File size: 41,643 Bytes
f9f0fec |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 |
/**
* The `node:assert` module provides a set of assertion functions for verifying
* invariants.
* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/assert.js)
*/
declare module "assert" {
/**
* An alias of {@link ok}.
* @since v0.5.9
* @param value The input that is checked for being truthy.
*/
function assert(value: unknown, message?: string | Error): asserts value;
namespace assert {
/**
* Indicates the failure of an assertion. All errors thrown by the `node:assert`module will be instances of the `AssertionError` class.
*/
class AssertionError extends Error {
/**
* Set to the `actual` argument for methods such as {@link assert.strictEqual()}.
*/
actual: unknown;
/**
* Set to the `expected` argument for methods such as {@link assert.strictEqual()}.
*/
expected: unknown;
/**
* Set to the passed in operator value.
*/
operator: string;
/**
* Indicates if the message was auto-generated (`true`) or not.
*/
generatedMessage: boolean;
/**
* Value is always `ERR_ASSERTION` to show that the error is an assertion error.
*/
code: "ERR_ASSERTION";
constructor(options?: {
/** If provided, the error message is set to this value. */
message?: string | undefined;
/** The `actual` property on the error instance. */
actual?: unknown | undefined;
/** The `expected` property on the error instance. */
expected?: unknown | undefined;
/** The `operator` property on the error instance. */
operator?: string | undefined;
/** If provided, the generated stack trace omits frames before this function. */
// eslint-disable-next-line @typescript-eslint/ban-types
stackStartFn?: Function | undefined;
});
}
/**
* This feature is deprecated and will be removed in a future version.
* Please consider using alternatives such as the `mock` helper function.
* @since v14.2.0, v12.19.0
* @deprecated Deprecated
*/
class CallTracker {
/**
* The wrapper function is expected to be called exactly `exact` times. If the
* function has not been called exactly `exact` times when `tracker.verify()` is called, then `tracker.verify()` will throw an
* error.
*
* ```js
* import assert from 'node:assert';
*
* // Creates call tracker.
* const tracker = new assert.CallTracker();
*
* function func() {}
*
* // Returns a function that wraps func() that must be called exact times
* // before tracker.verify().
* const callsfunc = tracker.calls(func);
* ```
* @since v14.2.0, v12.19.0
* @param [fn='A no-op function']
* @param [exact=1]
* @return that wraps `fn`.
*/
calls(exact?: number): () => void;
calls<Func extends (...args: any[]) => any>(fn?: Func, exact?: number): Func;
/**
* Example:
*
* ```js
* import assert from 'node:assert';
*
* const tracker = new assert.CallTracker();
*
* function func() {}
* const callsfunc = tracker.calls(func);
* callsfunc(1, 2, 3);
*
* assert.deepStrictEqual(tracker.getCalls(callsfunc),
* [{ thisArg: undefined, arguments: [1, 2, 3] }]);
* ```
* @since v18.8.0, v16.18.0
* @param fn
* @return An Array with all the calls to a tracked function.
*/
getCalls(fn: Function): CallTrackerCall[];
/**
* The arrays contains information about the expected and actual number of calls of
* the functions that have not been called the expected number of times.
*
* ```js
* import assert from 'node:assert';
*
* // Creates call tracker.
* const tracker = new assert.CallTracker();
*
* function func() {}
*
* // Returns a function that wraps func() that must be called exact times
* // before tracker.verify().
* const callsfunc = tracker.calls(func, 2);
*
* // Returns an array containing information on callsfunc()
* console.log(tracker.report());
* // [
* // {
* // message: 'Expected the func function to be executed 2 time(s) but was
* // executed 0 time(s).',
* // actual: 0,
* // expected: 2,
* // operator: 'func',
* // stack: stack trace
* // }
* // ]
* ```
* @since v14.2.0, v12.19.0
* @return An Array of objects containing information about the wrapper functions returned by `calls`.
*/
report(): CallTrackerReportInformation[];
/**
* Reset calls of the call tracker.
* If a tracked function is passed as an argument, the calls will be reset for it.
* If no arguments are passed, all tracked functions will be reset.
