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'use strict';
require('../common');
const assert = require('assert');
// eslint-disable-next-line node-core/must-call-assert
const { Assert } = require('assert');
const { inspect } = require('util');
const { test } = require('node:test');
// 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';
}
test('Assert constructor requires new', () => {
assert.throws(() => Assert(), {
code: 'ERR_CONSTRUCT_CALL_REQUIRED',
name: 'TypeError',
});
});
test('Assert class non strict', () => {
const assertInstance = new Assert({ diff: undefined, strict: false });
assertInstance.ok(
assert.AssertionError.prototype instanceof Error,
'assert.AssertionError instanceof Error'
);
assert.strictEqual(typeof assertInstance.ok, 'function');
assert.strictEqual(assertInstance.ok.strictEqual, undefined);
assert.strictEqual(typeof assertInstance.strictEqual, 'function');
assertInstance.ok(true);
assertInstance.throws(
() => {
assertInstance.fail();
},
{
code: 'ERR_ASSERTION',
name: 'AssertionError',
message: 'Failed',
operator: 'fail',
actual: undefined,
expected: undefined,
generatedMessage: true,
stack: /Failed/,
}
);
assertInstance.equal(undefined, undefined);
assertInstance.equal(null, undefined);
assertInstance.equal(2, '2');
assertInstance.notEqual(true, false);
assertInstance.throws(() => assertInstance.deepEqual(/a/), {
code: 'ERR_MISSING_ARGS',
});
assertInstance.throws(() => assertInstance.notDeepEqual('test'), {
code: 'ERR_MISSING_ARGS',
});
assertInstance.notStrictEqual(2, '2');
assertInstance.throws(
() => assertInstance.strictEqual(2, '2'),
assertInstance.AssertionError,
"strictEqual(2, '2')"
);
assertInstance.throws(
() => {
assertInstance.partialDeepStrictEqual(
{ a: true },
{ a: false },
'custom message'
);
},
{
code: 'ERR_ASSERTION',
name: 'AssertionError',
message:
'custom message\n+ actual - expected\n\n {\n+ a: true\n- a: false\n }\n',
}
);
assertInstance.throws(() => assertInstance.match(/abc/, 'string'), {
code: 'ERR_INVALID_ARG_TYPE',
message:
'The "regexp" argument must be an instance of RegExp. ' +
"Received type string ('string')",
});
assertInstance.throws(() => assertInstance.doesNotMatch(/abc/, 'string'), {
code: 'ERR_INVALID_ARG_TYPE',
message:
'The "regexp" argument must be an instance of RegExp. ' +
"Received type string ('string')",
});
/* eslint-disable no-restricted-syntax */
{
function thrower(errorConstructor) {
throw new errorConstructor({});
}
let threw = false;
try {
assertInstance.doesNotThrow(
() => thrower(TypeError),
assertInstance.AssertionError
);
} catch (e) {
threw = true;
assertInstance.ok(e instanceof TypeError);
}
assertInstance.ok(
threw,
'assertInstance.doesNotThrow with an explicit error is eating extra errors'
);
}
{
let threw = false;
const rangeError = new RangeError('my range');
try {
assertInstance.doesNotThrow(
() => {
throw new TypeError('wrong type');
},
TypeError,
rangeError
);
} catch (e) {
threw = true;
assertInstance.ok(e.message.includes(rangeError.message));
assertInstance.ok(e instanceof assertInstance.AssertionError);
assertInstance.ok(!e.stack.includes('doesNotThrow'), e);
}
assertInstance.ok(threw);
}
/* eslint-enable no-restricted-syntax */
});
test('Assert class strict', () => {
const assertInstance = new Assert();
assertInstance.equal(assertInstance.equal, assertInstance.strictEqual);
assertInstance.equal(
assertInstance.deepEqual,
assertInstance.deepStrictEqual
);
assertInstance.equal(assertInstance.notEqual, assertInstance.notStrictEqual);
assertInstance.equal(
assertInstance.notDeepEqual,
assertInstance.notDeepStrictEqual
);
});
test('Assert class with invalid diff option', () => {
assert.throws(() => new Assert({ diff: 'invalid' }), {
code: 'ERR_INVALID_ARG_VALUE',
name: 'TypeError',
message: "The property 'options.diff' must be one of: 'simple', 'full'. Received 'invalid'",
});
});
const longLinesOfAs = 'A\n'.repeat(100);
const longLinesOFBs = 'B\n'.repeat(100);
const truncatedAs = 'A\\n'.repeat(10) + '...';
const truncatedBs = 'B\\n'.repeat(10) + '...';
const longStringOfAs = 'A'.repeat(10_000);
const longStringOfBs = 'B'.repeat(10_000);
const longLinesOfAsWithEllipsis = longStringOfAs.substring(0, 9_488) + '...';
const longLinesOFBsWithEllipsis = longStringOfBs.substring(0, 9_488) + '...';
test('Assert class non strict with full diff', () => {
const assertInstance = new Assert({ diff: 'full', strict: false });
// long strings
{
assertInstance.throws(
() => {
assertInstance.strictEqual(longStringOfAs, longStringOfBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'strictEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfBs);
assertInstance.strictEqual(
err.message,
`Expected values to be strictly equal:\n+ actual - expected\n\n` +
`+ '${longStringOfAs}'\n- '${longStringOfBs}'\n`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOFBsWithEllipsis}'`)
);
return true;
}
);
