Function normalizeString

test/checkArrayExpectation.js:30–76

(str, testDirectory)

 * @returns {string} normalized string
 */
const normalizeString = (str, testDirectory) => {
	if (!str) return str;
	const root = getWebpackRoot(testDirectory);
	// Replace more-specific test dir first, then the broader root
	str = str.replace(new RegExp(quoteMeta(testDirectory), "g"), "<TEST_DIR>");
	if (root) {
		str = str.replace(new RegExp(quoteMeta(root), "g"), "<WEBPACK_ROOT>");
		// Replace ancestor directories above webpack root.
		// The resolver walks up to the filesystem root looking for
		// node_modules, producing paths like /Users/x/node_modules.
		let ancestor = path.dirname(root);
		while (ancestor !== path.dirname(ancestor)) {
			str = str.replace(new RegExp(quoteMeta(ancestor), "g"), "<ANCESTOR>");
			ancestor = path.dirname(ancestor);
		}
	}
	// Normalize the output directory suite name (e.g. test/js/ConfigTestCases/
	// vs test/js/ConfigCacheTestCases/) so all suites produce identical snapshots.
	str = str.replace(/(<WEBPACK_ROOT>\/test\/js\/)[^/]+\//g, "$1<OUTPUT>/");
	// Strip stack trace lines — line numbers vary across Node.js versions
	// and between runs (e.g. processTicksAndRejections).
	str = str
		.split("\n")
		.filter((line) => !/^\s+at\s/.test(line))
		.join("\n")
		.replace(/\n{3,}/g, "\n\n")
		.trim();
	// Normalize engine-specific JSON.parse error text (V8 "Unexpected token …
	// (0x..)" / "… in JSON …" vs JSC/Bun "JSON Parse error: …") so JSON
	// type-import "Module parse failed" snapshots match across runtimes. The
	// acorn "(line:col)" parse errors are engine-independent and left as-is.
	str = str.replace(
		/Module parse failed: (?:JSON Parse error:|Unexpected token "[^"]*" \(0x|Unexpected \S+ in JSON|Unexpected end of JSON input|Unexpected non-whitespace character after JSON)[\s\S]*?(?=\nYou may need an appropriate loader)/g,
		"Module parse failed: <JSON parse error>"
	);
	// Normalize JSC (Bun) magic-comment parse phrasing to the V8 form: JSC
	// quotes the token and appends "Expected …", V8 does neither.
	str = str.replace(/(Unexpected token) '([^']*)'\. Expected[^\n]*/g, "$1 $2");
	str = str.replace(/(Unexpected identifier)\. Expected[^\n]*/g, "$1");
	// Normalize "Unexpected token" messages — quoting and detail
	// format varies across Node.js versions (e.g. with/without quotes,
	// hex codes, trailing context).
	str = str.replace(/(Unexpected token) '([^']*)'$/gm, "$1 $2");
	str = str.replace(/(Unexpected token[^)]*\))[^\n]*(?:\n['"])?/g, "$1");
	str = str.replace(/\\/g, "/");
	return str;
};

/**
 * Serializes an array of error/warning objects into a normalized form