v

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module hex
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fn test_decode() {
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	assert decode('')! == []
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	assert decode('0')! == [u8(0x0)]
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	assert decode('f')! == [u8(0xf)]
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	assert decode('0f')! == [u8(0x0f)]
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	assert decode('ff')! == [u8(0xff)]
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	assert decode('123')! == [u8(0x1), 0x23]
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	assert decode('1234')! == [u8(0x12), 0x34]
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	assert decode('12345')! == [u8(0x1), 0x23, 0x45]
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	assert decode('0123456789abcdef')! == [u8(0x01), 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]
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	assert decode('123456789ABCDEF')! == [u8(0x01), 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]
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}
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fn test_decode_fails() ! {
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	if x := decode('foo') {
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		return error('expected decode to fail, got ${x}')
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	}
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	if x := decode('g') {
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		return error('expected decode to fail, got ${x}')
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	}
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	if x := decode('000000000g') {
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		return error('expected decode to fail, got ${x}')
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	}
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	if x := decode('_') {
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		return error('expected decode to fail, got ${x}')
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	}
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	if x := decode('!') {
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		return error('expected decode to fail, got ${x}')
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	}
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}
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fn test_encode() {
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	assert encode(decode('')!) == ''
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	assert encode(decode('0')!) == '00'
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	assert encode(decode('f')!) == '0f'
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	assert encode(decode('0f')!) == '0f'
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	assert encode(decode('ff')!) == 'ff'
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	assert encode(decode('123')!) == '0123'
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	assert encode(decode('1234')!) == '1234'
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	assert encode(decode('12345')!) == '012345'
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	assert encode(decode('abcdef')!) == 'abcdef'
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	assert encode(decode('ABCDEF')!) == 'abcdef'
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}
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fn test_decode_0x() {
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	assert decode('0x')! == []
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	assert decode('0x0')! == [u8(0x0)]
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	assert decode('0X1234')! == [u8(0x12), 0x34]
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	assert decode('0x12345')! == [u8(0x1), 0x23, 0x45]
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	assert decode('0x0123456789abcdef')! == [u8(0x01), 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]
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	assert decode('0X123456789ABCDEF')! == [u8(0x01), 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]
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}
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