*
* ```js
* import assert from 'node:assert';
*
* const tracker = new assert.CallTracker();
*
* function func() {}
* const callsfunc = tracker.calls(func);
*
* callsfunc();
* // Tracker was called once
* assert.strictEqual(tracker.getCalls(callsfunc).length, 1);
*
* tracker.reset(callsfunc);
* assert.strictEqual(tracker.getCalls(callsfunc).length, 0);
* ```
* @since v18.8.0, v16.18.0
* @param fn a tracked function to reset.
*/
reset(fn?: Function): void;
/**
* Iterates through the list of functions passed to `tracker.calls()` and will throw an error for functions that
* have not been called the expected number of times.
*
* ```js
* import assert from 'node:assert';
*
* // Creates call tracker.
* const tracker = new assert.CallTracker();
*
* function func() {}
*
* // Returns a function that wraps func() that must be called exact times
* // before tracker.verify().
* const callsfunc = tracker.calls(func, 2);
*
* callsfunc();
*
* // Will throw an error since callsfunc() was only called once.
* tracker.verify();
* ```
* @since v14.2.0, v12.19.0
*/
verify(): void;
}
interface CallTrackerCall {
thisArg: object;
arguments: unknown[];
}
interface CallTrackerReportInformation {
message: string;
/** The actual number of times the function was called. */
actual: number;
/** The number of times the function was expected to be called. */
expected: number;
/** The name of the function that is wrapped. */
operator: string;
/** A stack trace of the function. */
stack: object;
}
type AssertPredicate = RegExp | (new() => object) | ((thrown: unknown) => boolean) | object | Error;
/**
* Throws an `AssertionError` with the provided error message or a default
* error message. If the `message` parameter is an instance of an `Error` then
* it will be thrown instead of the `AssertionError`.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.fail();
* // AssertionError [ERR_ASSERTION]: Failed
*
* assert.fail('boom');
* // AssertionError [ERR_ASSERTION]: boom
*
* assert.fail(new TypeError('need array'));
* // TypeError: need array
* ```
*
* Using `assert.fail()` with more than two arguments is possible but deprecated.
* See below for further details.
* @since v0.1.21
* @param [message='Failed']
*/
function fail(message?: string | Error): never;
/** @deprecated since v10.0.0 - use fail([message]) or other assert functions instead. */
function fail(
actual: unknown,
expected: unknown,
message?: string | Error,
operator?: string,
// eslint-disable-next-line @typescript-eslint/ban-types
stackStartFn?: Function,
): never;
/**
* Tests if `value` is truthy. It is equivalent to`assert.equal(!!value, true, message)`.
*
* If `value` is not truthy, an `AssertionError` is thrown with a `message`property set equal to the value of the `message` parameter. If the `message`parameter is `undefined`, a default
* error message is assigned. If the `message`parameter is an instance of an `Error` then it will be thrown instead of the`AssertionError`.
* If no arguments are passed in at all `message` will be set to the string:`` 'No value argument passed to `assert.ok()`' ``.
*
* Be aware that in the `repl` the error message will be different to the one
* thrown in a file! See below for further details.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.ok(true);
* // OK
* assert.ok(1);
* // OK
*
* assert.ok();
* // AssertionError: No value argument passed to `assert.ok()`
*
* assert.ok(false, 'it\'s false');
* // AssertionError: it's false
*
* // In the repl:
* assert.ok(typeof 123 === 'string');
* // AssertionError: false == true
*
* // In a file (e.g. test.js):
* assert.ok(typeof 123 === 'string');
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(typeof 123 === 'string')
*
* assert.ok(false);
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(false)
*
* assert.ok(0);
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert.ok(0)
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* // Using `assert()` works the same:
* assert(0);
* // AssertionError: The expression evaluated to a falsy value:
* //
* // assert(0)
* ```
* @since v0.1.21
*/
function ok(value: unknown, message?: string | Error): asserts value;
/**
* **Strict assertion mode**
*
* An alias of {@link strictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link strictEqual} instead.
*
* Tests shallow, coercive equality between the `actual` and `expected` parameters
* using the [`==` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality). `NaN` is specially handled
* and treated as being identical if both sides are `NaN`.
*
* ```js
* import assert from 'node:assert';
*
* assert.equal(1, 1);
* // OK, 1 == 1
* assert.equal(1, '1');
* // OK, 1 == '1'
* assert.equal(NaN, NaN);
* // OK
*
* assert.equal(1, 2);
* // AssertionError: 1 == 2
* assert.equal({ a: { b: 1 } }, { a: { b: 1 } });
* // AssertionError: { a: { b: 1 } } == { a: { b: 1 } }
* ```
*
* If the values are not equal, an `AssertionError` is thrown with a `message`property set equal to the value of the `message` parameter. If the `message`parameter is undefined, a default
* error message is assigned. If the `message`parameter is an instance of an `Error` then it will be thrown instead of the`AssertionError`.
