Current File : //usr/share/nodejs/@types/node/assert.d.ts
/**
* The `assert` module provides a set of assertion functions for verifying
* invariants.
* @see [source](https://github.com/nodejs/node/blob/v18.0.0/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 `assert` module
* will be instances of the `AssertionError` class.
*/
class AssertionError extends Error {
actual: unknown;
expected: unknown;
operator: string;
generatedMessage: boolean;
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 currently experimental and behavior might still change.
* @since v14.2.0, v12.19.0
* @experimental
*/
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 '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: this, arguments: [1, 2, 3 ] }]);
* ```
*
* @since v18.8.0, v16.18.0
* @param fn
* @returns An Array with 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 'assert';
*
* // Creates call tracker.
* const tracker = new assert.CallTracker();
*
* function func() {}
*
* function foo() {}
*
* // 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()
* 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 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
* tracker.getCalls(callsfunc).length === 1;
*
* tracker.reset(callsfunc);
* 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 '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 '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 '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 '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 '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 '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 'assert';
*
* const obj1 = {
* a: {
* b: 1
* }
* };
* const obj2 = {
* a: {
* b: 2
* }
* };
* const obj3 = {
* a: {
* b: 1
* }
* };
* const obj4 = Object.create(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 '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 '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 '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 '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:
* 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:
* 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 '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 '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 '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 '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 '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 '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 '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 '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 'assert/strict';
*
* await assert.rejects(
* async () => {
* throw new TypeError('Wrong value');
* },
* {
* name: 'TypeError',
* message: 'Wrong value'
* }
* );
* ```
*
* ```js
* import assert from '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 '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 'assert/strict';
*
* await assert.doesNotReject(
* async () => {
* throw new TypeError('Wrong value');
* },
* SyntaxError
* );
* ```
*
* ```js
* import assert from '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 '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 '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;
}
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