nim-stint/tests/test_uint_endians2.nim

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# Stint
# Copyright 2018 Status Research & Development GmbH
# Licensed under either of
#
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
#
# at your option. This file may not be copied, modified, or distributed except according to those terms.
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import ../stint, unittest, stew/byteutils, test_helpers
template chkToBytesLE(chk: untyped, bits: int, hex: string) =
let x = fromHex(StUint[bits], hex)
chk toBytes(x, littleEndian).toHex() == x.dumpHex(littleEndian)
template chkToBytesBE(chk: untyped, bits: int, hex: string) =
let x = fromHex(StUint[bits], hex)
chk toBytes(x, bigEndian).toHex() == x.dumpHex(bigEndian)
template chkFromBytesBE(chk: untyped, bits: int, hex: string) =
let x = fromHex(StUint[bits], hex)
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let z = fromBytesBE(StUint[bits], toByteArrayBE(x))
chk z == x
template chkFromBytesLE(chk: untyped, bits: int, hex: string) =
let x = fromHex(StUint[bits], hex)
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let z = fromBytesLE(StUint[bits], toByteArrayLE(x))
chk z == x
template chkEndians(chkFunc, tst, name: untyped) =
tst astToStr(name).substr(3):
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name(chkFunc, 64, "abcdef1234567890")
name(chkFunc, 128, "abcdef1234567890abcdef1234567890")
name(chkFunc, 256, "abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890")
template testEndians(chkFunc, tst: untyped) =
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chkEndians(chkFunc, tst, chkToBytesLE)
chkEndians(chkFunc, tst, chkToBytesBE)
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chkEndians(chkFunc, tst, chkFromBytesLE)
chkEndians(chkFunc, tst, chkFromBytesBE)
static:
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testEndians(ctCheck, ctTest)
suite "Testing endians":
test "Endians give sane results":
check:
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1.u128.toByteArrayBE() ==
[0'u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]
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1.u128.toByteArrayLE() ==
[1'u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
1.u128 == UInt128.fromBytesBE(
[0'u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1])
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1.u128 == UInt128.fromBytesLE(
[1'u8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
testEndians(check, test)