* @since v0.1.21
*/
function equal(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link notStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link notStrictEqual} instead.
*
* Tests shallow, coercive inequality with the [`!=` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Inequality). `NaN` is
* specially handled and treated as being identical if both sides are `NaN`.
*
* ```js
* import assert from 'node:assert';
*
* assert.notEqual(1, 2);
* // OK
*
* assert.notEqual(1, 1);
* // AssertionError: 1 != 1
*
* assert.notEqual(1, '1');
* // AssertionError: 1 != '1'
* ```
*
* If the values are equal, an `AssertionError` is thrown with a `message`property set equal to the value of the `message` parameter. If the `message`parameter is undefined, a default error
* message is assigned. If the `message`parameter is an instance of an `Error` then it will be thrown instead of the`AssertionError`.
* @since v0.1.21
*/
function notEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link deepStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link deepStrictEqual} instead.
*
* Tests for deep equality between the `actual` and `expected` parameters. Consider
* using {@link deepStrictEqual} instead. {@link deepEqual} can have
* surprising results.
*
* _Deep equality_ means that the enumerable "own" properties of child objects
* are also recursively evaluated by the following rules.
* @since v0.1.21
*/
function deepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* **Strict assertion mode**
*
* An alias of {@link notDeepStrictEqual}.
*
* **Legacy assertion mode**
*
* > Stability: 3 - Legacy: Use {@link notDeepStrictEqual} instead.
*
* Tests for any deep inequality. Opposite of {@link deepEqual}.
*
* ```js
* import assert from 'node:assert';
*
* const obj1 = {
* a: {
* b: 1,
* },
* };
* const obj2 = {
* a: {
* b: 2,
* },
* };
* const obj3 = {
* a: {
* b: 1,
* },
* };
* const obj4 = { __proto__: obj1 };
*
* assert.notDeepEqual(obj1, obj1);
* // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
*
* assert.notDeepEqual(obj1, obj2);
* // OK
*
* assert.notDeepEqual(obj1, obj3);
* // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
*
* assert.notDeepEqual(obj1, obj4);
* // OK
* ```
*
* If the values are deeply equal, an `AssertionError` is thrown with a`message` property set equal to the value of the `message` parameter. If the`message` parameter is undefined, a default
* error message is assigned. If the`message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function notDeepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Tests strict equality between the `actual` and `expected` parameters as
* determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.strictEqual(1, 2);
* // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
* //
* // 1 !== 2
*
* assert.strictEqual(1, 1);
* // OK
*
* assert.strictEqual('Hello foobar', 'Hello World!');
* // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
* // + actual - expected
* //
* // + 'Hello foobar'
* // - 'Hello World!'
* // ^
*
* const apples = 1;
* const oranges = 2;
* assert.strictEqual(apples, oranges, `apples ${apples} !== oranges ${oranges}`);
* // AssertionError [ERR_ASSERTION]: apples 1 !== oranges 2
*
* assert.strictEqual(1, '1', new TypeError('Inputs are not identical'));
* // TypeError: Inputs are not identical
* ```
*
* If the values are not strictly equal, an `AssertionError` is thrown with a`message` property set equal to the value of the `message` parameter. If the`message` parameter is undefined, a
* default error message is assigned. If the`message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function strictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
/**
* Tests strict inequality between the `actual` and `expected` parameters as
* determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.notStrictEqual(1, 2);
* // OK
*
* assert.notStrictEqual(1, 1);
* // AssertionError [ERR_ASSERTION]: Expected "actual" to be strictly unequal to:
* //
* // 1
*
* assert.notStrictEqual(1, '1');
* // OK
* ```
*
* If the values are strictly equal, an `AssertionError` is thrown with a`message` property set equal to the value of the `message` parameter. If the`message` parameter is undefined, a
* default error message is assigned. If the`message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v0.1.21
*/
function notStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Tests for deep equality between the `actual` and `expected` parameters.
* "Deep" equality means that the enumerable "own" properties of child objects
* are recursively evaluated also by the following rules.
