'use strict';

const { mustCall, hasCrypto } = require('../common');

const assert = require('assert');

const util = require('util');

const { test } = require('node:test');

const { AssertionError } = assert;

const defaultMsgStart = 'Expected values to be strictly deep-equal:\n';

const defaultMsgStartFull = `${defaultMsgStart}+ actual - expected`;

// Disable colored output to prevent color codes from breaking assertion

// message comparisons. This should only be an issue when process.stdout

// is a TTY.

if (process.stdout.isTTY)

process.env.NODE_DISABLE_COLORS = '1';

// Template tag function turning an error message into a RegExp

// for assert.throws()

function re(literals, ...values) {

let result = 'Expected values to be loosely deep-equal:\n\n';

for (const [i, value] of values.entries()) {

const str = util.inspect(value, {

compact: false,

depth: 1000,

customInspect: false,

maxArrayLength: Infinity,

breakLength: Infinity,

sorted: true,

getters: true

});

// Need to escape special characters.

result += `${str}${literals[i + 1]}`;

}

return {

code: 'ERR_ASSERTION',

message: result

};

}

const date = new Date('2016');

class MyDate extends Date {

constructor(...args) {

super(...args);

this[0] = '1';

}

}

const date2 = new MyDate('2016');

class MyRegExp extends RegExp {

constructor(...args) {

super(...args);

this[0] = '1';

}

}

// The following deepEqual tests might seem very weird.

// They just describe what it is now.

// That is why we discourage using deepEqual in our own tests.

// Turn off no-restricted-properties because we are testing deepEqual!

/* eslint-disable no-restricted-properties */

test('deepEqual', () => {

const arr = new Uint8Array([120, 121, 122, 10]);

const buf = Buffer.from(arr);

// They have different [[Prototype]]

assert.throws(

() => assert.deepStrictEqual(arr, buf),

{

code: 'ERR_ASSERTION',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ Uint8Array(4) [\n' +

'- Buffer(4) [Uint8Array] [\n' +

' 120,\n' +

' 121,\n' +

' 122,\n' +

' 10\n' +

' ]\n'

}

);

assert.deepEqual(arr, buf);

{

const buf2 = Buffer.from(arr);

buf2.prop = 1;

assert.throws(

() => assert.deepStrictEqual(buf2, buf),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

' Buffer(4) [Uint8Array] [\n' +

' 120,\n' +

' 121,\n' +

' 122,\n' +

' 10,\n' +

'+ prop: 1\n' +

' ]\n'

}

);

assert.notDeepEqual(buf2, buf);

}

{

const arr2 = new Uint8Array([120, 121, 122, 10]);

arr2.prop = 5;

assert.throws(

() => assert.deepStrictEqual(arr, arr2),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

' Uint8Array(4) [\n' +

' 120,\n' +

' 121,\n' +

' 122,\n' +

' 10,\n' +

'- prop: 5\n' +

' ]\n'

}

);

assert.notDeepEqual(arr, arr2);

}

});

test('loose deepEqual', () => {

assertOnlyDeepEqual([null, undefined, undefined], [null, undefined, null]);

assertNotDeepOrStrict([null, undefined, undefined, 1], [null, undefined, null, 2]);

});

test('date', () => {

assertNotDeepOrStrict(date, date2);

assert.throws(

() => assert.deepStrictEqual(date, date2),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

'+ 2016-01-01T00:00:00.000Z\n- MyDate 2016-01-01T00:00:00.000Z' +

" {\n- '0': '1'\n- }\n"

}

);

assert.throws(

() => assert.deepStrictEqual(date2, date),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

'+ MyDate 2016-01-01T00:00:00.000Z {\n' +

"+ '0': '1'\n+ }\n- 2016-01-01T00:00:00.000Z\n"

}

);

});

test('regexp', () => {

const re1 = new RegExp('test');

const re2 = new MyRegExp('test');

assertNotDeepOrStrict(re1, re2);

assert.throws(

() => assert.deepStrictEqual(re1, re2),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

