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utils.test.ts
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import type { Host } from '#types.js';
import * as utils from '#utils.js';
describe('utils', () => {
test('detect IPv4 mapped IPv6 addresses', () => {
expect(utils.isIPv4MappedIPv6('::ffff:127.0.0.1')).toBe(true);
expect(utils.isIPv4MappedIPv6('::ffff:7f00:1')).toBe(true);
expect(utils.isIPv4MappedIPv6('::')).toBe(false);
expect(utils.isIPv4MappedIPv6('::1')).toBe(false);
expect(utils.isIPv4MappedIPv6('127.0.0.1')).toBe(false);
expect(utils.isIPv4MappedIPv6('::ffff:4a7d:2b63')).toBe(true);
expect(utils.isIPv4MappedIPv6('::ffff:7f00:800')).toBe(true);
expect(utils.isIPv4MappedIPv6('::ffff:255.255.255.255')).toBe(true);
});
test('detect IPv4 mapped IPv6 Dec addresses', () => {
expect(utils.isIPv4MappedIPv6Dec('::ffff:127.0.0.1')).toBe(true);
expect(utils.isIPv4MappedIPv6Dec('::ffff:7f00:1')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('::')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('::1')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('127.0.0.1')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('::ffff:4a7d:2b63')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('::ffff:7f00:800')).toBe(false);
expect(utils.isIPv4MappedIPv6Dec('::ffff:255.255.255.255')).toBe(true);
});
test('detect IPv4 mapped IPv6 Hex addresses', () => {
expect(utils.isIPv4MappedIPv6Hex('::ffff:127.0.0.1')).toBe(false);
expect(utils.isIPv4MappedIPv6Hex('::ffff:7f00:1')).toBe(true);
expect(utils.isIPv4MappedIPv6Hex('::')).toBe(false);
expect(utils.isIPv4MappedIPv6Hex('::1')).toBe(false);
expect(utils.isIPv4MappedIPv6Hex('127.0.0.1')).toBe(false);
expect(utils.isIPv4MappedIPv6Hex('::ffff:4a7d:2b63')).toBe(true);
expect(utils.isIPv4MappedIPv6Hex('::ffff:7f00:800')).toBe(true);
expect(utils.isIPv4MappedIPv6Hex('::ffff:255.255.255.255')).toBe(false);
});
test('to IPv4 mapped IPv6 addresses Dec', () => {
expect(utils.toIPv4MappedIPv6Dec('127.0.0.1')).toBe('::ffff:127.0.0.1');
expect(utils.toIPv4MappedIPv6Dec('0.0.0.0')).toBe('::ffff:0.0.0.0');
expect(utils.toIPv4MappedIPv6Dec('255.255.255.255')).toBe(
'::ffff:255.255.255.255',
);
expect(utils.toIPv4MappedIPv6Dec('74.125.43.99')).toBe(
'::ffff:74.125.43.99',
);
});
test('to IPv4 mapped IPv6 addresses Hex', () => {
expect(utils.toIPv4MappedIPv6Hex('127.0.0.1')).toBe('::ffff:7f00:1');
expect(utils.toIPv4MappedIPv6Hex('0.0.0.0')).toBe('::ffff:0:0');
expect(utils.toIPv4MappedIPv6Hex('255.255.255.255')).toBe(
'::ffff:ffff:ffff',
);
expect(utils.toIPv4MappedIPv6Hex('74.125.43.99')).toBe('::ffff:4a7d:2b63');
});
test('from IPv4 mapped IPv6 addresses', () => {
expect(utils.fromIPv4MappedIPv6('::ffff:7f00:1')).toBe('127.0.0.1');
expect(utils.fromIPv4MappedIPv6('::ffff:127.0.0.1')).toBe('127.0.0.1');
expect(utils.fromIPv4MappedIPv6('::ffff:0.0.0.0')).toBe('0.0.0.0');
expect(utils.fromIPv4MappedIPv6('::ffff:255.255.255.255')).toBe(
'255.255.255.255',
);
expect(utils.fromIPv4MappedIPv6('::ffff:ffff:ffff')).toBe(
'255.255.255.255',
);
expect(utils.fromIPv4MappedIPv6('::ffff:0:0')).toBe('0.0.0.0');
expect(utils.fromIPv4MappedIPv6('::ffff:4a7d:2b63')).toBe('74.125.43.99');
expect(utils.fromIPv4MappedIPv6('::ffff:7f00:800')).toBe('127.0.8.0');
expect(utils.fromIPv4MappedIPv6('::ffff:800:800')).toBe('8.0.8.0');
expect(utils.fromIPv4MappedIPv6('::ffff:0:0')).toBe('0.0.0.0');
// Converting from ::ffff:7f00:1 to ::ffff:127.0.0.1
expect(
utils.toIPv4MappedIPv6Dec(utils.fromIPv4MappedIPv6('::ffff:7f00:1')),
).toBe('::ffff:127.0.0.1');
});
test('to canonical IP address', () => {
// IPv4 -> IPv4
expect(utils.toCanonicalIP('127.0.0.1')).toBe('127.0.0.1');
expect(utils.toCanonicalIP('0.0.0.0')).toBe('0.0.0.0');
expect(utils.toCanonicalIP('255.255.255.255')).toBe('255.255.255.255');
expect(utils.toCanonicalIP('74.125.43.99')).toBe('74.125.43.99');
// IPv4 mapped hex -> IPv4
expect(utils.toCanonicalIP('::ffff:7f00:1')).toBe('127.0.0.1');
expect(utils.toCanonicalIP('::ffff:0:0')).toBe('0.0.0.0');
expect(utils.toCanonicalIP('::ffff:ffff:ffff')).toBe('255.255.255.255');
expect(utils.toCanonicalIP('::ffff:4a7d:2b63')).toBe('74.125.43.99');
// IPv4 mapped dec -> IPv4
expect(utils.toCanonicalIP('::ffff:127.0.0.1')).toBe('127.0.0.1');
expect(utils.toCanonicalIP('::ffff:0.0.0.0')).toBe('0.0.0.0');
expect(utils.toCanonicalIP('::ffff:255.255.255.255')).toBe(
'255.255.255.255',
);
expect(utils.toCanonicalIP('::ffff:74.125.43.99')).toBe('74.125.43.99');
// IPv6 -> IPv6
expect(utils.toCanonicalIP('::1234:7f00:1')).toBe('::1234:7f00:1');
expect(utils.toCanonicalIP('::1234:0:0')).toBe('::1234:0:0');
expect(utils.toCanonicalIP('::1234:ffff:ffff')).toBe('::1234:ffff:ffff');
expect(utils.toCanonicalIP('::1234:4a7d:2b63')).toBe('::1234:4a7d:2b63');
});
test('resolves zero IP to local IP', () => {
expect(utils.resolvesZeroIP('0.0.0.0' as Host)).toBe('127.0.0.1');
expect(utils.resolvesZeroIP('::' as Host)).toBe('::1');
expect(utils.resolvesZeroIP('::0' as Host)).toBe('::1');
expect(utils.resolvesZeroIP('::ffff:0.0.0.0' as Host)).toBe(
'::ffff:127.0.0.1',
);
expect(utils.resolvesZeroIP('::ffff:0:0' as Host)).toBe('::ffff:127.0.0.1');
// Preserves if not a zero IP
expect(utils.resolvesZeroIP('1.1.1.1' as Host)).toBe('1.1.1.1');
expect(utils.resolvesZeroIP('::2' as Host)).toBe('::2');
expect(utils.resolvesZeroIP('::ffff:7f00:1' as Host)).toBe('::ffff:7f00:1');
});
});