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util: inspect all prototypes #24974

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It is currently difficult to distinguish multiple objects from each
other because the prototype is not properly inspected. From now on
all prototypes will be inspected, even if we do not fully know how
they will look like / what there shape really is.

Fixes: #24917

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • documentation is changed or added
  • commit message follows commit guidelines

@nodejs-github-bot nodejs-github-bot added the util Issues and PRs related to the built-in util module. label Dec 11, 2018
It is currently difficult to distinguish multiple objects from each
other because the prototype is not properly inspected. From now on
all prototypes will be inspected, even if we do not fully know how
they will look like / what their shape really is.

Fixes: nodejs#24917
@lpinca
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lpinca commented Dec 12, 2018

Does the test case in #24917 now produces an error message that starts with

Expected values to be strictly deep-equal:

for both variants?

@BridgeAR
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@lpinca correct. assert uses util.inspect() to inspect the input values and then transforms that into the actual output.

With this solution prototypes will almost always be properly distinguishable. There are a few edge cases left where that's not the case but they should be negligible. It's just hard to guarantee that different inputs will actually also produce a different output.

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BridgeAR commented Dec 12, 2018

@BridgeAR BridgeAR added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Dec 12, 2018
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LGTM

@Trott
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Trott commented Dec 14, 2018

Resume Build CI: https://ci.nodejs.org/job/node-test-commit/24292/ ✔️

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@nodejs/util PTAL. I would like to get another review for this one.

BridgeAR added a commit to BridgeAR/node that referenced this pull request Dec 16, 2018
It is currently difficult to distinguish multiple objects from each
other because the prototype is not properly inspected. From now on
all prototypes will be inspected, even if we do not fully know how
they will look like / what their shape really is.

PR-URL: nodejs#24974
Fixes: nodejs#24917
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@BridgeAR
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Landed in 02b66b5

@BridgeAR BridgeAR closed this Dec 16, 2018
BethGriggs pushed a commit that referenced this pull request Dec 18, 2018
It is currently difficult to distinguish multiple objects from each
other because the prototype is not properly inspected. From now on
all prototypes will be inspected, even if we do not fully know how
they will look like / what their shape really is.

PR-URL: #24974
Fixes: #24917
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@BethGriggs BethGriggs mentioned this pull request Dec 18, 2018
refack pushed a commit to refack/node that referenced this pull request Jan 14, 2019
It is currently difficult to distinguish multiple objects from each
other because the prototype is not properly inspected. From now on
all prototypes will be inspected, even if we do not fully know how
they will look like / what their shape really is.

PR-URL: nodejs#24974
Fixes: nodejs#24917
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@BridgeAR BridgeAR deleted the inspect-weird-prototypes branch January 20, 2020 11:44
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