/*
 * This file is part of GNU Taler
 * (C) 2020 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.lib.crypto

import kotlin.test.Test
import kotlin.test.assertEquals

@kotlin.ExperimentalStdlibApi
class Sha256Test {

    private val crypto = CryptoFactory.getCrypto()

    @Test
    fun testAbc() {
        assertEquals(
            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
            crypto.sha256("abc".encodeToByteArray()).toHexString()
        )
    }

    @Test
    fun testEmptyString() {
        assertEquals(
            "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
            crypto.sha256("".encodeToByteArray()).toHexString()
        )
    }

    @Test
    fun testAbc448bits() {
        assertEquals(
            "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1",
            crypto.sha256("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".encodeToByteArray()).toHexString()
        )
    }

    @Test
    fun testAbc896bits() {
        assertEquals(
            "cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1",
            crypto.sha256("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu".encodeToByteArray())
                .toHexString()
        )
    }

    @Test
    fun testAMillionAs() {
        val input = ByteArray(1_000_000) { 0x61 }
        assertEquals(
            "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0",
            crypto.sha256(input).toHexString()
        )
    }

}