// Copyright 2020-2021 IOTA Stiftung
// SPDX-License-Identifier: Apache-2.0

use core::str::FromStr;

use bee_block::BlockId;
use packable::PackableExt;

const BLOCK_ID: &str = "0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649";

#[test]
fn debug_impl() {
    assert_eq!(
        format!("{:?}", BlockId::from_str(BLOCK_ID).unwrap()),
        "BlockId(0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649)"
    );
}

#[test]
fn from_str_valid() {
    BlockId::from_str(BLOCK_ID).unwrap();
}

#[test]
fn null() {
    assert_eq!(
        format!("{:?}", BlockId::null()),
        "BlockId(0x0000000000000000000000000000000000000000000000000000000000000000)"
    );
}

#[test]
fn from_to_str() {
    assert_eq!(BLOCK_ID, BlockId::from_str(BLOCK_ID).unwrap().to_string());
}

// Validate that the length of a packed `BlockId` matches the declared `packed_len()`.
#[test]
fn packed_len() {
    let block_id = BlockId::from_str(BLOCK_ID).unwrap();

    assert_eq!(block_id.packed_len(), 32);
    assert_eq!(block_id.pack_to_vec().len(), 32);
}

// Validate that a `unpack` ∘ `pack` round-trip results in the original block id.
#[test]
fn pack_unpack_valid() {
    let block_id = BlockId::from_str(BLOCK_ID).unwrap();
    let packed_block_id = block_id.pack_to_vec();

    assert_eq!(packed_block_id.len(), block_id.packed_len());
    assert_eq!(
        block_id,
        PackableExt::unpack_verified(&mut packed_block_id.as_slice(), &()).unwrap()
    );
}