feat(expect): add more matchers (#7891)

src/test/expect.ts

@@ -15,9 +15,29 @@
  */
 
 import expectLibrary from 'expect';
-import { toBeChecked, toBeDisabled, toBeEditable, toBeEmpty, toBeEnabled, toBeFocused, toBeHidden, toBeVisible } from './matchers/toBeTruthy';
+import {
+  toBeChecked,
+  toBeDisabled,
+  toBeEditable,
+  toBeEmpty,
+  toBeEnabled,
+  toBeFocused,
+  toBeHidden,
+  toBeSelected,
+  toBeVisible
+} from './matchers/toBeTruthy';
+import { toHaveLength, toHaveProp } from './matchers/toEqual';
 import { toMatchSnapshot } from './matchers/toMatchSnapshot';
-import { toContainText, toHaveAttr, toHaveCSS, toHaveData, toHaveId, toHaveText, toHaveValue } from './matchers/toMatchText';
+import {
+  toContainText,
+  toHaveAttr,
+  toHaveCSS,
+  toHaveClass,
+  toHaveData,
+  toHaveId,
+  toHaveText,
+  toHaveValue
+} from './matchers/toMatchText';
 import type { Expect } from './types';
 
 export const expect: Expect = expectLibrary as any;
@@ -30,12 +50,16 @@ expectLibrary.extend({
   toBeEnabled,
   toBeFocused,
   toBeHidden,
+  toBeSelected,
   toBeVisible,
   toContainText,
   toHaveAttr,
   toHaveCSS,
+  toHaveClass,
   toHaveData,
   toHaveId,
+  toHaveLength,
+  toHaveProp,
   toHaveText,
   toHaveValue,
   toMatchSnapshot,

src/test/matchers/toBeTruthy.ts

@@ -16,50 +16,46 @@
 
 import {
   matcherHint,
-  MatcherHintOptions,
-  printReceived
+  MatcherHintOptions
 } from 'jest-matcher-utils';
 import { Locator } from '../../..';
 import { currentTestInfo } from '../globals';
 import type { Expect } from '../types';
-import { monotonicTime, pollUntilDeadline } from '../util';
+import { expectLocator, monotonicTime, pollUntilDeadline } from '../util';
 
-
-async function toBeTruthyImpl(
+async function toBeTruthyImpl<T>(
   this: ReturnType<Expect['getState']>,
   matcherName: string,
-  query: (timeout: number) => Promise<boolean>,
+  locator: Locator,
+  query: (timeout: number) => Promise<T>,
   options: { timeout?: number } = {},
 ) {
   const testInfo = currentTestInfo();
   if (!testInfo)
-    throw new Error(`toMatchSnapshot() must be called during the test`);
+    throw new Error(`${matcherName} must be called during the test`);
+  expectLocator(locator, matcherName);
 
   const matcherOptions: MatcherHintOptions = {
     isNot: this.isNot,
     promise: this.promise,
   };
 
-  let received: boolean;
+  let received: T;
   let pass = false;
   const timeout = options.timeout === 0 ? 0 : options.timeout || testInfo.timeout;
   const deadline = timeout ? monotonicTime() + timeout : 0;
 
-  try {
-    await pollUntilDeadline(async () => {
-      const remainingTime = deadline ? deadline - monotonicTime() : 0;
-      received = await query(remainingTime);
-      pass = !!received;
-      return pass === !matcherOptions.isNot;
-    }, deadline, 100);
-  } catch (e) {
-    pass = false;
-  }
+  // TODO: interrupt on timeout for nice message.
+  await pollUntilDeadline(async () => {
+    const remainingTime = deadline ? deadline - monotonicTime() : 0;
+    received = await query(remainingTime);
+    pass = !!received;
+    return pass === !matcherOptions.isNot;
+  }, deadline, 100);
 