"+ /test/\n- MyRegExp /test/ {\n- '0': '1'\n- }\n"

}

);

});

// For these weird cases, deepEqual should pass (at least for now),

// but deepStrictEqual should throw.

test('deepEqual should pass for these weird cases', () => {

const re2 = new MyRegExp('test');

const similar = new Set([

{ 0: 1 }, // Object

new String('1'), // Object

[1], // Array

date2, // Date with this[0] = '1'

re2, // RegExp with this[0] = '1'

new Int8Array([1]), // Int8Array

new Int16Array([1]), // Int16Array

new Uint16Array([1]), // Uint16Array

new Int32Array([1]), // Int32Array

new Uint32Array([1]), // Uint32Array

Buffer.from([1]), // Uint8Array

(function() { return arguments; })(1),

]);

for (const a of similar) {

for (const b of similar) {

if (a !== b) {

assert.notDeepEqual(a, b);

assert.throws(

() => assert.deepStrictEqual(a, b),

{ code: 'ERR_ASSERTION' }

);

}

}

}

});

function assertDeepAndStrictEqual(a, b) {

assert.deepEqual(a, b);

assert.deepStrictEqual(a, b);

assert.partialDeepStrictEqual(a, b);

assert.deepEqual(b, a);

assert.deepStrictEqual(b, a);

assert.partialDeepStrictEqual(b, a);

}

function assertNotDeepOrStrict(a, b, err, options) {

assert.throws(

() => assert.deepEqual(a, b),

err || re`${a}\n\nshould loosely deep-equal\n\n${b}`

);

assert.throws(

() => assert.deepStrictEqual(a, b),

err || { code: 'ERR_ASSERTION' }

);

assert.throws(

() => assert.deepEqual(b, a),

err || re`${b}\n\nshould loosely deep-equal\n\n${a}`

);

assert.throws(

() => assert.deepStrictEqual(b, a),

err || { code: 'ERR_ASSERTION' }

);

const partial = mustCall(() => {

assert.partialDeepStrictEqual(b, a);

assert.partialDeepStrictEqual(a, b);

});

if (options?.partial === 'pass') {

partial();

} else {

assert.throws(partial, err || { code: 'ERR_ASSERTION' });

}

}

function assertOnlyDeepEqual(a, b, err) {

assert.deepEqual(a, b);

assert.throws(

() => assert.deepStrictEqual(a, b),

err || { code: 'ERR_ASSERTION' }

);

assert.deepEqual(b, a);

assert.throws(

() => assert.deepStrictEqual(b, a),

err || { code: 'ERR_ASSERTION' }

);

const partial = mustCall(() => {

assert.partialDeepStrictEqual(b, a);

assert.partialDeepStrictEqual(a, b);

});

assert.throws(partial, err || { code: 'ERR_ASSERTION' });

}

test('es6 Maps and Sets', () => {

assertDeepAndStrictEqual(new Set(), new Set());

assertDeepAndStrictEqual(new Map(), new Map());

assertDeepAndStrictEqual(new Set([1, 2, 3]), new Set([1, 2, 3]));

assertNotDeepOrStrict(new Set([1, 2, 3]), new Set([1, 2, 3, 4]));

assertNotDeepOrStrict(new Set([1, 2, 3, 4]), new Set([1, 2, 3]));

assertDeepAndStrictEqual(new Set(['1', '2', '3']), new Set(['1', '2', '3']));

assertDeepAndStrictEqual(new Set([[1, 2], [3, 4]]), new Set([[3, 4], [1, 2]]));

assertNotDeepOrStrict(new Set([{ a: 0 }]), new Set([{ a: 1 }]));

assertNotDeepOrStrict(new Set([Symbol()]), new Set([Symbol()]));

