tja2fumen/testing/test_conversion.py

import os
import shutil
import zipfile
import re
import glob

import pytest

from tja2fumen import main as convert
from tja2fumen.parsers import readFumen
from tja2fumen.constants import COURSE_IDS, NORMALIZE_COURSE


@pytest.mark.parametrize('id_song', [
    pytest.param('genpe'),
    pytest.param('gimcho'),
    pytest.param('imcanz'),
    pytest.param('clsca'),
    pytest.param('linda'),
    pytest.param('senpac'),
    pytest.param('butou5'),
    pytest.param('hol6po'),
    pytest.param('mikdp'),
    pytest.param('ia6cho'),
])
def test_converted_tja_vs_cached_fumen(id_song, tmp_path, entry_point):
    # Define the testing directory
    path_test = os.path.dirname(os.path.realpath(__file__))

    # Define the working directory
    path_temp = os.path.join(tmp_path, id_song)
    os.mkdir(path_temp)

    # Copy input TJA to working directory
    path_tja = os.path.join(path_test, "data", f"{id_song}.tja")
    path_tja_tmp = os.path.join(path_temp, f"{id_song}.tja")
    shutil.copy(path_tja, path_tja_tmp)

    # Convert TJA file to fumen files
    if entry_point == "python-api":
        convert(argv=[path_tja_tmp])
    elif entry_point == "python-cli":
        os.system(f"tja2fumen {path_tja_tmp}")
    elif entry_point == "exe":
        exe_path = glob.glob(os.path.join(os.path.split(path_test)[0], "dist", "*.exe"))[0]
        os.system(f"{exe_path} {path_tja_tmp}")

    # Fetch output fumen paths
    paths_out = glob.glob(os.path.join(path_temp, "*.bin"))
    assert paths_out, f"No bin files generated in {path_temp}"
    order = "xmhne"  # Ura Oni -> Oni -> Hard -> Normal -> Easy
    paths_out = sorted(paths_out, key=lambda s: [order.index(c) if c in order else len(order) for c in s])

    # Extract cached fumen files to working directory
    path_binzip = os.path.join(path_test, "data", f"{id_song}.zip")
    path_bin = os.path.join(path_temp, "ca_bins")
    with zipfile.ZipFile(path_binzip, 'r') as zip_ref:
        zip_ref.extractall(path_bin)

    # Compare cached fumen with generated fumen
    for path_out in paths_out:
        # Difficulty introspection to help with debugging
        i_difficult_id = os.path.basename(path_out).split(".")[0].split("_")[1]
        i_difficulty = NORMALIZE_COURSE[{v: k for k, v in COURSE_IDS.items()}[i_difficult_id]]  # noqa
        # 0. Read fumen data (converted vs. cached)
        co_song = readFumen(path_out, exclude_empty_measures=True)
        ca_song = readFumen(os.path.join(path_bin, os.path.basename(path_out)), exclude_empty_measures=True)
        # 1. Check song headers
        checkValidHeader(co_song.header)
        checkValidHeader(ca_song.header)
        # 2. Check song metadata
        assert_song_property(co_song.header, ca_song.header, 'order')
        assert_song_property(co_song.header, ca_song.header, 'b432_b435_has_branches')
        assert_song_property(co_song, ca_song, 'scoreInit')
        assert_song_property(co_song, ca_song, 'scoreDiff')
        # 3. Check measure data
        for i_measure in range(max([len(co_song.measures), len(ca_song.measures)])):
            # NB: We could assert that len(measures) is the same for both songs, then iterate through zipped measures.
            # But, if there is a mismatched number of measures, we want to know _where_ it occurs. So, we let the
            # comparison go on using the max length of both songs until something else fails.
            co_measure = co_song.measures[i_measure]
            ca_measure = ca_song.measures[i_measure]
            # 3a. Check measure metadata
            assert_song_property(co_measure, ca_measure, 'bpm', i_measure, abs=0.01)
            assert_song_property(co_measure, ca_measure, 'fumenOffsetStart', i_measure, abs=0.15)
            assert_song_property(co_measure, ca_measure, 'gogo', i_measure)
            assert_song_property(co_measure, ca_measure, 'barline', i_measure)

            # NB: KAGEKIYO's fumen has some strange details that can't be replicated using the TJA charting format.
            # So, for now, we use a special case to skip checking A) notes for certain measures and B) branchInfo
            if id_song == 'genpe':
                # A) The 2/4 measures in the Ura of KAGEKIYO's official Ura fumen don't match the wikiwiki.jp/TJA
                # charts. In the official fumen, the note ms offsets of branches 5/12/17/etc. go _past_ the duration of
                # the measure. This behavior is impossible to represent using the TJA format, so we skip checking notes
                # for these measures, since the rest of the measures have perfect note ms offsets anyway.
                if i_difficult_id == "x" and i_measure in [5, 6, 12, 13, 17, 18, 26, 27, 46, 47, 51, 52, 56, 57]:
                    continue
                # B) The branching condition for KAGEKIYO is very strange (accuracy for the 7 big notes in the song)
                # So, we only test the branchInfo bytes for non-KAGEKIYO songs:
            else:
                assert_song_property(co_measure, ca_measure, 'branchInfo', i_measure)