* @since v1.2.0
*/
function deepStrictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
/**
* Tests for deep strict inequality. Opposite of {@link deepStrictEqual}.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.notDeepStrictEqual({ a: 1 }, { a: '1' });
* // OK
* ```
*
* If the values are deeply and strictly equal, an `AssertionError` is thrown
* with a `message` property set equal to the value of the `message` parameter. If
* the `message` parameter is undefined, a default error message is assigned. If
* the `message` parameter is an instance of an `Error` then it will be thrown
* instead of the `AssertionError`.
* @since v1.2.0
*/
function notDeepStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
/**
* Expects the function `fn` to throw an error.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
* a validation object where each property will be tested for strict deep equality,
* or an instance of error where each property will be tested for strict deep
* equality including the non-enumerable `message` and `name` properties. When
* using an object, it is also possible to use a regular expression, when
* validating against a string property. See below for examples.
*
* If specified, `message` will be appended to the message provided by the`AssertionError` if the `fn` call fails to throw or in case the error validation
* fails.
*
* Custom validation object/error instance:
*
* ```js
* import assert from 'node:assert/strict';
*
* const err = new TypeError('Wrong value');
* err.code = 404;
* err.foo = 'bar';
* err.info = {
* nested: true,
* baz: 'text',
* };
* err.reg = /abc/i;
*
* assert.throws(
* () => {
* throw err;
* },
* {
* name: 'TypeError',
* message: 'Wrong value',
* info: {
* nested: true,
* baz: 'text',
* },
* // Only properties on the validation object will be tested for.
* // Using nested objects requires all properties to be present. Otherwise
* // the validation is going to fail.
* },
* );
*
* // Using regular expressions to validate error properties:
* assert.throws(
* () => {
* throw err;
* },
* {
* // The `name` and `message` properties are strings and using regular
* // expressions on those will match against the string. If they fail, an
* // error is thrown.
* name: /^TypeError$/,
* message: /Wrong/,
* foo: 'bar',
* info: {
* nested: true,
* // It is not possible to use regular expressions for nested properties!
* baz: 'text',
* },
* // The `reg` property contains a regular expression and only if the
* // validation object contains an identical regular expression, it is going
* // to pass.
* reg: /abc/i,
* },
* );
*
* // Fails due to the different `message` and `name` properties:
* assert.throws(
* () => {
* const otherErr = new Error('Not found');
* // Copy all enumerable properties from `err` to `otherErr`.
* for (const [key, value] of Object.entries(err)) {
* otherErr[key] = value;
* }
* throw otherErr;
* },
* // The error's `message` and `name` properties will also be checked when using
* // an error as validation object.
* err,
* );
* ```
*
* Validate instanceof using constructor:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* Error,
* );
* ```
*
* Validate error message using [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions):
*
* Using a regular expression runs `.toString` on the error object, and will
* therefore also include the error name.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* /^Error: Wrong value$/,
* );
* ```
*
* Custom error validation:
*
* The function must return `true` to indicate all internal validations passed.
* It will otherwise fail with an `AssertionError`.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.throws(
* () => {
* throw new Error('Wrong value');
* },
* (err) => {
* assert(err instanceof Error);
* assert(/value/.test(err));
* // Avoid returning anything from validation functions besides `true`.
* // Otherwise, it's not clear what part of the validation failed. Instead,
* // throw an error about the specific validation that failed (as done in this
* // example) and add as much helpful debugging information to that error as
* // possible.
* return true;
* },
* 'unexpected error',
* );
* ```
*
* `error` cannot be a string. If a string is provided as the second
* argument, then `error` is assumed to be omitted and the string will be used for`message` instead. This can lead to easy-to-miss mistakes. Using the same
* message as the thrown error message is going to result in an`ERR_AMBIGUOUS_ARGUMENT` error. Please read the example below carefully if using
* a string as the second argument gets considered:
*
* ```js
* import assert from 'node:assert/strict';
*
* function throwingFirst() {
* throw new Error('First');
* }
*
* function throwingSecond() {
* throw new Error('Second');
* }
*
* function notThrowing() {}
*
* // The second argument is a string and the input function threw an Error.
* // The first case will not throw as it does not match for the error message
* // thrown by the input function!
* assert.throws(throwingFirst, 'Second');
* // In the next example the message has no benefit over the message from the
* // error and since it is not clear if the user intended to actually match
* // against the error message, Node.js throws an `ERR_AMBIGUOUS_ARGUMENT` error.