{

const a = [ 1, 2 ];

const b = [ 3, 4 ];

const c = [ 1, 2 ];

const d = [ 3, 4 ];

assertDeepAndStrictEqual(

{ a: a, b: b, s: new Set([a, b]) },

{ a: c, b: d, s: new Set([d, c]) }

);

}

assertDeepAndStrictEqual(new Map([[1, 1], [2, 2]]), new Map([[1, 1], [2, 2]]));

assertDeepAndStrictEqual(new Map([[1, 1], [2, 2]]), new Map([[2, 2], [1, 1]]));

assertNotDeepOrStrict(new Map([[1, 1], [2, 2]]), new Map([[1, 2], [2, 1]]));

assertNotDeepOrStrict(

new Map([[[1], 1], [{}, 2]]),

new Map([[[1], 2], [{}, 1]])

);

assertNotDeepOrStrict(new Set([1]), [1]);

assertNotDeepOrStrict(new Set(), []);

assertNotDeepOrStrict(new Set(), {});

assertNotDeepOrStrict(new Map([['a', 1]]), { a: 1 });

assertNotDeepOrStrict(new Map(), []);

assertNotDeepOrStrict(new Map(), {});

assertOnlyDeepEqual(new Set(['1']), new Set([1]));

assertOnlyDeepEqual(new Map([['1', 'a']]), new Map([[1, 'a']]));

assertOnlyDeepEqual(new Map([['a', '1']]), new Map([['a', 1]]));

assertNotDeepOrStrict(new Map([['a', '1']]), new Map([['a', 2]]));

assertDeepAndStrictEqual(new Set([{}]), new Set([{}]));

// Ref: https://github.com/nodejs/node/issues/13347

assertNotDeepOrStrict(

new Set([{ a: 1 }, { a: 1 }]),

new Set([{ a: 1 }, { a: 2 }])

);

assertNotDeepOrStrict(

new Set([{ a: 1 }, { a: 1 }, { a: 2 }]),

new Set([{ a: 1 }, { a: 2 }, { a: 2 }])

);

assertNotDeepOrStrict(

new Map([[{ x: 1 }, 5], [{ x: 1 }, 5]]),

new Map([[{ x: 1 }, 5], [{ x: 2 }, 5]])

);

assertNotDeepOrStrict(new Set([3, '3']), new Set([3, 4]));

assertNotDeepOrStrict(new Map([[3, 0], ['3', 0]]), new Map([[3, 0], [4, 0]]));

assertNotDeepOrStrict(

new Set([{ a: 1 }, { a: 1 }, { a: 2 }]),

new Set([{ a: 1 }, { a: 2 }, { a: 2 }])

);

// Mixed primitive and object keys

assertDeepAndStrictEqual(

new Map([[1, 'a'], [{}, 'a']]),

new Map([[1, 'a'], [{}, 'a']])

);

assertDeepAndStrictEqual(

new Set([1, 'a', [{}, 'a']]),

new Set([1, 'a', [{}, 'a']])

);

// This is an awful case, where a map contains multiple equivalent keys:

assertOnlyDeepEqual(

new Map([[1, 'a'], ['1', 'b']]),

new Map([['1', 'a'], [true, 'b']])

);

assertNotDeepOrStrict(

new Set(['a']),

new Set(['b'])

);

assertDeepAndStrictEqual(

new Map([[{}, 'a'], [{}, 'b']]),

new Map([[{}, 'b'], [{}, 'a']])

);

assertOnlyDeepEqual(

new Map([[true, 'a'], ['1', 'b'], [1, 'a']]),

new Map([['1', 'a'], [1, 'b'], [true, 'a']])

);

assertNotDeepOrStrict(

new Map([[true, 'a'], ['1', 'b'], [1, 'c']]),

new Map([['1', 'a'], [1, 'b'], [true, 'a']])

);

// Similar object keys

assertNotDeepOrStrict(

new Set([{}, {}]),

new Set([{}, 1])

);

assertNotDeepOrStrict(

new Set([[{}, 1], [{}, 1]]),

new Set([[{}, 1], [1, 1]])

