import os
import traceback
import logging

log = logging.getLogger(__name__)


"""
Basic code for loading all NT files in test/nt folder
The actual tests are done in test_roundtrip
"""


def _get_test_files_formats():
    for f in os.listdir("test/nt"):
        fpath = "test/nt/" + f
        if f.endswith(".rdf"):
            yield fpath, "xml"
        elif f.endswith(".nt"):
            yield fpath, "nt"


def all_nt_files():
    skiptests = [
        # illegal literal as subject
        "test/nt/literals-01.nt",
        "test/nt/keywords-08.nt",
        "test/nt/paths-04.nt",
        "test/nt/numeric-01.nt",
        "test/nt/numeric-02.nt",
        "test/nt/numeric-03.nt",
        "test/nt/numeric-04.nt",
        "test/nt/numeric-05.nt",
        # illegal variables
        "test/nt/formulae-01.nt",
        "test/nt/formulae-02.nt",
        "test/nt/formulae-03.nt",
        "test/nt/formulae-05.nt",
        "test/nt/formulae-06.nt",
        "test/nt/formulae-10.nt",
        # illegal bnode as predicate
        "test/nt/paths-06.nt",
        "test/nt/anons-02.nt",
        "test/nt/anons-03.nt",
        "test/nt/qname-01.nt",
        "test/nt/lists-06.nt",
    ]
    for fpath, fmt in _get_test_files_formats():
        if fpath in skiptests:
            log.debug("Skipping %s, known issue" % fpath)
        else:
            yield fpath, fmt