gp2040ce-binary-tools/tests/test_builder.py

"""Tests for the image builder module."""
import os
import sys

import pytest
from decorator import decorator

from gp2040ce_bintools import get_config_pb2
from gp2040ce_bintools.builder import (FirmwareLengthError, combine_firmware_and_config, pad_firmware_up_to_storage,
                                       replace_config_in_binary, write_new_config_to_filename)
from gp2040ce_bintools.storage import get_config, get_config_footer, get_storage_section

HERE = os.path.dirname(os.path.abspath(__file__))


@decorator
def with_pb2s(test, *args, **kwargs):
    """Wrap a test with precompiled pb2 files on the path."""
    proto_path = os.path.join(HERE, 'test-files', 'pb2-files')
    sys.path.append(proto_path)

    test(*args, **kwargs)

    sys.path.pop()
    del sys.modules['config_pb2']


def test_padding_firmware(firmware_binary):
    """Test that firmware is padded to the expected size."""
    padded = pad_firmware_up_to_storage(firmware_binary)
    assert len(padded) == 2088960


def test_firmware_plus_storage(firmware_binary, storage_dump):
    """Test that combining firmware and storage produces a valid combined binary."""
    whole_board = combine_firmware_and_config(firmware_binary, storage_dump)
    # if this is valid, we should be able to find the storage and footer again
    storage = get_storage_section(whole_board)
    footer_size, _, _ = get_config_footer(storage)
    assert footer_size == 2032


def test_firmware_plus_config_binary(firmware_binary, config_binary):
    """Test that combining firmware and storage produces a valid combined binary."""
    whole_board = combine_firmware_and_config(firmware_binary, config_binary)
    # if this is valid, we should be able to find the storage and footer again
    storage = get_storage_section(whole_board)
    footer_size, _, _ = get_config_footer(storage)
    assert footer_size == 2032


def test_replace_config_in_binary(config_binary):
    """Test that a config binary is placed in the storage location of a source binary to overwrite."""
    whole_board = replace_config_in_binary(bytearray(b'\x00' * 3 * 1024 * 1024), config_binary)
    assert len(whole_board) == 3 * 1024 * 1024
    # if this is valid, we should be able to find the storage and footer again
    storage = get_storage_section(whole_board)
    footer_size, _, _ = get_config_footer(storage)
    assert footer_size == 2032


def test_replace_config_in_binary_not_big_enough(config_binary):
    """Test that a config binary is placed in the storage location of a source binary to pad."""
    whole_board = replace_config_in_binary(bytearray(b'\x00' * 1 * 1024 * 1024), config_binary)
    assert len(whole_board) == 2 * 1024 * 1024
    # if this is valid, we should be able to find the storage and footer again
    storage = get_storage_section(whole_board)
    footer_size, _, _ = get_config_footer(storage)
    assert footer_size == 2032


def test_padding_firmware_too_big(firmware_binary):
    """Test that firmware is padded to the expected size."""
    with pytest.raises(FirmwareLengthError):
        _ = pad_firmware_up_to_storage(firmware_binary + firmware_binary + firmware_binary)


@with_pb2s
def test_write_new_config_to_whole_board(whole_board_dump, tmp_path):
    """Test that the config can be overwritten on a whole board dump."""
    tmp_file = os.path.join(tmp_path, 'whole-board-dump-copy.bin')
    with open(tmp_file, 'wb') as file:
        file.write(whole_board_dump)
    # reread just in case
    with open(tmp_file, 'rb') as file:
        board_dump = file.read()

    config = get_config(get_storage_section(board_dump))
    assert config.boardVersion == 'v0.7.2'
    config.boardVersion = 'v0.7.2-COOL'
    write_new_config_to_filename(config, tmp_file, inject=True)

    # read new file
    with open(tmp_file, 'rb') as file:
        new_board_dump = file.read()
    config = get_config(get_storage_section(new_board_dump))
    assert config.boardVersion == 'v0.7.2-COOL'
    assert len(board_dump) == len(new_board_dump)


@with_pb2s
def test_write_new_config_to_firmware(firmware_binary, tmp_path):
    """Test that the config can be added on a firmware."""
    tmp_file = os.path.join(tmp_path, 'firmware-copy.bin')
    with open(tmp_file, 'wb') as file:
        file.write(firmware_binary)

    config_pb2 = get_config_pb2()
    config = config_pb2.Config()
    config.boardVersion = 'v0.7.2-COOL'
    write_new_config_to_filename(config, tmp_file, inject=True)

    # read new file
    with open(tmp_file, 'rb') as file:
        new_board_dump = file.read()
    config = get_config(get_storage_section(new_board_dump))
    assert config.boardVersion == 'v0.7.2-COOL'
    assert len(new_board_dump) == 2 * 1024 * 1024


@with_pb2s
def test_write_new_config_to_config_bin(firmware_binary, tmp_path):
    """Test that the config can be written to a file."""
    tmp_file = os.path.join(tmp_path, 'config.bin')
    config_pb2 = get_config_pb2()
    config = config_pb2.Config()
    config.boardVersion = 'v0.7.2-COOL'
    write_new_config_to_filename(config, tmp_file)

    # read new file
    with open(tmp_file, 'rb') as file:
        config_dump = file.read()
    config = get_config(config_dump)
    config_size, _, _ = get_config_footer(config_dump)
    assert config.boardVersion == 'v0.7.2-COOL'
    assert len(config_dump) == config_size + 12