assertInstance.throws(
() => {
assertInstance.notStrictEqual(longStringOfAs, longStringOfAs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'notStrictEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfAs);
assertInstance.strictEqual(
err.message,
`Expected "actual" to be strictly unequal to:\n\n` +
`'${longStringOfAs}'`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOfAsWithEllipsis}'`)
);
return true;
}
);
assertInstance.throws(
() => {
assertInstance.deepEqual(longStringOfAs, longStringOfBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'deepEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfBs);
assertInstance.strictEqual(
err.message,
`Expected values to be loosely deep-equal:\n\n` +
`'${longStringOfAs}'\n\nshould loosely deep-equal\n\n'${longStringOfBs}'`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOFBsWithEllipsis}'`)
);
return true;
}
);
}
// long lines
{
assertInstance.throws(
() => {
assertInstance.strictEqual(longLinesOfAs, longLinesOFBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'strictEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOFBs);
assertInstance.strictEqual(err.message.split('\n').length, 204);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes('Expected values to be strictly equal')
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedBs}`));
return true;
}
);
assertInstance.throws(
() => {
assertInstance.notStrictEqual(longLinesOfAs, longLinesOfAs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'notStrictEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOfAs);
assertInstance.strictEqual(err.message.split('\n').length, 103);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes(`Expected "actual" to be strictly unequal to:`)
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedAs}`));
return true;
}
);
assertInstance.throws(
() => {
assertInstance.deepEqual(longLinesOfAs, longLinesOFBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'deepEqual');
assertInstance.strictEqual(err.diff, 'full');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOFBs);
assertInstance.strictEqual(err.message.split('\n').length, 205);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes(`Expected values to be loosely deep-equal:`)
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedBs}`));
return true;
}
);
}
});
test('Assert class non strict with simple diff', () => {
const assertInstance = new Assert({ diff: 'simple', strict: false });
// long strings
{
assertInstance.throws(
() => {
assertInstance.strictEqual(longStringOfAs, longStringOfBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'strictEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfBs);
assertInstance.strictEqual(
err.message,
`Expected values to be strictly equal:\n+ actual - expected\n\n` +
`+ '${longStringOfAs}'\n- '${longStringOfBs}'\n`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOFBsWithEllipsis}'`)
);
return true;
}
);
assertInstance.throws(
() => {
assertInstance.notStrictEqual(longStringOfAs, longStringOfAs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'notStrictEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfAs);
assertInstance.strictEqual(
err.message,
`Expected "actual" to be strictly unequal to:\n\n` +
`'${longStringOfAs}'`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOfAsWithEllipsis}'`)
);
return true;
}
);
assertInstance.throws(
() => {
assertInstance.deepEqual(longStringOfAs, longStringOfBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'deepEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longStringOfAs);
assertInstance.strictEqual(err.expected, longStringOfBs);
assertInstance.strictEqual(
err.message,
`Expected values to be loosely deep-equal:\n\n` +
`'${
longStringOfAs.substring(0, 508) + '...'
}\n\nshould loosely deep-equal\n\n'${
longStringOfBs.substring(0, 508) + '...'
}`
);
assertInstance.ok(
inspect(err).includes(`actual: '${longLinesOfAsWithEllipsis}'`)
);
assertInstance.ok(
inspect(err).includes(`expected: '${longLinesOFBsWithEllipsis}'`)
);
return true;
}
);
}
// long lines
{
assertInstance.throws(
() => {
assertInstance.strictEqual(longLinesOfAs, longLinesOFBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'strictEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOFBs);
assertInstance.strictEqual(err.message.split('\n').length, 204);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes('Expected values to be strictly equal')
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedBs}`));
return true;
}
);
assertInstance.throws(
() => {
assertInstance.notStrictEqual(longLinesOfAs, longLinesOfAs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'notStrictEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOfAs);
assertInstance.strictEqual(err.message.split('\n').length, 50);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes(`Expected "actual" to be strictly unequal to:`)