-  const message = () =>
-    matcherHint(matcherName, undefined, '', matcherOptions) +
-      '\n\n' +
-      `Received: ${printReceived(received)}`;
+  const message = () => {
+    return matcherHint(matcherName, undefined, '', matcherOptions);
+  };
 
   return { message, pass };
 }
@@ -69,7 +65,7 @@ export async function toBeChecked(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeChecked', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeChecked', locator, async timeout => {
     return await locator.isChecked({ timeout });
   }, options);
 }
@@ -79,7 +75,7 @@ export async function toBeEditable(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeEditable', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeEditable', locator, async timeout => {
     return await locator.isEditable({ timeout });
   }, options);
 }
@@ -89,7 +85,7 @@ export async function toBeEnabled(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeEnabled', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeEnabled', locator, async timeout => {
     return await locator.isEnabled({ timeout });
   }, options);
 }
@@ -99,7 +95,7 @@ export async function toBeDisabled(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeDisabled', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeDisabled', locator, async timeout => {
     return await locator.isDisabled({ timeout });
   }, options);
 }
@@ -109,7 +105,7 @@ export async function toBeEmpty(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeEmpty', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeEmpty', locator, async timeout => {
     return await locator.evaluate(element => {
       if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA')
         return !(element as HTMLInputElement).value;
@@ -123,7 +119,7 @@ export async function toBeHidden(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeHidden', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeHidden', locator, async timeout => {
     return await locator.isHidden({ timeout });
   }, options);
 }
@@ -133,7 +129,7 @@ export async function toBeVisible(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeVisible', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeVisible', locator, async timeout => {
     return await locator.isVisible({ timeout });
   }, options);
 }
@@ -143,9 +139,21 @@ export async function toBeFocused(
   locator: Locator,
   options?: { timeout?: number },
 ) {
-  return toBeTruthyImpl.call(this, 'toBeFocused', async timeout => {
+  return toBeTruthyImpl.call(this, 'toBeFocused', locator, async timeout => {
     return await locator.evaluate(element => {
       return document.activeElement === element;
     }, { timeout });
   }, options);
 }
+
+export async function toBeSelected(
+  this: ReturnType<Expect['getState']>,
+  locator: Locator,
+  options?: { timeout?: number },
+) {
+  return toBeTruthyImpl.call(this, 'toBeSelected', locator, async timeout => {
+    return await locator.evaluate(element => {
+      return (element as HTMLOptionElement).selected;
+    }, { timeout });
+  }, options);
+}

