bypassCSP = bypassCSP;
     if (colorScheme !== undefined)
       options.colorScheme = colorScheme;
+    if (reducedMotion !== undefined)
+      options.reducedMotion = reducedMotion;
     if (deviceScaleFactor !== undefined)
       options.deviceScaleFactor = deviceScaleFactor;
     if (extraHTTPHeaders !== undefined)

tests/playwright-test/fixtures.spec.ts

@@ -529,7 +529,7 @@ test('should create a new worker for worker fixtures', async ({ runInlineTest })
     'a.test.ts': `
       const { test } = pwt;
       test('base test', async ({}, testInfo) => {
-        expect(testInfo.workerIndex).toBe(0);
+        expect(testInfo.workerIndex).toBe(1);
       });
 
       const test2 = test.extend({
@@ -539,7 +539,7 @@ test('should create a new worker for worker fixtures', async ({ runInlineTest })
         }, { scope: 'worker' }],
       });
       test2('a test', async ({ foo }, testInfo) => {
-        expect(testInfo.workerIndex).toBe(1);
+        expect(testInfo.workerIndex).toBe(0);
       });
     `,
     'b.test.ts': `
@@ -551,7 +551,7 @@ test('should create a new worker for worker fixtures', async ({ runInlineTest })
         },
       });
       test2('b test', async ({ bar }, testInfo) => {
-        expect(testInfo.workerIndex).toBe(0);
+        expect(testInfo.workerIndex).toBe(1);
       });
     `,
   }, { workers: 1 });

types/test.d.ts

@@ -882,6 +882,13 @@ type BrowserChannel = Exclude<LaunchOptions['channel'], undefined>;
  */
 type ColorScheme = Exclude<BrowserContextOptions['colorScheme'], undefined>;
 
+/**
+ * Emulates `'prefers-reduced-motion'` media feature,
+ * supported values are `'reduce'`, `'no-preference'`.
+ * @see BrowserContextOptions
+ */
+ type ReducedMotion = Exclude<BrowserContextOptions['reducedMotion'], undefined>;
+
 /**
  * An object containing additional HTTP headers to be sent with every request. All header values must be strings.
  * @see BrowserContextOptions
@@ -932,6 +939,13 @@ export type PlaywrightWorkerOptions = {
    */
   channel: BrowserChannel | undefined;
 
+  /**
+   * Slows down Playwright operations by the specified amount of milliseconds.
+   * Useful so that you can see what is going on.
+   * @see LaunchOptions
+   */
+   slowMo: number | undefined;
+
   /**
    * Options used to launch the browser. Other options above (e.g. `headless`) take priority.
    * @see LaunchOptions
@@ -997,6 +1011,12 @@ export type PlaywrightTestOptions = {
    */
   colorScheme: ColorScheme | undefined;
 
+  /**
+   * Emulates `'prefers-reduced-motion'` media feature, supported values are `'reduce'`, `'no-preference'`.
+   * @see BrowserContextOptions
+   */
+   reducedMotion: ReducedMotion | undefined;
+
   /**
    * Specify device scale factor (can be thought of as dpr). Defaults to `1`.
    * @see BrowserContextOptions