Refactor lib/rules/__tests__/* test files to migrate to ESM

[ybiquitous]

Which issue, if any, is this issue related to?

Ref #5291

Is there anything in the PR that needs further explanation?

This change is performed by the following script (though it requires a bit of manual).

node to-esm.mjs lib/rules/*/__tests__/index.js

// to-esm.mjs
import { argv, stdout } from 'node:process';
import { readFile, unlink, writeFile } from 'node:fs/promises';
import { execSync } from 'node:child_process';

async function processFile(file) {
	const ruleFile = file.replace('/__tests__/index.js', '/index.js');

	if ((await readFile(ruleFile, 'utf8')).includes('\tdeprecated: true,')) {
		stdout.write(`Skip deprecated ${file}\n`);

		return;
	}

	let lines = (await readFile(file, 'utf8')).split('\n');

	lines = lines.filter((line) => !line.includes('use strict'));

	lines.forEach((line, i) => {
		line = line.replace(
			"const stripIndent = require('common-tags').stripIndent",
			"const { stripIndent } = require('common-tags')",
		);

		line = line.replace(
			"const { messages, ruleName } = require('..');",
			"import rule from '../index.js'; const { messages, ruleName } = rule;",
		);

		line = line.replace(/const (.+) = require\('(\..+)'\)/, 'import $1 from "$2.js"');
		line = line.replace(/const (.+) = require\('(.+)'\)/, 'import $1 from "$2"');

		lines[i] = line;
	});

	const newFile = file.replace(/\.js$/, '.mjs');
	const newContent = `${lines.join('\n')}\n`;

	await writeFile(newFile, newContent);

	stdout.write(`=> ${newFile}\n`);

	await unlink(file);
}

const files = argv.slice(2);

Promise.all(files.map((f) => processFile(f))).then(() => {
	execSync(`npx prettier --loglevel silent --write lib/rules`, { encoding: 'utf8' });
});

Note that this change does NOT include deprecated rules which were removed on the v16 branch.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 35b36b6

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[ybiquitous]

I'm investigating the Out of Memory error on CI (coverage):

<--- Last few GCs --->

[1864:0x5d73de0]   213282 ms: Scavenge (reduce) 1843.8 (2088.5) -> 1843.7 (2088.7) MB, 4.0 / 0.0 ms  (average mu = 0.255, current mu = 0.221) allocation failure; 
[1864:0x5d73de0]   213295 ms: Scavenge (reduce) 1844.2 (2088.7) -> 1843.9 (2089.2) MB, 3.6 / 0.0 ms  (average mu = 0.255, current mu = 0.221) allocation failure; 
[1864:0x5d73de0]   213315 ms: Scavenge (reduce) 1844.7 (2089.2) -> 1844.3 (2089.5) MB, 4.3 / 0.0 ms  (average mu = 0.255, current mu = 0.221) allocation failure; 


<--- JS stacktrace --->

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
 1: 0xb7a940 node::Abort() [node]
 2: 0xa8e823  [node]
 3: 0xd5c990 v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]
 4: 0xd5cd37 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]
 5: 0xf3a435  [node]
 6: 0xf3b338 v8::internal::Heap::RecomputeLimits(v8::internal::GarbageCollector) [node]
 7: 0xf4b843  [node]
 8: 0xf4c6b8 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [node]
 9: 0xf2701e v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [node]
10: 0xf[283](https://github.com/stylelint/stylelint/actions/runs/5433854986/jobs/9885027327#step:6:284)e7 v8::internal::HeapAllocator::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [node]
11: 0xf08930 v8::internal::Factory::AllocateRaw(int, v8::internal::AllocationType, v8::internal::AllocationAlignment) [node]
12: 0xf003a4 v8::internal::FactoryBase<v8::internal::Factory>::AllocateRawWithImmortalMap(int, v8::internal::AllocationType, v8::internal::Map, v8::internal::AllocationAlignment) [node]
13: 0xf0[273](https://github.com/stylelint/stylelint/actions/runs/5433854986/jobs/9885027327#step:6:274)8 v8::internal::FactoryBase<v8::internal::Factory>::NewRawTwoByteString(int, v8::internal::AllocationType) [node]
14: 0x11dfc65 v8::internal::String::SlowFlatten(v8::internal::Isolate*, v8::internal::Handle<v8::internal::ConsString>, v8::internal::AllocationType) [node]
15: 0x1084e79 v8::internal::CompilationCacheTable::LookupScript(v8::internal::Handle<v8::internal::CompilationCacheTable>, v8::internal::Handle<v8::internal::String>, v8::internal::LanguageMode, v8::internal::Isolate*) [node]
16: 0xdfefc5 v8::internal::CompilationCacheScript::Lookup(v8::internal::Handle<v8::internal::String>, v8::internal::ScriptDetails const&, v8::internal::LanguageMode) [node]
17: 0xe0a53b  [node]
18: 0xe0b29a v8::internal::Compiler::GetSharedFunctionInfoForScript(v8::internal::Isolate*, v8::internal::Handle<v8::internal::String>, v8::internal::ScriptDetails const&, v8::ScriptCompiler::CompileOptions, v8::ScriptCompiler::NoCacheReason, v8::internal::NativesFlag) [node]
19: 0xd7f99f  [node]
20: 0xd7fc22 v8::ScriptCompiler::CompileUnboundScript(v8::Isolate*, v8::ScriptCompiler::Source*, v8::ScriptCompiler::CompileOptions, v8::ScriptCompiler::NoCacheReason) [node]
21: 0xb6c6f2 node::contextify::ContextifyScript::New(v8::FunctionCallbackInfo<v8::Value> const&) [node]
22: 0xdbba00  [node]
23: 0xdbbfff v8::internal::Builtin_HandleApiCall(int, unsigned long*, v8::internal::Isolate*) [node]
24: 0x16fb7f9  [node]
Aborted (core dumped)

https://github.com/stylelint/stylelint/actions/runs/5433854986/jobs/9885027327#step:6:255

[ybiquitous]

Switching Jest's coverage provider works! 2724122

I'll extract only the change with another pull request to clarify the PR's purpose.

EDIT: I've just opened PR #7025.

[jeddy3]

Changes on main and filtering the deprecated rules out LGTM.

Thank you!