python-escpos/test/test_magicencode.py

#!/usr/bin/python
#  -*- coding: utf-8 -*-
"""tests for the magic encode module

:author: `Patrick Kanzler <patrick.kanzler@fablab.fau.de>`_
:organization: `python-escpos <https://github.com/python-escpos>`_
:copyright: Copyright (c) 2016 `python-escpos <https://github.com/python-escpos>`_
:license: GNU GPL v3
"""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import pytest
from nose.tools import raises, assert_raises
from hypothesis import given, example
import hypothesis.strategies as st
from escpos.magicencode import MagicEncode, Encoder
from escpos.katakana import encode_katakana
from escpos.exceptions import CharCodeError, Error


class TestEncoder:
    """
    Tests the single encoders.
    """

    def test_can_encode(self):
        assert not Encoder({'CP437': 1}).can_encode('CP437', u'€')
        assert Encoder({'CP437': 1}).can_encode('CP437', u'á')
        assert not Encoder({'foobar': 1}).can_encode('foobar', 'a')

    def test_find_suitable_encoding(self):
        assert not Encoder({'CP437': 1}).find_suitable_encoding(u'€')
        assert Encoder({'CP858': 1}).find_suitable_encoding(u'€') == 'CP858'

    @raises(ValueError)
    def test_get_encoding(self):
        Encoder({}).get_encoding_name('latin1')


class TestMagicEncode:
    """
    Tests the magic encode functionality.
    """

    class TestInit:
        """
        Test initialization.
        """

        def test_disabled_requires_encoding(self, driver):
            """
            Test that disabled without encoder raises an error.

            :param driver:
            """
            with pytest.raises(Error):
                MagicEncode(driver, disabled=True)

    class TestWriteWithEncoding:

        def test_init_from_none(self, driver):
            encode = MagicEncode(driver, encoding=None)
            encode.write_with_encoding('CP858', '€ ist teuro.')
            assert driver.output == b'\x1bt\x13\xd5 ist teuro.'

        def test_change_from_another(self, driver):
            encode = MagicEncode(driver, encoding='CP437')
            encode.write_with_encoding('CP858', '€ ist teuro.')
            assert driver.output == b'\x1bt\x13\xd5 ist teuro.'

        def test_no_change(self, driver):
            encode = MagicEncode(driver, encoding='CP858')
            encode.write_with_encoding('CP858', '€ ist teuro.')
            assert driver.output == b'\xd5 ist teuro.'

    class TestWrite:

        def test_write(self, driver):
            encode = MagicEncode(driver)
            encode.write('€ ist teuro.')
            assert driver.output == b'\x1bt\x0f\xa4 ist teuro.'

        def test_write_disabled(self, driver):
            encode = MagicEncode(driver, encoding='CP437', disabled=True)
            encode.write('€ ist teuro.')
            assert driver.output == b'? ist teuro.'

        def test_write_no_codepage(self, driver):
            encode = MagicEncode(
                driver, defaultsymbol="_", encoder=Encoder({'CP437': 1}),
                encoding='CP437')
            encode.write(u'€ ist teuro.')
            assert driver.output == b'_ ist teuro.'

    class TestForceEncoding:

        def test(self, driver):
            encode = MagicEncode(driver)
            encode.force_encoding('CP437')
            assert driver.output == b'\x1bt\x00'

            encode.write('€ ist teuro.')
            assert driver.output == b'\x1bt\x00? ist teuro.'


try:
    import jaconv
except ImportError:
    jaconv = None


@pytest.mark.skipif(not jaconv, reason="jaconv not installed")
class TestKatakana:
    @given(st.text())
    @example("カタカナ")
    @example("あいうえお")
    @example("ﾊﾝｶｸｶﾀｶﾅ")
    def test_accept(self, text):
        encode_katakana(text)

    def test_result(self):
        assert encode_katakana('カタカナ') == b'\xb6\xc0\xb6\xc5'
        assert encode_katakana("あいうえお") == b'\xb1\xb2\xb3\xb4\xb5'