src/test/matchers/toEqual.ts

@@ -0,0 +1,121 @@
+/**
+ * Copyright Microsoft Corporation. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { equals } from 'expect/build/jasmineUtils';
+import matchers from 'expect/build/matchers';
+import {
+  iterableEquality
+} from 'expect/build/utils';
+import {
+  matcherHint, MatcherHintOptions,
+  printDiffOrStringify,
+  printExpected,
+  printReceived,
+  stringify
+} from 'jest-matcher-utils';
+import { Locator } from '../../..';
+import { currentTestInfo } from '../globals';
+import type { Expect } from '../types';
+import { expectLocator, monotonicTime, pollUntilDeadline } from '../util';
+
+// Omit colon and one or more spaces, so can call getLabelPrinter.
+const EXPECTED_LABEL = 'Expected';
+const RECEIVED_LABEL = 'Received';
+
+// The optional property of matcher context is true if undefined.
+const isExpand = (expand?: boolean): boolean => expand !== false;
+
+async function toEqualImpl<T>(
+  this: ReturnType<Expect['getState']>,
+  matcherName: string,
+  locator: Locator,
+  query: (timeout: number) => Promise<T>,
+  expected: T,
+  options: { timeout?: number } = {},
+) {
+  const testInfo = currentTestInfo();
+  if (!testInfo)
+    throw new Error(`${matcherName} must be called during the test`);
+  expectLocator(locator, matcherName);
+
+  const matcherOptions: MatcherHintOptions = {
+    comment: 'deep equality',
+    isNot: this.isNot,
+    promise: this.promise,
+  };
+
+  let received: T | undefined = undefined;
+  let pass = false;
+  const timeout = options.timeout === 0 ? 0 : options.timeout || testInfo.timeout;
+  const deadline = timeout ? monotonicTime() + timeout : 0;
+
+  // TODO: interrupt on timeout for nice message.
+  await pollUntilDeadline(async () => {
+    const remainingTime = deadline ? deadline - monotonicTime() : 0;
+    received = await query(remainingTime);
+    pass = equals(received, expected, [iterableEquality]);
+    return pass === !matcherOptions.isNot;
+  }, deadline, 100);
+
+  const message = pass
+    ? () =>
+      matcherHint(matcherName, undefined, undefined, matcherOptions) +
+      '\n\n' +
+      `Expected: not ${printExpected(expected)}\n` +
+      (stringify(expected) !== stringify(received)
+        ? `Received:     ${printReceived(received)}`
+        : '')
+    : () =>
+      matcherHint(matcherName, undefined, undefined, matcherOptions) +
+      '\n\n' +
+      printDiffOrStringify(
+          expected,
+          received,
+          EXPECTED_LABEL,
+          RECEIVED_LABEL,
+          isExpand(this.expand),
+      );
+
+  // Passing the actual and expected objects so that a custom reporter
+  // could access them, for example in order to display a custom visual diff,
+  // or create a different error message
+  return { actual: received, expected, message, name: matcherName, pass };
+}
+
+export async function toHaveLength(
+  this: ReturnType<Expect['getState']>,
+  locator: Locator,
+  expected: number,
+  options?: { timeout?: number },
+) {
+  if (typeof locator !== 'object' || locator.constructor.name !== 'Locator')
+    return matchers.toHaveLength.call(this, locator, expected);
+  return toEqualImpl.call(this, 'toHaveLength', locator, async timeout => {
+    return await locator.count();
+  }, expected, { expectedType: 'number', ...options });
+}
+
+export async function toHaveProp(
+  this: ReturnType<Expect['getState']>,
+  locator: Locator,
+  name: string,
+  expected: number,
+  options?: { timeout?: number },
+) {
+  return toEqualImpl.call(this, 'toHaveProp', locator, async timeout => {
+    return await locator.evaluate((element, name) => (element as any)[name], name, { timeout });
+  }, expected, { expectedType: 'number', ...options });
+}

src/test/matchers/toMatchText.ts

@@ -31,18 +31,20 @@ import {
 import { Locator } from '../../..';
 import { currentTestInfo } from '../globals';
 import type { Expect } from '../types';
-import { monotonicTime, pollUntilDeadline } from '../util';
+import { expectLocator, monotonicTime, pollUntilDeadline } from '../util';
 
 async function toMatchTextImpl(
   this: ReturnType<Expect['getState']>,
   matcherName: string,
+  locator: Locator,
   query: (timeout: number) => Promise<string>,
   expected: string | RegExp,
   options: { timeout?: number, matchSubstring?: boolean } = {},
 ) {
   const testInfo = currentTestInfo();
   if (!testInfo)
-    throw new Error(`toMatchSnapshot() must be called during the test`);
+    throw new Error(`${matcherName} must be called during the test`);
+  expectLocator(locator, matcherName);
 
   const matcherOptions: MatcherHintOptions = {
     isNot: this.isNot,
@@ -69,22 +71,19 @@ async function toMatchTextImpl(
   const timeout = options.timeout === 0 ? 0 : options.timeout || testInfo.timeout;
   const deadline = timeout ? monotonicTime() + timeout : 0;
 
