import pytest

from urllib3.fields import guess_content_type, RequestField
from urllib3.packages.six import u
from . import onlyPy2


class TestRequestField(object):

    @pytest.mark.parametrize('filename, content_types', [
        ('image.jpg', ['image/jpeg', 'image/pjpeg']),
        ('notsure', ['application/octet-stream']),
        (None, ['application/octet-stream']),
    ])
    def test_guess_content_type(self, filename, content_types):
        assert guess_content_type(filename) in content_types

    def test_create(self):
        simple_field = RequestField('somename', 'data')
        assert simple_field.render_headers() == '\r\n'
        filename_field = RequestField('somename', 'data',
                                      filename='somefile.txt')
        assert filename_field.render_headers() == '\r\n'
        headers_field = RequestField('somename', 'data',
                                     headers={'Content-Length': 4})
        assert headers_field.render_headers() == 'Content-Length: 4\r\n\r\n'

    def test_make_multipart(self):
        field = RequestField('somename', 'data')
        field.make_multipart(content_type='image/jpg',
                             content_location='/test')
        assert (
            field.render_headers() ==
            'Content-Disposition: form-data; name="somename"\r\n'
            'Content-Type: image/jpg\r\n'
            'Content-Location: /test\r\n'
            '\r\n')

    def test_make_multipart_empty_filename(self):
        field = RequestField('somename', 'data', '')
        field.make_multipart(content_type='application/octet-stream')
        assert (
            field.render_headers() ==
            'Content-Disposition: form-data; name="somename"; filename=""\r\n'
            'Content-Type: application/octet-stream\r\n'
            '\r\n')

    def test_render_parts(self):
        field = RequestField('somename', 'data')
        parts = field._render_parts({'name': 'value', 'filename': 'value'})
        assert 'name="value"' in parts
        assert 'filename="value"' in parts
        parts = field._render_parts([('name', 'value'), ('filename', 'value')])
        assert parts == 'name="value"; filename="value"'

    def test_render_part(self):
        field = RequestField('somename', 'data')
        param = field._render_part('filename', u('n\u00e4me'))
        assert param == "filename*=utf-8''n%C3%A4me"

    @onlyPy2
    def test_render_unicode_bytes_py2(self):
        field = RequestField('somename', 'data')
        param = field._render_part('filename', 'n\xc3\xa4me')
        assert param == "filename*=utf-8''n%C3%A4me"