            # 3b. Check measure notes
            for i_branch in ['normal', 'advanced', 'master']:
                co_branch = co_measure.branches[i_branch]
                ca_branch = ca_measure.branches[i_branch]
                # NB: We only check speed for non-empty branches, as fumens store speed changes even for empty branches
                if co_branch.length != 0:
                    assert_song_property(co_branch, ca_branch, 'speed', i_measure, i_branch)
                # NB: We could assert that len(notes) is the same for both songs, then iterate through zipped notes.
                # But, if there is a mismatched number of notes, we want to know _where_ it occurs. So, we let the
                # comparison go on using the max length of both branches until something else fails.
                for i_note in range(max([co_branch.length, ca_branch.length])):
                    co_note = co_branch.notes[i_note]
                    ca_note = ca_branch.notes[i_note]
                    assert_song_property(co_note, ca_note, 'note_type', i_measure, i_branch, i_note, func=normalize_type)
                    assert_song_property(co_note, ca_note, 'pos', i_measure, i_branch, i_note, abs=0.1)
                    # NB: Drumroll duration doesn't always end exactly on a beat. Plus, TJA charters often eyeball
                    #     drumrolls, leading them to be often off by a 1/4th/8th/16th/32th/etc. These charting errors
                    #     are fixable, but tedious to do when writing tests. So, I've added a try/except so that they
                    #     can be checked locally with a breakpoint when adding new songs, but so that fixing every
                    #     duration-related chart error isn't 100% mandatory.
                    try:
                        assert_song_property(co_note, ca_note, 'duration', i_measure, i_branch, i_note, abs=25.0)
                    except AssertionError:
                        pass
                    if ca_note.note_type not in ["Balloon", "Kusudama"]:
                        assert_song_property(co_note, ca_note, 'scoreInit', i_measure, i_branch, i_note)
                        assert_song_property(co_note, ca_note, 'scoreDiff', i_measure, i_branch, i_note)
                    # NB: 'item' still needs to be implemented: https://github.com/vivaria/tja2fumen/issues/17
                    # assert_song_property(co_note, ca_note, 'item', i_measure, i_branch, i_note)


def assert_song_property(converted_obj, cached_obj, prop, measure=None, branch=None, note=None, func=None, abs=None):
    # NB: TJA parser/converter uses 0-based indexing, but TJA files use 1-based indexing.
    #     So, we increment 1 in the error message to more easily identify problematic lines in TJA files.
    msg_failure = f"'{prop}' mismatch"
    msg_failure += f": measure '{measure+1}'" if measure is not None else ""
    msg_failure += f", branch '{branch}'" if branch is not None else ""
    msg_failure += f", note '{note+1}'" if note is not None else ""
    converted_val = converted_obj.__getattribute__(prop)
    cached_val = cached_obj.__getattribute__(prop)
    if func:
        assert func(converted_val) == func(cached_val), msg_failure
    elif abs:
        assert converted_val == pytest.approx(cached_val, abs=abs), msg_failure
    else:
        assert converted_val == cached_val, msg_failure


def normalize_type(note_type):
    return re.sub(r'[0-9]', '', note_type)


def checkValidHeader(header):
    assert len(header.raw_bytes)                       == 520
    assert header.b432_b435_has_branches               in [0, 1]
    assert header.b436_b439_hp_max                     == 10000
    assert header.b440_b443_hp_clear                   in [6000, 7000, 8000]
    assert 10   <= header.b444_b447_hp_gain_good       <= 1020
    assert 5    <= header.b448_b451_hp_gain_ok         <= 1020
    assert -765 <= header.b452_b455_hp_loss_bad        <= -20
    assert header.b456_b459_normal_normal_ratio        <= 65536
    assert header.b460_b463_normal_professional_ratio  <= 65536
    assert header.b464_b467_normal_master_ratio        <= 65536
    assert header.b468_b471_branch_points_good         in [20, 0, 1, 2]
    assert header.b472_b475_branch_points_ok           in [10, 0, 1]
    assert header.b476_b479_branch_points_bad          == 0
    assert header.b480_b483_branch_points_drumroll     in [1, 0]
    assert header.b484_b487_branch_points_good_BIG     in [20, 0, 1, 2]
    assert header.b488_b491_branch_points_ok_BIG       in [10, 0, 1]
    assert header.b492_b495_branch_points_drumroll_BIG in [1, 0]
    assert header.b496_b499_branch_points_balloon      in [30, 0, 1]
    assert header.b500_b503_branch_points_kusudama     in [30, 0]