-  try {
-    await pollUntilDeadline(async () => {
-      const remainingTime = deadline ? deadline - monotonicTime() : 0;
-      received = await query(remainingTime);
-      if (options.matchSubstring)
-        pass = received.includes(expected as string);
-      else if (typeof expected === 'string')
-        pass = received === expected;
-      else
-        pass = expected.test(received);
+  // TODO: interrupt on timeout for nice message.
+  await pollUntilDeadline(async () => {
+    const remainingTime = deadline ? deadline - monotonicTime() : 0;
+    received = await query(remainingTime);
+    if (options.matchSubstring)
+      pass = received.includes(expected as string);
+    else if (typeof expected === 'string')
+      pass = received === expected;
+    else
+      pass = expected.test(received);
 
-      return pass === !matcherOptions.isNot;
-    }, deadline, 100);
-  } catch (e) {
-    pass = false;
-  }
+    return pass === !matcherOptions.isNot;
+  }, deadline, 100);
 
   const stringSubstring = options.matchSubstring ? 'substring' : 'string';
   const message = pass
@@ -130,7 +129,7 @@ export async function toHaveText(
   expected: string | RegExp,
   options?: { timeout?: number, useInnerText?: boolean },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveText', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveText', locator, async timeout => {
     if (options?.useInnerText)
       return await locator.innerText({ timeout });
     return await locator.textContent() || '';
@@ -143,7 +142,7 @@ export async function toContainText(
   expected: string,
   options?: { timeout?: number, useInnerText?: boolean },
 ) {
-  return toMatchTextImpl.call(this, 'toContainText', async timeout => {
+  return toMatchTextImpl.call(this, 'toContainText', locator, async timeout => {
     if (options?.useInnerText)
       return await locator.innerText({ timeout });
     return await locator.textContent() || '';
@@ -157,7 +156,7 @@ export async function toHaveAttr(
   expected: string | RegExp,
   options?: { timeout?: number },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveAttr', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveAttr', locator, async timeout => {
     return await locator.getAttribute(name, { timeout }) || '';
   }, expected, options);
 }
@@ -169,7 +168,7 @@ export async function toHaveData(
   expected: string | RegExp,
   options?: { timeout?: number },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveData', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveData', locator, async timeout => {
     return await locator.getAttribute('data-' + name, { timeout }) || '';
   }, expected, options);
 }
@@ -181,7 +180,7 @@ export async function toHaveCSS(
   expected: string | RegExp,
   options?: { timeout?: number },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveCSS', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveCSS', locator, async timeout => {
     return await locator.evaluate(async (element, name) => {
       return (window.getComputedStyle(element) as any)[name];
     }, name, { timeout });
@@ -194,7 +193,7 @@ export async function toHaveId(
   expected: string | RegExp,
   options?: { timeout?: number },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveId', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveId', locator, async timeout => {
     return await locator.getAttribute('id', { timeout }) || '';
   }, expected, options);
 }
@@ -205,7 +204,17 @@ export async function toHaveValue(
   expected: string | RegExp,
   options?: { timeout?: number },
 ) {
-  return toMatchTextImpl.call(this, 'toHaveValue', async timeout => {
+  return toMatchTextImpl.call(this, 'toHaveValue', locator, async timeout => {
     return await locator.inputValue({ timeout });
   }, expected, options);
-}
+}
+export async function toHaveClass(
+  this: ReturnType<Expect['getState']>,
+  locator: Locator,
+  expected: string,
+  options?: { timeout?: number },
+) {
+  return toMatchTextImpl.call(this, 'toHaveClass', locator, async timeout => {
+    return await locator.evaluate(element => element.className, { timeout });
+  }, expected, { ...options, matchSubstring: true });
+}

src/test/util.ts

@@ -18,7 +18,7 @@ import util from 'util';
 import path from 'path';
 import type { TestError, Location } from './types';
 import { default as minimatch } from 'minimatch';
-import { TimeoutError } from '../utils/errors';
+import { errors } from '../..';
 
 export class DeadlineRunner<T> {
   private _timer: NodeJS.Timer | undefined;
@@ -72,14 +72,19 @@ export async function raceAgainstDeadline<T>(promise: Promise<T>, deadline: numb
 
