66 lines
2.1 KiB
JavaScript
66 lines
2.1 KiB
JavaScript
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'use strict';
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var test = require('tape');
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var inspect = require('object-inspect');
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var hasBigInts = require('has-bigints')();
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var hasToStringTag = require('has-tostringtag/shams')();
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var forEach = require('for-each');
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var v = require('es-value-fixtures');
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var isBigInt = require('../');
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test('non-BigInt values', function (t) {
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/** @type {(typeof v.primitives[number] | object)[]} */
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var nonBigInts = v.nonBigInts.concat(
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Object(true),
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Object(false),
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// @ts-expect-error TS sucks with concat
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{},
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[],
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/a/g,
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new Date(),
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function () {},
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NaN,
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v.symbols
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);
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t.plan(nonBigInts.length);
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forEach(nonBigInts, function (nonBigInt) {
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t.equal(false, isBigInt(nonBigInt), inspect(nonBigInt) + ' is not a BigInt');
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});
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t.end();
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});
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test('faked BigInt values', function (t) {
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t.test('real BigInt valueOf', { skip: !hasBigInts }, function (st) {
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var fakeBigInt = { valueOf: function () { return BigInt(42); } };
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st.equal(false, isBigInt(fakeBigInt), 'object with valueOf returning a BigInt is not a BigInt');
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st.end();
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});
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t.test('faked @@toStringTag', { skip: !hasBigInts || !hasToStringTag }, function (st) {
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/** @type {{ valueOf(): unknown; [Symbol.toStringTag]?: unknown }} */
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var fakeBigInt = { valueOf: function () { return BigInt(42); } };
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fakeBigInt[Symbol.toStringTag] = 'BigInt';
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st.equal(false, isBigInt(fakeBigInt), 'object with fake BigInt @@toStringTag and valueOf returning a BigInt is not a BigInt');
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/** @type {{ valueOf(): unknown; [Symbol.toStringTag]?: unknown }} */
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var notSoFakeBigInt = { valueOf: function () { return 42; } };
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notSoFakeBigInt[Symbol.toStringTag] = 'BigInt';
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st.equal(false, isBigInt(notSoFakeBigInt), 'object with fake BigInt @@toStringTag and valueOf not returning a BigInt is not a BigInt');
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st.end();
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});
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var fakeBigIntString = { toString: function () { return '42n'; } };
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t.equal(false, isBigInt(fakeBigIntString), 'object with toString returning 42n is not a BigInt');
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t.end();
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});
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test('BigInt support', { skip: !hasBigInts }, function (t) {
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forEach(v.bigints.concat(Object(BigInt(42))), function (bigInt) {
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t.equal(true, isBigInt(bigInt), inspect(bigInt) + ' is a BigInt');
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});
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t.end();
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});
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