Test removal of default locale fallback in Intl.Locale.p.getCollations

[ptomato]

This PR adds baseline tests for the return value of Intl.Locale.p.getCollations() reflecting the situation before normative PR tc39/ecma402#1072 in the first commit, and in the second commit makes the necessary changes for the normative PR.

Note that because the default locale is out-of-band, und-locale.js might pass or fail if the normative change is not implemented, depending on what the environment's default locale is. It should always pass regardless of the environment's default locale if the normative change is implemented correctly. Try running it with LC_ALL=de in the environment, for example.

[ptomato]

Note JSC fails output-array-sorted.js.

[gibson042]

Suggested change

	const testCases = [
	["en", "phonebk"],
	["de", "phonebk"],
	["zh", "stroke"],
	["und", "pinyin"],
	["und", "emoji"],
	];
	for (const [tag, collation] of testCases) {
	assert.compareArray(
	new Intl.Locale(`${tag}-u-co-${collation}`).getCollations(),
	[collation],
	`getCollations() for ${tag}-u-co-${collation} returns only ${collation}`
	);
	assert.compareArray(
	new Intl.Locale(tag, { collation }).getCollations(),
	[collation],
	`getCollations() for ${tag} with { collation: "${collation}" } returns only ${collation}`
	);
	}
	var testCases = [
	["en", "phonebk"],
	["de", "phonebk"],
	["zh", "stroke"],
	["und", "pinyin"],
	["und", "emoji"]
	];
	for (var i = 0; i < testCases.length; i++) {
	var baseName = testCases[i][0];
	var collation = testCases[i][1];
	var fullTag = baseName + "-u-co-" + collation;
	assert.compareArray(
	new Intl.Locale(fullTag).getCollations(),
	[collation],
	"getCollations() for " + fullTag + " returns only " + collation
	);
	assert.compareArray(
	new Intl.Locale(tag, { collation: collation }).getCollations(),
	[collation],
	"getCollations() for " + tag + " with { collation: " + collation + " } returns only " + collation
	);
	}

[gibson042]

Suggested change

	for (const tag of ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"]) {
	const collations = new Intl.Locale(tag).getCollations();
	assert.compareArray(
	collations,
	collations.toSorted(),
	`getCollations() for ${tag} should be sorted in lexicographic code unit order`
	);
	}
	var tags = ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"];
	for (var i = 0; i < tags.length; i++) {
	var tag = tags[i];
	var collations = new Intl.Locale(tag).getCollations();
	var sortedCollations = new Intl.Locale(tag).getCollations().sort();
	assert.compareArray(
	sortedCollations,
	collations,
	"getCollations() for " + tag + " should be sorted in lexicographic code unit order"
	);
	}

[gibson042]

Suggested change

	for (const tag of ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"]) {
	const output = new Intl.Locale(tag).getCollations();
	assert.notSameValue(output.length, 0, `getCollations() for ${tag} has at least one element`);
	assert(!output.includes("standard"), `getCollations() for ${tag} should not contain 'standard'`);
	assert(!output.includes("search"), `getCollations() for ${tag} should not contain 'search'`);
	}
	var tags = ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"];
	for (var i = 0; i < tags.length; i++) {
	var tag = tags[i];
	var collations = new Intl.Locale(tag).getCollations();
	assert.notSameValue(collations.length, 0,
	"getCollations() for " + tag + " has at least one element");
	for (var j = 0; j < collations.length; j++) {
	assert.notSameValue(collations[j], "standard",
	"getCollations() for " + tag + " must not contain 'standard'");
	assert.notSameValue(collations[j], "search",
	"getCollations() for " + tag + " must not contain 'search'");
	}
	}

[gibson042]

Suggested change

	for (const tag of ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"]) {
	assert(
	Array.isArray(new Intl.Locale(tag).getCollations()),
	`getCollations() for ${tag} should return an array`,
	);
	}
	var tags = ["ar", "de", "en", "ja", "ko", "sv", "tr", "zh"];
	for (var i = 0; i < tags.length; i++) {
	var tag = tags[i];
	assert(
	Array.isArray(new Intl.Locale(tag).getCollations()),
	"getCollations() for " + tag + " must return an array"
	);
	}

[gibson042]

Suggested change

	const undLocales = [
	"und",
	"und-US",
	"und-Latn",
	"und-Latn-US",
	"und-u-ca-gregory",
	"und-US-u-nu-latn",
	];
	for (const tag of undLocales) {
	const locale = new Intl.Locale(tag);
	assert.sameValue(
	locale.language,
	"und",
	`"${tag}" has language subtag "und"`
	);
	assert.compareArray(
	locale.getCollations(),
	["emoji", "eor"],
	`getCollations() for "${tag}" returns the root collations`
	);
	}
	var undLocales = [
	"und",
	"und-US",
	"und-Latn",
	"und-Latn-US",
	"und-u-ca-gregory",
	"und-US-u-nu-latn",
	];
	for (var i = 0; i < undLocales.length; i++) {
	var tag = undLocales[i];
	var locale = new Intl.Locale(tag);
	assert.sameValue(
	locale.language,
	"und",
	tag + " must have language subtag 'und'"
	);
	assert.compareArray(
	locale.getCollations(),
	["emoji", "eor"],
	"getCollations() for " + tag + " must return the root collations"
	);
	}

[gibson042]

Suggested change

	for (const tag of ["qfz", "qga-DE", "qgb-ES", "qgc-KR", "qtz-CN"]) {
	assert.compareArray(
	new Intl.Locale(tag).getCollations(),
	["emoji", "eor"],
	`getCollations() for unavailable locale "${tag}" returns the root collations`
	);
	}
	var privateUseTags = ["qfz", "qga-DE", "qgb-ES", "qgc-KR", "qtz-CN"];
	for (var i = 0; i < privateUseTags.length; i++) {
	var tag = privateUseTags[i];
	assert.compareArray(
	new Intl.Locale(tag).getCollations(),
	["emoji", "eor"],
	"getCollations() for unavailable locale " + tag + " must return the root collations"
	);
	}