[Tests] extract common helpers

test/helpers/clearBuffer.js

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+'use strict';
+
+module.exports = function clearBuffer(buffer) {
+	new DataView(buffer).setFloat64(0, 0, true); // clear the buffer
+};

test/helpers/getNamelessFunction.js

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+'use strict';
+
+module.exports = function getNamelessFunction() {
+	var f = Object(function () {});
+	try {
+		delete f.name;
+	} catch (e) { /**/ }
+	return f;
+};

test/helpers/kludgeMatch.js

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+'use strict';
+
+var assign = require('object.assign');
+
+var hasLastIndex = 'lastIndex' in (/a/).exec('a'); // IE 8
+var hasGroups = 'groups' in (/a/).exec('a'); // modern engines
+
+module.exports = function kludgeMatch(R, matchObject) {
+	if (hasGroups) {
+		assign(matchObject, { groups: matchObject.groups });
+	}
+	if (hasLastIndex) {
+		assign(matchObject, { lastIndex: matchObject.lastIndex || R.lastIndex });
+	} else {
+		delete matchObject.lastIndex; // eslint-disable-line no-param-reassign
+	}
+	return matchObject;
+};

test/helpers/makeAsyncFromSyncIterator.js

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+'use strict';
+
+var makeIteratorRecord = require('./makeIteratorRecord');
+
+module.exports = function makeAsyncFromSyncIterator(CreateAsyncFromSyncIterator, end, throwMethod, returnMethod) {
+	var i = 0;
+	var iterator = {
+		next: function next() {
+			try {
+				return {
+					done: i > end,
+					value: i
+				};
+			} finally {
+				i += 1;
+			}
+		},
+		'return': returnMethod,
+		'throw': throwMethod
+	};
+	var syncIteratorRecord = makeIteratorRecord(iterator);
+
+	return CreateAsyncFromSyncIterator(syncIteratorRecord);
+};

test/helpers/makeIteratorRecord.js

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+'use strict';
+
+module.exports = function makeIteratorRecord(iterator) {
+	return {
+		'[[Iterator]]': iterator,
+		'[[NextMethod]]': iterator.next,
+		'[[Done]]': false
+	};
+};

test/helpers/testAsyncIterator.js

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+'use strict';
+
+module.exports = function testAsyncIterator(t, asyncIterator, expected) {
+	var results = arguments.length > 3 ? arguments[3] : [];
+
+	var nextResult = asyncIterator.next();
+
+	return Promise.resolve(nextResult).then(function (result) {
+		results.push(result);
+		if (!result.done && results.length < expected.length) {
+			t.deepEqual(result, { done: false, value: expected[results.length - 1] }, 'result ' + (results.length - 1));
+			return testAsyncIterator(t, asyncIterator, expected, results);
+		}
+
+		t.equal(results.length, expected.length, 'expected ' + expected.length + ', got ' + (result.done ? '' : 'more than ') + results.length);
+		return results.length;
+	});
+};

test/helpers/testIterator.js

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+'use strict';
+
+module.exports = function testIterator(t, iterator, expected) {
+	var resultCount = 0;
+	var result;
+	while (result = iterator.next(), !result.done && resultCount < expected.length + 1) { // eslint-disable-line no-sequences
+		t.deepEqual(result, { done: false, value: expected[resultCount] }, 'result ' + resultCount);
+		resultCount += 1;
+	}
+	t.equal(resultCount, expected.length, 'expected ' + expected.length + ', got ' + (result.done ? '' : 'more than ') + resultCount);
+};

test/helpers/testRESIterator.js

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+'use strict';
+
+var v = require('es-value-fixtures');
+
+var testIterator = require('./testIterator');
+
+module.exports = function testRegExpStringIterator(CreateRegExpStringIterator, t, regex, str, global, unicode, expected) {
+	var iterator = CreateRegExpStringIterator(regex, str, global, unicode);
+	t.equal(typeof iterator, 'object', 'iterator is an object');
+	t.equal(typeof iterator.next, 'function', '`.next` is a function');
+
+	t.test('has symbols', { skip: !v.hasSymbols }, function (st) {
+		st.equal(typeof iterator[Symbol.iterator], 'function', '[`Symbol.iterator`] is a function');
+		st.end();
+	});
+
+	testIterator(t, iterator, expected);
+};

test/helpers/throwsSentinel.js

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+'use strict';
+
+module.exports = function throwsSentinel(fn, sentinel, message) {
+	try {
+		fn();
+		this.fail('did not throw: ' + message);
+	} catch (e) {
+		this.equal(e, sentinel, message);
+	}
+};

