Enablie a lint rule to require `===` and `!==` instead of `==` and `!=`
except in some well-defined cases:
* comparing against `null` as a shorthand for also checking for
`undefined`
* comparing the result of `typeof`
* comparing literal values
In cases where `==` or `!=` are being used as optimizations, use an
ESLint comment to disable the `eqeqeq` rule for that line explicitly. I
rather like this because it's a signal that the usage is intentional and
not a mistake.
PR-URL: https://github.com/nodejs/node/pull/12446
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
assert.fail() has two possible function signatures, both of which are
not intuitive. It virtually guarantees that people who try to use
assert.fail() without carefully reading the docs will end up using it
incorrectly.
This change maintains backwards compatibility with the two valid uses
(arguments 1 2 and 4 supplied but argument 3 falsy, and argument 3
supplied but arguments 1 2 and 4 all falsy) but also adds the far more
intuitive first-argument-only and first-two-arguments-only
possibilities.
assert.fail('boom');
// AssertionError: boom
assert.fail('a', 'b');
// AssertionError: 'a' != 'b'
PR-URL: https://github.com/nodejs/node/pull/12293
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
assert.deepEqual and assert.deepStrictEqual currently return true for
any pair of Maps and Sets regardless of content. This patch adds
support in deepEqual and deepStrictEqual to verify the contents of Maps
and Sets.
Deeo equivalence checking is currently an
O(n^2) operation, and worse, it gets slower exponentially if maps
and sets were nested.
Note that this change breaks compatibility with previous versions of
deepEqual and deepStrictEqual if consumers were depending on all maps
and sets to be seen as equivalent. The old behaviour was never
documented, but nevertheless there are certainly some tests out there
which depend on it.
Support has stalled because the assert API was frozen, but was recently
unfrozen in CTC#63.
---
Later squashed in:
This change updates the checks for deep equality checking on Map and Set
to check all set values / all map keys to see if any of them match the
expected result.
This change is much slower, but based on the conversation in the pull
request its probably the right approach.
Fixes: https://github.com/nodejs/node/issues/2309
Refs: https://github.com/substack/tape/issues/342
Refs: https://github.com/nodejs/node/pull/2315
Refs: https://github.com/nodejs/CTC/issues/63
PR-URL: https://github.com/nodejs/node/pull/12142
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Refactors _deepEqual and fixes a few code paths that lead to
behaviors contradicting what the doc says. Before this commit
certain types of objects (Buffers, Dates, etc.) are not checked
properly, and can get away with different prototypes AND different
enumerable owned properties because _deepEqual would jump to
premature conclusion for them.
Since we no longer follow CommonJS unit testing spec,
the checks for primitives and object prototypes are moved
forward for faster failure.
Improve regexp and float* array checks:
* Don't compare lastIndex of regexps, because they are not
enumerable, so according to the docs they should not be compared
* Compare flags of regexps instead of separate properties
* Use built-in tags to test for float* arrays instead of using
instanceof
Use full link to the archived GitHub repository.
Use util.objectToString for future improvements to that function
that makes sure the call won't be tampered with.
PR-URL: https://github.com/nodejs/node/pull/11128
Refs: https://github.com/nodejs/node/pull/10282#issuecomment-274267895
Refs: https://github.com/nodejs/node/issues/10258#issuecomment-266963234
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
The internal function `truncate()` is only called with the first
argument being the output of `util.inspect()`. `util.inspect()` calls
its own internal `formatValue()` which is guaranteed to return a string.
Therefore, we can remove the check in `truncate()` that the first
argument is a string as well as code to handle the case where it is not
a string.
PR-URL: https://github.com/nodejs/node/pull/8132
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Alexander Makarenko <estliberitas@gmail.com>
Reviewed-By: Yorkie Liu <yorkiefixer@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Remove special handling when asserting on a pair of arguments objects.
The code being removed will only run if both `expected` and `actual` are
arguments objects. Given that situation, the subsequent code for
handling everything else works just fine.
Tests added to confirm expected behavior.
This came about while trying to improve test coverage. The segment of
code removed had no test coverage. I was unable to write a test that
would both exercise the code and fail if the code was removed. Further
examination indicated that this was because the special handling was not
needed.
PR-URL: https://github.com/nodejs/node/pull/7413
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Do not convert typed arrays to `Buffer` for deepEqual since
their values may not be accurately represented by 8-bit ints.
Instead perform binary comparison of underlying `ArrayBuffer`s,
but only when the array types match.
Never apply any kind of optimization for floating-point typed
arrays since bit pattern equality is not the right kind of check
for them.
PR-URL: https://github.com/nodejs/node/pull/5910
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Fixes: https://github.com/nodejs/node/issues/5907
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Instead of leaking the arguments object by passing it as an
argument to a function, copy it's contents to a new array,
then pass the array. This allows V8 to optimize the function
that contains this code, improving performance.
PR-URL: https://github.com/nodejs/node/pull/4361
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
With an indentation style of two spaces, it is not possible to indent
multiline variable declarations by four spaces. Instead, the var keyword
is used on every new line.
Use const instead of var where applicable for changed lines.
PR-URL: https://github.com/nodejs/io.js/pull/2286
Reviewed-By: Roman Reiss <me@silverwind.io>
`x instanceof f` where f is an arrow function throws a (spec-conforming)
"Function has non-object prototype 'undefined' in instanceof check"
exception.
Add a workaround so that it's possible to pass arrow functions as the
second argument to assert.throws(). The try/catch block is a little
jarring but swapping around the clauses in the if statements changes
the semantics too much.
Fixes: https://github.com/nodejs/node/issues/3275
PR-URL: https://github.com/nodejs/node/pull/3276
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Many of the util.is*() methods used to check data types
simply compare against a single value or the result of
typeof. This commit replaces calls to these methods with
equivalent checks. This commit does not touch calls to the
more complex methods (isRegExp(), isDate(), etc.).
Fixes: https://github.com/iojs/io.js/issues/607
PR-URL: https://github.com/iojs/io.js/pull/647
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Currently, JSON.stringify() is used to create error messages
on failed assertions. This causes an error when stringifying
objects with circular references. This commit switches out
JSON.stringify() for util.inspect(), which can handle
circular references.
PR-URL: https://github.com/iojs/io.js/pull/668
Reviewed-By: Julien Gilli <julien.gilli@joyent.com>
Reviewed-By: Bert Belder <bertbelder@gmail.com>
Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com>
Switch condition order to check for null before calling isNaN().
Also remove two unnecessary calls to isNaN() that are already
covered by calls to isFinite(). This commit targets v0.10, as
opposed to #7891, which targets master (suggested by
@bnoordhuis). Closes#7840.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Ensure that the behavior of `assert.deepEqual` does not depend on
argument ordering when comparing an `arguments` object with a
non-`arguments` object.
4716dc6 made assert.equal() and related functions work better by
generating a better toString() from the expected, actual, and operator
values passed to fail(). Unfortunately, this was accomplished by putting
the generated message into the error's `name` property. When you passed
in a custom error message, the error would put the custom error into
`name` *and* `message`, resulting in helpful string representations like
"AssertionError: Oh no: Oh no".
This commit resolves that issue by storing the generated message in the
`message` property while leaving the error's name alone and adding
a regression test so that this doesn't pop back up later.
Closes#5292.
It takes an optional "expected exception" argument that is not used meaningfully
but is nevertheless documented. Undocument it, it confuses casual readers of the
documentation.
Fixes#3935.
Rich Trott