);

assertNotDeepOrStrict(

new Map([[{}, 1], [{}, 1]]),

new Map([[{}, 1], [1, 1]])

);

assertOnlyDeepEqual(

new Map([[{}, 1], [true, 1]]),

new Map([[{}, 1], [1, 1]])

);

// Similar primitive key / values

assertNotDeepOrStrict(

new Set([1, true, false]),

new Set(['1', 0, '0'])

);

assertNotDeepOrStrict(

new Map([[1, 5], [true, 5], [false, 5]]),

new Map([['1', 5], [0, 5], ['0', 5]])

);

// Undefined value in Map

assertDeepAndStrictEqual(

new Map([[1, undefined]]),

new Map([[1, undefined]])

);

assertOnlyDeepEqual(

new Map([[1, null], ['', '0']]),

new Map([['1', undefined], [false, 0]])

);

assertNotDeepOrStrict(

new Map([[1, undefined]]),

new Map([[2, undefined]])

);

// null as key

assertDeepAndStrictEqual(

new Map([[null, 3]]),

new Map([[null, 3]])

);

assertOnlyDeepEqual(

new Map([[undefined, null], ['+000', 2n]]),

new Map([[null, undefined], [false, '2']]),

);

const xarray = ['x'];

assertDeepAndStrictEqual(

new Set([xarray, ['y']]),

new Set([xarray, ['y']])

);

assertDeepAndStrictEqual(

new Set([2, xarray, ['y'], 1]),

new Set([xarray, ['y'], 1, 2])

);

assertDeepAndStrictEqual(

new Set([{ a: 1 }, { a: 3 }, { a: 2 }, { a: 4 }]),

new Set([{ a: 2 }, { a: 1 }, { a: 4 }, { a: 3 }])

);

assertNotDeepOrStrict(

new Set([{ a: 1 }, { a: 2 }, { a: 3 }, { a: 4 }]),

new Set([{ a: 1 }, { a: 2 }, { a: 3 }, { a: 5 }])

);

assertOnlyDeepEqual(

new Set([null, '', 1n, 5, 2n, false]),

new Set([undefined, 0, 5n, true, '2', '-000'])

);

assertNotDeepOrStrict(

new Set(['']),

new Set(['0'])

);

assertOnlyDeepEqual(

new Map([[1, {}]]),

new Map([[true, {}]])

);

assertOnlyDeepEqual(

new Map([[undefined, true]]),

new Map([[null, true]])

);

assertNotDeepOrStrict(

new Map([[undefined, true]]),

new Map([[true, true]])

);

{

const values = [

123,

Infinity,

0,

null,

undefined,

false,

true,

{},

[],

() => {},

];

assertDeepAndStrictEqual(new Set(values), new Set(values));

assertDeepAndStrictEqual(new Set(values), new Set(values.reverse()));

const mapValues = values.map((v) => [v, { a: 5 }]);

assertDeepAndStrictEqual(new Map(mapValues), new Map(mapValues));

assertDeepAndStrictEqual(new Map(mapValues), new Map(mapValues.reverse()));

}

{

const s1 = new Set();

const s2 = new Set();

s1.add(1);

s1.add(2);

s2.add(2);

s2.add(1);

assertDeepAndStrictEqual(s1, s2);

}

{

const m1 = new Map();

const m2 = new Map();

const obj = { a: 5, b: 6 };

m1.set(1, obj);

m1.set(2, 'hi');

m1.set(3, [1, 2, 3]);

m2.set(2, 'hi'); // different order

m2.set(1, obj);

m2.set(3, [1, 2, 3]); // Deep equal, but not reference equal.

assertDeepAndStrictEqual(m1, m2);

}

{

const m1 = new Map();

const m2 = new Map();

// m1 contains itself.

m1.set(1, m1);

m2.set(1, new Map());

assertNotDeepOrStrict(m1, m2);

