import { test } from '@japa/runner'
import { sniffContentType } from '#lib/content/sniff'

test.group('content / sniff', () => {
  test('a Windows executable: MZ with a PE header where the DOS header points', ({ assert }) => {
    const exe = Buffer.alloc(0x100)
    exe.write('MZ', 0, 'latin1')
    exe.writeUInt32LE(0x80, 0x3c)
    exe.write('PE\0\0', 0x80, 'latin1')
    assert.equal(sniffContentType(exe), 'exe')
    // MZ alone (random data, a text) is no executable.
    const mz = Buffer.alloc(0x100)
    mz.write('MZ', 0, 'latin1')
    assert.isNull(sniffContentType(mz))
    // A pointer past the data: none.
    mz.writeUInt32LE(0xffff, 0x3c)
    assert.isNull(sniffContentType(mz))
    assert.equal(sniffContentType(Buffer.from([0x1a, 0x45, 0xdf, 0xa3, 0, 0, 0, 0])), 'matroska')
  })
})