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test: avoid deep comparisons with literals #40634

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test: avoid deep comparisons with literals #40634

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As far as I know, comparing any value to any non-RegExp literal or undefined using strictEqual (or notStrictEqual) passes if and only if deepStrictEqual (or notDeepStrictEqual, respectively) passes.

Personally, I think that unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual and notDeepStrictEqual when the expected value (i.e., the second argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

extend interface Literal <: Expression {
    type: "Literal";
    value: string | boolean | null | number | RegExp | bigint;
}

The value undefined is an Identifier with name: 'undefined'.

@tniessen tniessen requested a review from Trott October 27, 2021 17:36
@nodejs-github-bot nodejs-github-bot added esm Issues and PRs related to the ECMAScript Modules implementation. needs-ci PRs that need a full CI run. test Issues and PRs related to the tests. labels Oct 27, 2021
@tniessen tniessen added the assert Issues and PRs related to the assert subsystem. label Oct 27, 2021
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Trott approved these changes Oct 27, 2021
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Rubber-stamp LGTM if CI is green

@tniessen tniessen added the request-ci Add this label to start a Jenkins CI on a PR. label Oct 27, 2021
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test: avoid deep comparisons with literals
17d8a5d 
Comparing any value to any non-RegExp literal or undefined using
strictEqual (or notStrictEqual) passes if and only if deepStrictEqual
(or notDeepStrictEqual, respectively) passes.

Unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual
and notDeepStrictEqual when the expected value (i.e., the second
argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

    extend interface Literal <: Expression {
        type: "Literal";
        value: string | boolean | null | number | RegExp | bigint;
    }

The value `undefined` is an `Identifier` with `name: 'undefined'`.
@tniessen tniessen force-pushed the test-prefer-strictequal-notstrictequal branch from f12539b to 17d8a5d Compare October 28, 2021 15:33
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(Force-push changes commit message only.)

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tniessen commented Nov 1, 2021

Rubber-stamp LGTM if CI is green

I didn't expect that part to be this difficult 😄 Maybe the 12th CI run on the same commit will finally pass all tests.

(It seems that "yellow" jobs are also re-run upon pressing "resume", so the number of failures can actually increase.)

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CI: https://ci.nodejs.org/job/node-test-pull-request/40647/

@tniessen tniessen added the commit-queue Add this label to land a pull request using GitHub Actions. label Nov 2, 2021
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github-actions bot commented Nov 2, 2021

Landed in 229a182...dd52c05

@github-actions github-actions bot closed this Nov 2, 2021
nodejs-github-bot pushed a commit that referenced this pull request Nov 2, 2021
@tniessen @nodejs-github-bot
test: avoid deep comparisons with literals
dd52c05 
Comparing any value to any non-RegExp literal or undefined using
strictEqual (or notStrictEqual) passes if and only if deepStrictEqual
(or notDeepStrictEqual, respectively) passes.

Unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual
and notDeepStrictEqual when the expected value (i.e., the second
argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

    extend interface Literal <: Expression {
        type: "Literal";
        value: string | boolean | null | number | RegExp | bigint;
    }

The value `undefined` is an `Identifier` with `name: 'undefined'`.

PR-URL: #40634
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Voltrex <[email protected]>
This was referenced Nov 3, 2021
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targos pushed a commit that referenced this pull request Nov 6, 2021
@tniessen @targos
test: avoid deep comparisons with literals
dfd0215 
Comparing any value to any non-RegExp literal or undefined using
strictEqual (or notStrictEqual) passes if and only if deepStrictEqual
(or notDeepStrictEqual, respectively) passes.

Unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual
and notDeepStrictEqual when the expected value (i.e., the second
argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

    extend interface Literal <: Expression {
        type: "Literal";
        value: string | boolean | null | number | RegExp | bigint;
    }

The value `undefined` is an `Identifier` with `name: 'undefined'`.

PR-URL: #40634
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Voltrex <[email protected]>
@targos targos mentioned this pull request Nov 8, 2021
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@tniessen when I land these changes on v16.x-staging, the tests fail. Do you mind backporting this PR?

tniessen added a commit to tniessen/node that referenced this pull request Feb 16, 2022
@tniessen
test: avoid deep comparisons with literals
d23b259 
Comparing any value to any non-RegExp literal or undefined using
strictEqual (or notStrictEqual) passes if and only if deepStrictEqual
(or notDeepStrictEqual, respectively) passes.

Unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual
and notDeepStrictEqual when the expected value (i.e., the second
argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

    extend interface Literal <: Expression {
        type: "Literal";
        value: string | boolean | null | number | RegExp | bigint;
    }

The value `undefined` is an `Identifier` with `name: 'undefined'`.

PR-URL: nodejs#40634
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Voltrex <[email protected]>
@tniessen tniessen mentioned this pull request Feb 16, 2022
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@danielleadams #42021

danielleadams pushed a commit that referenced this pull request Feb 25, 2022
@tniessen @danielleadams
test: avoid deep comparisons with literals
23fc205 
Comparing any value to any non-RegExp literal or undefined using
strictEqual (or notStrictEqual) passes if and only if deepStrictEqual
(or notDeepStrictEqual, respectively) passes.

Unnecessarily using deep comparisons adds confusion.

This patch adds an ESLint rule that forbids the use of deepStrictEqual
and notDeepStrictEqual when the expected value (i.e., the second
argument) is a non-RegExp literal or undefined.

For reference, an ESTree literal is defined as follows.

    extend interface Literal <: Expression {
        type: "Literal";
        value: string | boolean | null | number | RegExp | bigint;
    }

The value `undefined` is an `Identifier` with `name: 'undefined'`.

PR-URL: #40634
Backport-PR-URL: #42021
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Voltrex <[email protected]>
@danielleadams danielleadams mentioned this pull request Mar 3, 2022
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@VoltrexKeyva VoltrexKeyva VoltrexKeyva approved these changes

@BridgeAR BridgeAR BridgeAR approved these changes

@cjihrig cjihrig cjihrig approved these changes

@targos targos targos approved these changes

@Trott Trott Trott approved these changes

@jasnell jasnell jasnell approved these changes

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