}

{

const map1 = new Map([[1, 1]]);

const map2 = new Map([[1, '1']]);

assert.deepEqual(map1, map2);

assert.throws(

() => assert.deepStrictEqual(map1, map2),

{

code: 'ERR_ASSERTION',

message: `${defaultMsgStartFull}\n\n` +

" Map(1) {\n+ 1 => 1\n- 1 => '1'\n }\n"

}

);

}

{

// Two equivalent sets / maps with different key/values applied shouldn't be

// the same. This is a terrible idea to do in practice, but deepEqual should

// still check for it.

const s1 = new Set();

const s2 = new Set();

s1.x = 5;

assertNotDeepOrStrict(s1, s2);

const m1 = new Map();

const m2 = new Map();

m1.x = 5;

assertNotDeepOrStrict(m1, m2);

}

{

// Circular references.

const s1 = new Set();

s1.add(s1);

const s2 = new Set();

s2.add(s2);

assertDeepAndStrictEqual(s1, s2);

const m1 = new Map();

m1.set(2, m1);

const m2 = new Map();

m2.set(2, m2);

assertDeepAndStrictEqual(m1, m2);

const m3 = new Map();

m3.set(m3, 2);

const m4 = new Map();

m4.set(m4, 2);

assertDeepAndStrictEqual(m3, m4);

}

});

test('GH-6416. Make sure circular refs do not throw', () => {

const b = {};

b.b = b;

const c = {};

c.b = c;

assertDeepAndStrictEqual(b, c);

const d = {};

d.a = 1;

d.b = d;

const e = {};

e.a = 1;

e.b = {};

assertNotDeepOrStrict(d, e);

});

test('GH-14441. Circular structures should be consistent', () => {

{

const a = {};

a.a = a;

const b = {};

b.a = {};

b.a.a = a;

assertNotDeepOrStrict(a, b);

}

{

const a = {};

a.a = a;

const b = {};

b.a = b;

const c = {};

c.a = a;

assertNotDeepOrStrict(b, c);

}

{

const a = new Set();

a.add(a);

const b = new Set();

b.add(b);

const c = new Set();

c.add(a);

assertNotDeepOrStrict(b, c);

}

});

// https://github.com/nodejs/node-v0.x-archive/pull/7178

test('Ensure reflexivity of deepEqual with `arguments` objects.', () => {

const args = (function() { return arguments; })();

assertNotDeepOrStrict([], args);

});

test('More checking that arguments objects are handled correctly', () => {

// eslint-disable-next-line func-style

const returnArguments = function() { return arguments; };

const someArgs = returnArguments('a');

const sameArgs = returnArguments('a');

const diffArgs = returnArguments('b');

assertNotDeepOrStrict(someArgs, ['a']);

assertNotDeepOrStrict(someArgs, { '0': 'a' });

assertNotDeepOrStrict(someArgs, diffArgs);

assertDeepAndStrictEqual(someArgs, sameArgs);

});

test('Handle sparse arrays', () => {

/* eslint-disable no-sparse-arrays */

assertDeepAndStrictEqual([1, , , 3], [1, , , 3]);

assertNotDeepOrStrict([1, , , 3], [1, , , 3, , , ]);

assertNotDeepOrStrict([1, , , 3], [1, undefined, , 3]);

/* eslint-enable no-sparse-arrays */

const a = new Array(3);

const b = new Array(3);

a[2] = true;

b[1] = true;

assertNotDeepOrStrict(a, b, AssertionError, { partial: 'pass' });

b[2] = true;

assertNotDeepOrStrict(a, b);

a[0] = true;

assertNotDeepOrStrict(a, b, AssertionError, { partial: 'pass' });