 export async function pollUntilDeadline(func: () => Promise<boolean>, deadline: number, delay: number): Promise<void> {
   while (true) {
-    if (await func())
-      return;
-
     const timeUntilDeadline = deadline ? deadline - monotonicTime() : Number.MAX_VALUE;
-    if (timeUntilDeadline > 0)
-      await new Promise(f => setTimeout(f, Math.min(timeUntilDeadline, delay)));
-    else
-      throw new TimeoutError('Timed out while waiting for condition to be met');
+    if (timeUntilDeadline <= 0)
+      break;
+
+    try {
+      if (await func())
+        return;
+    } catch (e) {
+      if (e instanceof errors.TimeoutError)
+        return;
+      throw e;
+    }
+    await new Promise(f => setTimeout(f, delay));
   }
 }
 
@@ -181,3 +186,8 @@ export function errorWithFile(file: string, message: string) {
 export function errorWithLocation(location: Location, message: string) {
   return new Error(`${formatLocation(location)}: ${message}`);
 }
+
+export function expectLocator(receiver: any, matcherName: string) {
+  if (typeof receiver !== 'object' || receiver.constructor.name !== 'Locator')
+    throw new Error(`${matcherName} can be only used with Locator object`);
+}

tests/page/locator-query.spec.ts

@@ -47,3 +47,15 @@ it('should throw on capture w/ nth()', async ({page}) => {
   const e = await page.locator('*css=div >> p').nth(0).click().catch(e => e);
   expect(e.message).toContain(`Can't query n-th element`);
 });
+
+it('should throw on due to strictness', async ({page}) => {
+  await page.setContent(`<div>A</div><div>B</div>`);
+  const e = await page.locator('div').isVisible().catch(e => e);
+  expect(e.message).toContain(`strict mode violation`);
+});
+
+it('should throw on due to strictness 2', async ({page}) => {
+  await page.setContent(`<select><option>One</option><option>Two</option></select>`);
+  const e = await page.locator('option').evaluate(e => {}).catch(e => e);
+  expect(e.message).toContain(`strict mode violation`);
+});

tests/playwright-test/playwright.expect.misc.spec.ts

@@ -0,0 +1,87 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { test, expect, stripAscii } from './playwright-test-fixtures';
+
+test('should support toHaveLength', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'a.test.ts': `
+      const { test } = pwt;
+
+      test('pass', async ({ page }) => {
+        await page.setContent('<select><option>One</option><option>Two</option></select>');
+        const locator = page.locator('option');
+        await expect(locator).toHaveLength(2);
+        await expect([1, 2]).toHaveLength(2);
+      });
+      `,
+  }, { workers: 1 });
+  expect(result.passed).toBe(1);
+  expect(result.exitCode).toBe(0);
+});
+
+test('should support toHaveProp', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'a.test.ts': `
+      const { test } = pwt;
+
+      test('pass', async ({ page }) => {
+        await page.setContent('<div></div>');
+        await page.$eval('div', e => e.foo = { a: 1, b: 'string', c: new Date(1627503992000) });
+        const locator = page.locator('div');
+        await expect(locator).toHaveProp('foo', { a: 1, b: 'string', c: new Date(1627503992000) });
+      });
+
+      test('fail', async ({ page }) => {
+        await page.setContent('<div></div>');
+        await page.$eval('div', e => e.foo = { a: 1, b: 'string', c: new Date(1627503992000) });
+        const locator = page.locator('div');
+        await expect(locator).toHaveProp('foo', { a: 1, b: 'string', c: new Date(1627503992001) }, { timeout: 1000 });
+      });
+      `,
+  }, { workers: 1 });
+  const output = stripAscii(result.output);
+  expect(output).toContain('-   "c"');
+  expect(result.passed).toBe(1);
+  expect(result.failed).toBe(1);
+  expect(result.exitCode).toBe(1);
+});
+
+test('should support toHaveClass', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'a.test.ts': `
+      const { test } = pwt;
+
+      test('pass', async ({ page }) => {
+        await page.setContent('<div class="foo bar baz"></div>');
+        const locator = page.locator('div');
+        await expect(locator).toHaveClass('foo');
+      });
+
+      test('fail', async ({ page }) => {
+        await page.setContent('<div class="bar baz"></div>');
+        const locator = page.locator('div');
+        await expect(locator).toHaveClass('foo', { timeout: 1000 });
+      });
+      `,
+  }, { workers: 1 });
+  const output = stripAscii(result.output);
+  expect(output).toContain('expect(locator).toHaveClass');
+  expect(output).toContain('Expected substring: \"foo\"');
+  expect(result.passed).toBe(1);
+  expect(result.failed).toBe(1);
+  expect(result.exitCode).toBe(1);
+});