test/helpers/v.js

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+'use strict';
+
+var v = require('es-value-fixtures');
+var hasBigInts = require('has-bigints')();
+var isCore = require('is-core-module');
+
+var leadingPoo = '\uD83D';
+var trailingPoo = '\uDCA9';
+var wholePoo = leadingPoo + trailingPoo;
+
+var msPerSecond = 1e3;
+var msPerMinute = 60 * msPerSecond;
+var msPerHour = 60 * msPerMinute;
+var msPerDay = 24 * msPerHour;
+
+var unknowns = [].concat(
+	v.primitives,
+	v.objects
+);
+var allButSyms = [].concat(
+	v.objects,
+	v.nonSymbolPrimitives
+);
+var invalidTATypes = [].concat(
+	v.nonStrings,
+	'not a valid type'
+);
+var nonFiniteNumbers = [].concat(
+	v.infinities,
+	NaN
+);
+var notInts = [].concat(
+	v.nonNumbers,
+	v.nonIntegerNumbers,
+	nonFiniteNumbers,
+	[],
+	new Date()
+);
+
+var elementSizes = {
+	__proto__: null,
+	$Int8Array: 1,
+	$Uint8Array: 1,
+	$Uint8ClampedArray: 1,
+	$Int16Array: 2,
+	$Uint16Array: 2,
+	$Int32Array: 4,
+	$Uint32Array: 4,
+	$BigInt64Array: 8,
+	$BigUint64Array: 8,
+	$Float32Array: 4,
+	$Float64Array: 8
+};
+
+var unclampedUnsignedIntegerTypes = [
+	'Int8',
+	'Int16',
+	'Int32'
+];
+var clampedTypes = [
+	'Uint8C'
+];
+var unclampedSignedIntegerTypes = [
+	'Uint8',
+	'Uint16',
+	'Uint32'
+];
+var unclampedIntegerTypes = [].concat(
+	unclampedUnsignedIntegerTypes,
+	unclampedSignedIntegerTypes
+);
+var floatTypes = [
+	'Float32',
+	'Float64'
+];
+var integerTypes = [].concat(
+	unclampedIntegerTypes,
+	clampedTypes
+);
+var bigIntTypes = [
+	'BigInt64',
+	'BigUint64'
+];
+var numberTypes = [].concat(
+	floatTypes,
+	integerTypes
+);
+var nonUnclampedIntegerTypes = [].concat(
+	floatTypes,
+	bigIntTypes
+);
+var unsignedElementTypes = [].concat(
+	unclampedSignedIntegerTypes,
+	hasBigInts ? 'BigUint64' : []
+);
+var signedElementTypes = [].concat(
+	unclampedUnsignedIntegerTypes,
+	floatTypes,
+	hasBigInts ? 'BigInt64' : []
+);
+var allTypes = [].concat(
+	numberTypes,
+	hasBigInts ? bigIntTypes : []
+);
+var nonTATypes = [].concat(
+	v.nonStrings,
+	'',
+	'Byte'
+);
+
+var canDistinguishSparseFromUndefined = 0 in [undefined]; // IE 6 - 8 have a bug where this returns false
+
+// IE 9 does not throw in strict mode when writability/configurability/extensibility is violated
+var noThrowOnStrictViolation = (function () {
+	try {
+		delete [].length;
+		return true;
+	} catch (e) {
+	}
+	return false;
+}());
+
+var isBigIntTAType = function isBigIntTAType(type) {
+	return type.slice(0, 3) === 'Big';
+};
+
+/* globals postMessage */
+var canDetach = typeof structuredClone === 'function' || typeof postMessage === 'function' || isCore('worker_threads');
+
+module.exports = {
+	poo: {
+		leading: leadingPoo,
+		trailing: trailingPoo,
+		whole: wholePoo
+	},
+	hasBigInts: hasBigInts,
+	msPerSecond: msPerSecond,
+	msPerMinute: msPerMinute,
+	msPerHour: msPerHour,
+	msPerDay: msPerDay,
+	unknowns: unknowns,
+	allButSyms: allButSyms,
+	invalidTATypes: invalidTATypes,
+	nonFiniteNumbers: nonFiniteNumbers,
+	notInts: notInts,
+	elementSizes: elementSizes,
+	unclampedUnsignedIntegerTypes: unclampedUnsignedIntegerTypes,
+	clampedTypes: clampedTypes,
+	unclampedSignedIntegerTypes: unclampedSignedIntegerTypes,
+	unclampedIntegerTypes: unclampedIntegerTypes,
+	floatTypes: floatTypes,
+	integerTypes: integerTypes,
+	bigIntTypes: bigIntTypes,
+	numberTypes: numberTypes,
+	nonUnclampedIntegerTypes: nonUnclampedIntegerTypes,
+	unsignedElementTypes: unsignedElementTypes,
+	signedElementTypes: signedElementTypes,
+	allTypes: allTypes,
+	nonTATypes: nonTATypes,
+	canDistinguishSparseFromUndefined: canDistinguishSparseFromUndefined,
+	noThrowOnStrictViolation: noThrowOnStrictViolation,
+	isBigIntTAType: isBigIntTAType,
+	canDetach: canDetach
+};