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedAs}`));
return true;
}
);
assertInstance.throws(
() => {
assertInstance.deepEqual(longLinesOfAs, longLinesOFBs);
},
(err) => {
assertInstance.strictEqual(err.code, 'ERR_ASSERTION');
assertInstance.strictEqual(err.operator, 'deepEqual');
assertInstance.strictEqual(err.diff, 'simple');
assertInstance.strictEqual(err.actual, longLinesOfAs);
assertInstance.strictEqual(err.expected, longLinesOFBs);
assertInstance.strictEqual(err.message.split('\n').length, 109);
assertInstance.strictEqual(err.actual.split('\n').length, 101);
assertInstance.ok(
err.message.includes(`Expected values to be loosely deep-equal:`)
);
assertInstance.ok(inspect(err).includes(`actual: '${truncatedAs}`));
assertInstance.ok(inspect(err).includes(`expected: '${truncatedBs}`));
return true;
}
);
}
});
// Shared setup for skipPrototype tests
{
const message = 'Expected values to be strictly deep-equal:\n' +
'+ actual - expected\n' +
'\n' +
' [\n' +
' 1,\n' +
' 2,\n' +
' 3,\n' +
' 4,\n' +
' 5,\n' +
'+ 6,\n' +
'- 9,\n' +
' 7\n' +
' ]\n';
function CoolClass(name) { this.name = name; }
function AwesomeClass(name) { this.name = name; }
class Modern { constructor(value) { this.value = value; } }
class Legacy { constructor(value) { this.value = value; } }
const cool = new CoolClass('Assert is inspiring');
const awesome = new AwesomeClass('Assert is inspiring');
const modern = new Modern(42);
const legacy = new Legacy(42);
test('Assert class strict with skipPrototype', () => {
const assertInstance = new Assert({ skipPrototype: true });
assert.throws(
() => assertInstance.deepEqual([1, 2, 3, 4, 5, 6, 7], [1, 2, 3, 4, 5, 9, 7]),
{ message }
);
assertInstance.deepEqual(cool, awesome);
assertInstance.deepStrictEqual(cool, awesome);
assertInstance.deepEqual(modern, legacy);
assertInstance.deepStrictEqual(modern, legacy);
const cool2 = new CoolClass('Soooo coooool');
assert.throws(
() => assertInstance.deepStrictEqual(cool, cool2),
{ code: 'ERR_ASSERTION' }
);
const nested1 = { obj: new CoolClass('test'), arr: [1, 2, 3] };
const nested2 = { obj: new AwesomeClass('test'), arr: [1, 2, 3] };
assertInstance.deepStrictEqual(nested1, nested2);
const arr = new Uint8Array([1, 2, 3]);
const buf = Buffer.from([1, 2, 3]);
assertInstance.deepStrictEqual(arr, buf);
});
test('Assert class non strict with skipPrototype', () => {
const assertInstance = new Assert({ strict: false, skipPrototype: true });
assert.throws(
() => assertInstance.deepStrictEqual([1, 2, 3, 4, 5, 6, 7], [1, 2, 3, 4, 5, 9, 7]),
{ message }
);
assertInstance.deepStrictEqual(cool, awesome);
assertInstance.deepStrictEqual(modern, legacy);
});
test('Assert class skipPrototype with complex objects', () => {
const assertInstance = new Assert({ skipPrototype: true });
function ComplexAwesomeClass(name, age) {
this.name = name;
this.age = age;
this.settings = {
theme: 'dark',
lang: 'en'
};
}
function ComplexCoolClass(name, age) {
this.name = name;
this.age = age;
this.settings = {
theme: 'dark',
lang: 'en'
};
}
const awesome1 = new ComplexAwesomeClass('Foo', 30);
const cool1 = new ComplexCoolClass('Foo', 30);
assertInstance.deepStrictEqual(awesome1, cool1);
const cool2 = new ComplexCoolClass('Foo', 30);
cool2.settings.theme = 'light';
assert.throws(
() => assertInstance.deepStrictEqual(awesome1, cool2),
{ code: 'ERR_ASSERTION' }
);
});
test('Assert class skipPrototype with arrays and special objects', () => {
const assertInstance = new Assert({ skipPrototype: true });
const arr1 = [1, 2, 3];
const arr2 = new Array(1, 2, 3);
assertInstance.deepStrictEqual(arr1, arr2);
const date1 = new Date('2023-01-01');
const date2 = new Date('2023-01-01');
assertInstance.deepStrictEqual(date1, date2);
const regex1 = /test/g;
const regex2 = new RegExp('test', 'g');
assertInstance.deepStrictEqual(regex1, regex2);
const date3 = new Date('2023-01-02');
assert.throws(
() => assertInstance.deepStrictEqual(date1, date3),
{ code: 'ERR_ASSERTION' }
);
});
test('Assert class skipPrototype with notDeepStrictEqual', () => {
const assertInstance = new Assert({ skipPrototype: true });
assert.throws(
() => assertInstance.notDeepStrictEqual(cool, awesome),
{ code: 'ERR_ASSERTION' }
);
const notAwesome = new AwesomeClass('Not so awesome');
assertInstance.notDeepStrictEqual(cool, notAwesome);
const defaultAssertInstance = new Assert({ skipPrototype: false });
defaultAssertInstance.notDeepStrictEqual(cool, awesome);
});
test('Assert class skipPrototype with mixed types', () => {
const assertInstance = new Assert({ skipPrototype: true });
const obj1 = { value: 42, nested: { prop: 'test' } };
function CustomObj(value, nested) {
this.value = value;
this.nested = nested;
}
const obj2 = new CustomObj(42, { prop: 'test' });
assertInstance.deepStrictEqual(obj1, obj2);
assert.throws(
() => assertInstance.deepStrictEqual({ num: 42 }, { num: '42' }),
{ code: 'ERR_ASSERTION' }
);
});
}