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test_buffer_indexof.cjs
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test_buffer_indexof.cjs
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const assert = require('node:assert');
const headers = Buffer.from('abc\r\n\r\ndef');
assert.strictEqual(headers.indexOf('\r\n\r\n'), 3);
assert.strictEqual(headers.indexOf(Buffer.from('\r\n\r\n')), 3);
assert.strictEqual(headers.indexOf(new Uint8Array([13, 10, 13, 10])), 3);
assert.strictEqual(headers.indexOf(0x0d), 3);
const repeated = Buffer.from('abcabc');
assert.strictEqual(repeated.indexOf('abc', 1), 3);
assert.strictEqual(repeated.indexOf('abc', -3), 3);
assert.strictEqual(repeated.indexOf('', 99), 6);
assert.strictEqual(repeated.indexOf('', -99), 0);
assert.strictEqual(Buffer.from('aabbcc', 'hex').indexOf('bb', 'hex'), 1);
assert.strictEqual(Buffer.from('aabbcc', 'hex').indexOf('bb', 0, 'hex'), 1);
assert.strictEqual(Buffer.from('aabbcc', 'hex').indexOf('bbz', 0, 'hex'), 1);
assert.strictEqual(Buffer.from('aabbcc', 'hex').indexOf('b', 0, 'hex'), 0);
assert.strictEqual(Buffer.from('a\0b\0').indexOf('b', 0, 'ucs2'), 2);
assert.strictEqual(Buffer.from([0xe9, 0]).indexOf('é', 0, 'ucs2'), 0);
assert.deepStrictEqual([...Buffer.from('é', 'ucs2')], [0xe9, 0]);
assert.strictEqual(Buffer.from([0xe9, 0]).toString('ucs2'), 'é');
assert.strictEqual(Buffer.from('ĀΩ', 'ucs2').toString('ucs2'), 'ĀΩ');
assert.strictEqual(Buffer.from([0x81, 0x7e]).readUInt16BE(0), 33150);
const shortFrameHeader = Buffer.alloc(2);
assert.strictEqual(shortFrameHeader.writeUInt16BE(0x817e, 0), 2);
assert.deepStrictEqual([...shortFrameHeader], [0x81, 0x7e]);
const longFrameHeader = Buffer.alloc(10);
assert.strictEqual(longFrameHeader.writeUIntBE(0x010203040506, 4, 6), 10);
assert.deepStrictEqual([...longFrameHeader.slice(4)], [1, 2, 3, 4, 5, 6]);
function assertThrowsTypeError(fn) {
try {
fn();
} catch (error) {
assert.strictEqual(error instanceof TypeError, true);
return;
}
assert.fail('expected TypeError');
}
function assertThrowsRangeError(fn) {
try {
fn();
} catch (error) {
assert.strictEqual(error instanceof RangeError, true);
return;
}
assert.fail('expected RangeError');
}
function assertThrows(fn) {
try {
fn();
} catch {
return;
}
assert.fail('expected throw');
}
assertThrowsTypeError(() => Buffer.from('abc').indexOf({}));
assertThrowsTypeError(() => Buffer.from('abc').indexOf('a', 0, 'not-an-encoding'));
{
const b = Buffer.alloc(2);
assertThrows(() => b.writeUInt16BE(0x1234, -1));
assert.deepStrictEqual([...b], [0, 0]);
assertThrows(() => b.writeUIntBE(0x1234, -1, 2));
assertThrows(() => b.readUInt16BE(-1));
}
{
const b = Buffer.alloc(6);
assertThrowsRangeError(() => b.writeUInt16BE(0x10000, 0));
assertThrowsRangeError(() => b.writeUInt16BE(-1, 0));
assertThrowsRangeError(() => b.writeUIntBE(0x10000, 0, 2));
assertThrowsRangeError(() => b.writeUIntBE(-1, 0, 2));
assertThrowsRangeError(() => b.writeUIntBE(2 ** 48, 0, 6));
assert.deepStrictEqual([...b], [0, 0, 0, 0, 0, 0]);
}
console.log('buffer:indexof:ok');

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