});

test('Handle sets and maps with mixed keys', () => {

// https://github.com/nodejs/node/issues/61386

const aSet = new Set([0, new Set([1, 2, 3]), new Set([4, 5, 6])]);

const bSet = new Set([

0,

new Set([1, new Set([2, 3]), new Set([20, 30])]),

new Set([4, new Set([5, 6]), new Set([50, 60])]),

]);

assertNotDeepOrStrict(aSet, bSet);

const aMap = new Map([[0, 'zero'], [1, 'one'], [new Set([1, 2, 3]), 'A']]);

const bMap = new Map([[0, 'zero'], [new Set([1, 2, 3]), 'A'], [new Set([9]), 'B']]);

assertNotDeepOrStrict(aMap, bMap);

});

test('Handle different error messages', () => {

const err1 = new Error('foo1');

assertNotDeepOrStrict(err1, new Error('foo2'), assert.AssertionError);

assertNotDeepOrStrict(err1, new TypeError('foo1'), assert.AssertionError);

assertDeepAndStrictEqual(err1, new Error('foo1'));

assertNotDeepOrStrict(err1, {}, AssertionError);

});

test('Handle NaN', () => {

assertDeepAndStrictEqual(NaN, NaN);

assertDeepAndStrictEqual({ a: NaN }, { a: NaN });

assertDeepAndStrictEqual([ 1, 2, NaN, 4 ], [ 1, 2, NaN, 4 ]);

});

test('Handle boxed primitives', () => {

const boxedString = new String('test');

const boxedSymbol = Object(Symbol());

const fakeBoxedSymbol = {};

Object.setPrototypeOf(fakeBoxedSymbol, Symbol.prototype);

Object.defineProperty(

fakeBoxedSymbol,

Symbol.toStringTag,

{ enumerable: false, value: 'Symbol' }

);

assertNotDeepOrStrict(new Boolean(true), Object(false));

assertNotDeepOrStrict(Object(true), new Number(1));

assertNotDeepOrStrict(new Number(2), new Number(1));

assertNotDeepOrStrict(boxedSymbol, Object(Symbol()));

assertNotDeepOrStrict(boxedSymbol, {});

assertNotDeepOrStrict(boxedSymbol, fakeBoxedSymbol);

assertDeepAndStrictEqual(boxedSymbol, boxedSymbol);

assertDeepAndStrictEqual(Object(true), Object(true));

assertDeepAndStrictEqual(Object(2), Object(2));

assertDeepAndStrictEqual(boxedString, Object('test'));

boxedString.slow = true;

assertNotDeepOrStrict(boxedString, Object('test'));

boxedSymbol.slow = true;

assertNotDeepOrStrict(boxedSymbol, {});

assertNotDeepOrStrict(boxedSymbol, fakeBoxedSymbol);

});

test('Minus zero', () => {

assertOnlyDeepEqual(0, -0);

assertDeepAndStrictEqual(-0, -0);

});

test('Handle symbols (enumerable only)', () => {

const symbol1 = Symbol();

const obj1 = { [symbol1]: 1 };

const obj2 = { [symbol1]: 1 };

const obj3 = { [Symbol()]: 1 };

// Add a non enumerable symbol as well. It is going to be ignored!

Object.defineProperty(obj2, Symbol(), { value: 1 });

assertOnlyDeepEqual(obj1, obj3);

assertDeepAndStrictEqual(obj1, obj2);

obj2[Symbol()] = true;

assertOnlyDeepEqual(obj1, obj2);

// TypedArrays have a fast path. Test for this as well.

const a = new Uint8Array(4);

const b = new Uint8Array(4);

a[symbol1] = true;

b[symbol1] = false;

assertOnlyDeepEqual(a, b);

b[symbol1] = true;

assertDeepAndStrictEqual(a, b);

// The same as TypedArrays is valid for boxed primitives

const boxedStringA = new String('test');

const boxedStringB = new String('test');

boxedStringA[symbol1] = true;

assertOnlyDeepEqual(boxedStringA, boxedStringB);

boxedStringA[symbol1] = true;

assertDeepAndStrictEqual(a, b);

// Loose equal arrays should not compare symbols.