* assert.throws(throwingSecond, 'Second');
* // TypeError [ERR_AMBIGUOUS_ARGUMENT]
*
* // The string is only used (as message) in case the function does not throw:
* assert.throws(notThrowing, 'Second');
* // AssertionError [ERR_ASSERTION]: Missing expected exception: Second
*
* // If it was intended to match for the error message do this instead:
* // It does not throw because the error messages match.
* assert.throws(throwingSecond, /Second$/);
*
* // If the error message does not match, an AssertionError is thrown.
* assert.throws(throwingFirst, /Second$/);
* // AssertionError [ERR_ASSERTION]
* ```
*
* Due to the confusing error-prone notation, avoid a string as the second
* argument.
* @since v0.1.21
*/
function throws(block: () => unknown, message?: string | Error): void;
function throws(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
/**
* Asserts that the function `fn` does not throw an error.
*
* Using `assert.doesNotThrow()` is actually not useful because there
* is no benefit in catching an error and then rethrowing it. Instead, consider
* adding a comment next to the specific code path that should not throw and keep
* error messages as expressive as possible.
*
* When `assert.doesNotThrow()` is called, it will immediately call the `fn`function.
*
* If an error is thrown and it is the same type as that specified by the `error`parameter, then an `AssertionError` is thrown. If the error is of a
* different type, or if the `error` parameter is undefined, the error is
* propagated back to the caller.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
* function. See {@link throws} for more details.
*
* The following, for instance, will throw the `TypeError` because there is no
* matching error type in the assertion:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* SyntaxError,
* );
* ```
*
* However, the following will result in an `AssertionError` with the message
* 'Got unwanted exception...':
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* TypeError,
* );
* ```
*
* If an `AssertionError` is thrown and a value is provided for the `message`parameter, the value of `message` will be appended to the `AssertionError` message:
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotThrow(
* () => {
* throw new TypeError('Wrong value');
* },
* /Wrong value/,
* 'Whoops',
* );
* // Throws: AssertionError: Got unwanted exception: Whoops
* ```
* @since v0.1.21
*/
function doesNotThrow(block: () => unknown, message?: string | Error): void;
function doesNotThrow(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
/**
* Throws `value` if `value` is not `undefined` or `null`. This is useful when
* testing the `error` argument in callbacks. The stack trace contains all frames
* from the error passed to `ifError()` including the potential new frames for`ifError()` itself.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.ifError(null);
* // OK
* assert.ifError(0);
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 0
* assert.ifError('error');
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 'error'
* assert.ifError(new Error());
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: Error
*
* // Create some random error frames.
* let err;
* (function errorFrame() {
* err = new Error('test error');
* })();
*
* (function ifErrorFrame() {
* assert.ifError(err);
* })();
* // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: test error
* // at ifErrorFrame
* // at errorFrame
* ```
* @since v0.1.97
*/
function ifError(value: unknown): asserts value is null | undefined;
/**
* Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
* calls the function and awaits the returned promise to complete. It will then
* check that the promise is rejected.
*
* If `asyncFn` is a function and it throws an error synchronously,`assert.rejects()` will return a rejected `Promise` with that error. If the
* function does not return a promise, `assert.rejects()` will return a rejected`Promise` with an `ERR_INVALID_RETURN_VALUE` error. In both cases the error
* handler is skipped.
*
* Besides the async nature to await the completion behaves identically to {@link throws}.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
* an object where each property will be tested for, or an instance of error where
* each property will be tested for including the non-enumerable `message` and`name` properties.
*
* If specified, `message` will be the message provided by the `AssertionError` if the `asyncFn` fails to reject.
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.rejects(
* async () => {
* throw new TypeError('Wrong value');
* },
* {
* name: 'TypeError',
* message: 'Wrong value',
* },
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.rejects(
* async () => {
* throw new TypeError('Wrong value');
* },
* (err) => {
* assert.strictEqual(err.name, 'TypeError');
* assert.strictEqual(err.message, 'Wrong value');
* return true;
* },
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.rejects(
* Promise.reject(new Error('Wrong value')),
* Error,
* ).then(() => {
* // ...
