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Editing: 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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