const arr = [1];

const arr2 = [1];

arr[symbol1] = true;

assertOnlyDeepEqual(arr, arr2);

arr2[symbol1] = false;

assertOnlyDeepEqual(arr, arr2);

});

test('Additional tests', () => {

assert.throws(

() => assert.notDeepEqual(1, true),

{

message: /1\n\nshould not loosely deep-equal\n\ntrue/

}

);

assert.throws(

() => assert.notDeepEqual(1, 1),

{

message: /Expected "actual" not to be loosely deep-equal to:\n\n1/

}

);

assertDeepAndStrictEqual(new Date(2000, 3, 14), new Date(2000, 3, 14));

assert.throws(() => { assert.deepEqual(new Date(), new Date(2000, 3, 14)); },

AssertionError,

'deepEqual(new Date(), new Date(2000, 3, 14))');

assert.throws(

() => { assert.notDeepEqual(new Date(2000, 3, 14), new Date(2000, 3, 14)); },

AssertionError,

'notDeepEqual(new Date(2000, 3, 14), new Date(2000, 3, 14))'

);

assert.throws(

() => { assert.notDeepEqual('a'.repeat(1024), 'a'.repeat(1024)); },

AssertionError,

'notDeepEqual("a".repeat(1024), "a".repeat(1024))'

);

assertNotDeepOrStrict(new Date(), new Date(2000, 3, 14));

{

// Invalid dates deep comparison.

const date1 = new Date('foo');

const date2 = new Date('bar');

date1.foo = true;

date2.foo = true;

assertDeepAndStrictEqual(date1, date2);

date1.bar = false;

date2.bar = true;

assertNotDeepOrStrict(date1, date2);

}

assertDeepAndStrictEqual(/a/, /a/);

assertDeepAndStrictEqual(/a/g, /a/g);

assertDeepAndStrictEqual(/a/i, /a/i);

assertDeepAndStrictEqual(/a/m, /a/m);

assertDeepAndStrictEqual(/a/igm, /a/igm);

assertNotDeepOrStrict(/ab/, /a/);

assertNotDeepOrStrict(/a/g, /a/);

assertNotDeepOrStrict(/a/i, /a/);

assertNotDeepOrStrict(/a/m, /a/);

assertNotDeepOrStrict(/a/igm, /a/im);

{

const re1 = /a/g;

re1.lastIndex = 3;

assert.notDeepEqual(re1, /a/g);

}

assert.deepEqual(4, '4');

assert.deepEqual(true, 1);

assert.throws(() => assert.deepEqual(4, '5'),

AssertionError,

'deepEqual( 4, \'5\')');

});

test('Having the same number of owned properties && the same set of keys', () => {

assert.deepEqual({ a: 4 }, { a: 4 });

assert.deepEqual({ a: 4, b: '2' }, { a: 4, b: '2' });

assert.deepEqual([4], ['4']);

assert.throws(

() => assert.deepEqual({ a: 4 }, { a: 4, b: true }), AssertionError);

assert.notDeepEqual(['a'], { 0: 'a' });

assert.deepEqual({ a: 4, b: '1' }, { b: '1', a: 4 });

const a1 = [1, 2, 3];

const a2 = [1, 2, 3];

a1.a = 'test';

a1.b = true;

a2.b = true;

a2.a = 'test';

assert.throws(() => assert.deepEqual(Object.keys(a1), Object.keys(a2)),

AssertionError);

assertDeepAndStrictEqual(a1, a2);

});

test('Having an identical prototype property', () => {

const nbRoot = {

toString() { return `${this.first} ${this.last}`; }

};

function nameBuilder(first, last) {

this.first = first;

this.last = last;

return this;

}

nameBuilder.prototype = nbRoot;

function nameBuilder2(first, last) {

this.first = first;

this.last = last;

return this;

}

nameBuilder2.prototype = nbRoot;

const nb1 = new nameBuilder('Ryan', 'Dahl');

let nb2 = new nameBuilder2('Ryan', 'Dahl');

assert.deepEqual(nb1, nb2);

nameBuilder2.prototype = Object;

nb2 = new nameBuilder2('Ryan', 'Dahl');

assert.deepEqual(nb1, nb2);