tests/playwright-test/playwright.expect.true.spec.ts

@@ -36,7 +36,7 @@ test('should support toBeChecked', async ({ runInlineTest }) => {
       test('fail', async ({ page }) => {
         await page.setContent('<input type=checkbox></input>');
         const locator = page.locator('input');
-        await expect(locator).toBeChecked({ timeout: 100 });
+        await expect(locator).toBeChecked({ timeout: 1000 });
       });
       `,
   }, { workers: 1 });
@@ -72,7 +72,7 @@ test('should support toBeEditable, toBeEnabled, toBeDisabled, toBeEmpty', async
       });
 
       test('empty input', async ({ page }) => {
-        await page.setContent('<input></inpput>');
+        await page.setContent('<input></input>');
         const locator = page.locator('input');
         await expect(locator).toBeEmpty();
       });
@@ -128,7 +128,7 @@ test('should support toBeVisible, toBeHidden', async ({ runInlineTest }) => {
   expect(result.exitCode).toBe(0);
 });
 
-test('should support toBeFocused', async ({ runInlineTest }) => {
+test('should support toBeFocused, toBeSelected', async ({ runInlineTest }) => {
   const result = await runInlineTest({
     'a.test.ts': `
       const { test } = pwt;
@@ -139,8 +139,23 @@ test('should support toBeFocused', async ({ runInlineTest }) => {
         await locator.focus();
         await expect(locator).toBeFocused({ timeout: 1000 });
       });
+
+      test('selected', async ({ page }) => {
+        await page.setContent('<select><option>One</option></select>');
+        const locator = page.locator('option');
+        await expect(locator).toBeSelected();
+      });
+
+      test('fail on strict option', async ({ page }) => {
+        await page.setContent('<select><option>One</option><option>Two</option></select>');
+        const locator = page.locator('option');
+        await expect(locator).toBeSelected();
+      });
       `,
   }, { workers: 1 });
-  expect(result.passed).toBe(1);
-  expect(result.exitCode).toBe(0);
+  const output = stripAscii(result.output);
+  expect(output).toContain('strict mode violation');
+  expect(result.passed).toBe(2);
+  expect(result.failed).toBe(1);
+  expect(result.exitCode).toBe(1);
 });

types/testExpect.d.ts

@@ -143,7 +143,22 @@ declare global {
        * Asserts given DOM is a focused (active) in document.
        */
       toBeFocused(options?: { timeout?: number }): Promise<R>;
-      }
+
+      /**
+       * Asserts given select option is selected
+       */
+      toBeSelected(options?: { timeout?: number }): Promise<R>;
+
+      /**
+       * Asserts JavaScript object that corresponds to the Node has a property with given value.
+       */
+      toHaveProp(name: string, value: any, options?: { timeout?: number }): Promise<R>;
+
+      /**
+       * Asserts that DOM node has a given CSS class.
+       */
+      toHaveClass(className: string, options?: { timeout?: number }): Promise<R>;
+    }
   }
 }