from lingua.extractors import check_c_format
from lingua.extractors import Keyword
from lingua.extractors import Extractor
import pytest


def test_no_format():
    flags = []
    check_c_format("Hello, world", flags)
    assert flags == []


def test_space_in_format():
    # This is technically a violation: printf(3) allows a space in format
    # strings, but in the real world this leads to many false positives.
    flags = []
    check_c_format("This is 5% of everything", flags)
    assert flags == []


def test_basic_c_format():
    flags = []
    check_c_format("Hello, %s", flags)
    assert "c-format" in flags


def test_accept_no_format_hint():
    flags = ["no-c-format"]
    check_c_format("Hello, %s", flags)
    assert "c-format" not in flags


def test_escaped_percent_sign():
    flags = []
    check_c_format("100%%", flags)
    assert "c-format" not in flags


def test_strftime_is_not_c_format():
    flags = []
    check_c_format("%Y-%m-%d", flags)
    assert "c-format" not in flags


class TestKeywordFromSpec(object):
    def test_minimal(self):
        kw = Keyword.from_spec("gettext")
        assert kw.function == "gettext"
        assert kw.msgid_param == 1
        assert kw.msgid_plural_param is None

    def test_custom_msgid_param(self):
        kw = Keyword.from_spec("i18n_log:2")
        assert kw.function == "i18n_log"
        assert kw.msgid_param == 2
        assert kw.msgid_plural_param is None

    def test_plural(self):
        kw = Keyword.from_spec("ngettext:1,2")
        assert kw.function == "ngettext"
        assert kw.msgid_param == 1
        assert kw.msgid_plural_param == 2

    def test_domain_param(self):
        kw = Keyword.from_spec("dgettext:1d,2")
        assert kw.function == "dgettext"
        assert kw.msgid_param == 2
        assert kw.msgid_plural_param is None
        assert kw.domain_param == 1

    def test_parameter_count(self):
        kw = Keyword.from_spec("myfunc:1,5t")
        assert kw.function == "myfunc"
        assert kw.msgid_param == 1
        assert kw.msgid_plural_param is None
        assert kw.required_arguments == 5


def test_extractor():
    with pytest.raises(TypeError):
        Extractor()