});

test('Primitives', () => {

assertNotDeepOrStrict(null, {});

assertNotDeepOrStrict(undefined, {});

assertNotDeepOrStrict('a', ['a']);

assertNotDeepOrStrict('a', { 0: 'a' });

assertNotDeepOrStrict(1, {});

assertNotDeepOrStrict(true, {});

assertNotDeepOrStrict(Symbol(), {});

assertNotDeepOrStrict(Symbol(), Symbol());

assertOnlyDeepEqual(4, '4');

assertOnlyDeepEqual(true, 1);

{

const s = Symbol();

assertDeepAndStrictEqual(s, s);

}

// Primitive wrappers and object.

assertNotDeepOrStrict(new String('a'), ['a']);

assertNotDeepOrStrict(new String('a'), { 0: 'a' });

assertNotDeepOrStrict(new Number(1), {});

assertNotDeepOrStrict(new Boolean(true), {});

});

test('Additional tests', () => {

// Same number of keys but different key names.

assertNotDeepOrStrict({ a: 1 }, { b: 1 });

assert.deepStrictEqual(new Date(2000, 3, 14), new Date(2000, 3, 14));

assert.throws(

() => assert.deepStrictEqual(new Date(), new Date(2000, 3, 14)),

AssertionError,

'deepStrictEqual(new Date(), new Date(2000, 3, 14))'

);

assert.throws(

() => assert.notDeepStrictEqual(new Date(2000, 3, 14), new Date(2000, 3, 14)),

{

name: 'AssertionError',

message: 'Expected "actual" not to be strictly deep-equal to:\n\n' +

util.inspect(new Date(2000, 3, 14))

}

);

assert.throws(

() => assert.strictEqual('apple', 'pear'),

{

name: 'AssertionError',

message: 'Expected values to be strictly equal:\n\n\'apple\' !== \'pear\'\n'

}

);

assert.throws(

() => assert.strictEqual('ABABABABABAB', 'BABABABABABA'),

{

name: 'AssertionError',

message: 'Expected values to be strictly equal:\n' +

'+ actual - expected\n' +

'\n' +

"+ 'ABABABABABAB'\n" +

"- 'BABABABABABA'\n"

}

);

assert.notDeepStrictEqual(new Date(), new Date(2000, 3, 14));

assert.throws(

() => assert.deepStrictEqual(/ab/, /a/),

{

code: 'ERR_ASSERTION',

name: 'AssertionError',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ /ab/\n' +

'- /a/\n'

});

assert.throws(

() => assert.deepStrictEqual(/a/g, /a/),

{

code: 'ERR_ASSERTION',

name: 'AssertionError',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ /a/g\n' +

'- /a/\n'

});

assert.throws(

() => assert.deepStrictEqual(/a/i, /a/),

{

code: 'ERR_ASSERTION',

name: 'AssertionError',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ /a/i\n' +

'- /a/\n'

});

assert.throws(

() => assert.deepStrictEqual(/a/m, /a/),

{

code: 'ERR_ASSERTION',

name: 'AssertionError',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ /a/m\n' +

'- /a/\n'

});

assert.throws(

() => assert.deepStrictEqual(/aa/igm, /aa/im),

{

code: 'ERR_ASSERTION',

name: 'AssertionError',

message: 'Expected values to be strictly deep-equal:\n' +

'+ actual - expected\n' +

'\n' +

'+ /aa/gim\n' +

'- /aa/im\n'

});

{

const re1 = /a/;

re1.lastIndex = 3;

assert.notDeepStrictEqual(re1, /a/);

}

assert.throws(

// eslint-disable-next-line no-restricted-syntax

() => assert.deepStrictEqual(4, '4'),

{ message: `${defaultMsgStart}\n4 !== '4'\n` }