* });
* ```
*
* `error` cannot be a string. If a string is provided as the second
* argument, then `error` is assumed to be omitted and the string will be used for`message` instead. This can lead to easy-to-miss mistakes. Please read the
* example in {@link throws} carefully if using a string as the second
* argument gets considered.
* @since v10.0.0
*/
function rejects(block: (() => Promise<unknown>) | Promise<unknown>, message?: string | Error): Promise<void>;
function rejects(
block: (() => Promise<unknown>) | Promise<unknown>,
error: AssertPredicate,
message?: string | Error,
): Promise<void>;
/**
* Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
* calls the function and awaits the returned promise to complete. It will then
* check that the promise is not rejected.
*
* If `asyncFn` is a function and it throws an error synchronously,`assert.doesNotReject()` will return a rejected `Promise` with that error. If
* the function does not return a promise, `assert.doesNotReject()` will return a
* rejected `Promise` with an `ERR_INVALID_RETURN_VALUE` error. In both cases
* the error handler is skipped.
*
* Using `assert.doesNotReject()` is actually not useful because there is little
* benefit in catching a rejection and then rejecting it again. Instead, consider
* adding a comment next to the specific code path that should not reject and keep
* error messages as expressive as possible.
*
* If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
* [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
* function. See {@link throws} for more details.
*
* Besides the async nature to await the completion behaves identically to {@link doesNotThrow}.
*
* ```js
* import assert from 'node:assert/strict';
*
* await assert.doesNotReject(
* async () => {
* throw new TypeError('Wrong value');
* },
* SyntaxError,
* );
* ```
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotReject(Promise.reject(new TypeError('Wrong value')))
* .then(() => {
* // ...
* });
* ```
* @since v10.0.0
*/
function doesNotReject(
block: (() => Promise<unknown>) | Promise<unknown>,
message?: string | Error,
): Promise<void>;
function doesNotReject(
block: (() => Promise<unknown>) | Promise<unknown>,
error: AssertPredicate,
message?: string | Error,
): Promise<void>;
/**
* Expects the `string` input to match the regular expression.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.match('I will fail', /pass/);
* // AssertionError [ERR_ASSERTION]: The input did not match the regular ...
*
* assert.match(123, /pass/);
* // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
*
* assert.match('I will pass', /pass/);
* // OK
* ```
*
* If the values do not match, or if the `string` argument is of another type than`string`, an `AssertionError` is thrown with a `message` property set equal
* to the value of the `message` parameter. If the `message` parameter is
* undefined, a default error message is assigned. If the `message` parameter is an
* instance of an `Error` then it will be thrown instead of the `AssertionError`.
* @since v13.6.0, v12.16.0
*/
function match(value: string, regExp: RegExp, message?: string | Error): void;
/**
* Expects the `string` input not to match the regular expression.
*
* ```js
* import assert from 'node:assert/strict';
*
* assert.doesNotMatch('I will fail', /fail/);
* // AssertionError [ERR_ASSERTION]: The input was expected to not match the ...
*
* assert.doesNotMatch(123, /pass/);
* // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
*
* assert.doesNotMatch('I will pass', /different/);
* // OK
* ```
*
* If the values do match, or if the `string` argument is of another type than`string`, an `AssertionError` is thrown with a `message` property set equal
* to the value of the `message` parameter. If the `message` parameter is
* undefined, a default error message is assigned. If the `message` parameter is an
* instance of an `Error` then it will be thrown instead of the `AssertionError`.
* @since v13.6.0, v12.16.0
*/
function doesNotMatch(value: string, regExp: RegExp, message?: string | Error): void;
const strict:
& Omit<
typeof assert,
| "equal"
| "notEqual"
| "deepEqual"
| "notDeepEqual"
| "ok"
| "strictEqual"
| "deepStrictEqual"
| "ifError"
| "strict"
>
& {
(value: unknown, message?: string | Error): asserts value;
equal: typeof strictEqual;
notEqual: typeof notStrictEqual;
deepEqual: typeof deepStrictEqual;
notDeepEqual: typeof notDeepStrictEqual;
// Mapped types and assertion functions are incompatible?
// TS2775: Assertions require every name in the call target
// to be declared with an explicit type annotation.
ok: typeof ok;
strictEqual: typeof strictEqual;
deepStrictEqual: typeof deepStrictEqual;
ifError: typeof ifError;
strict: typeof strict;
};
}
export = assert;
}
declare module "node:assert" {
import assert = require("assert");
export = assert;
}
|