"""
Tests for content parsing, and form-overloaded content parsing.
"""
from django.test import TestCase
from djangorestframework.compat import RequestFactory
from djangorestframework.mixins import RequestMixin
from djangorestframework.parsers import FormParser, MultiPartParser, PlainTextParser


class TestContentParsing(TestCase):
    def setUp(self):
        self.req = RequestFactory()

    def ensure_determines_no_content_GET(self, view):
        """Ensure view.RAW_CONTENT returns None for GET request with no content."""
        view.request = self.req.get('/')
        self.assertEqual(view.DATA, None)

    def ensure_determines_form_content_POST(self, view):
        """Ensure view.RAW_CONTENT returns content for POST request with form content."""
        form_data = {'qwerty': 'uiop'}
        view.parsers = (FormParser, MultiPartParser)
        view.request = self.req.post('/', data=form_data)
        self.assertEqual(view.DATA, form_data)

    def ensure_determines_non_form_content_POST(self, view):
        """Ensure view.RAW_CONTENT returns content for POST request with non-form content."""
        content = 'qwerty'
        content_type = 'text/plain'
        view.parsers = (PlainTextParser,)
        view.request = self.req.post('/', content, content_type=content_type)
        self.assertEqual(view.DATA, content)

    def ensure_determines_form_content_PUT(self, view):
        """Ensure view.RAW_CONTENT returns content for PUT request with form content."""
        form_data = {'qwerty': 'uiop'}
        view.parsers = (FormParser, MultiPartParser)
        view.request = self.req.put('/', data=form_data)
        self.assertEqual(view.DATA, form_data)

    def ensure_determines_non_form_content_PUT(self, view):
        """Ensure view.RAW_CONTENT returns content for PUT request with non-form content."""
        content = 'qwerty'
        content_type = 'text/plain'
        view.parsers = (PlainTextParser,)
        view.request = self.req.post('/', content, content_type=content_type)
        self.assertEqual(view.DATA, content)

    def test_standard_behaviour_determines_no_content_GET(self):
        """Ensure view.DATA returns None for GET request with no content."""
        self.ensure_determines_no_content_GET(RequestMixin())

    def test_standard_behaviour_determines_form_content_POST(self):
        """Ensure view.DATA returns content for POST request with form content."""
        self.ensure_determines_form_content_POST(RequestMixin())

    def test_standard_behaviour_determines_non_form_content_POST(self):
        """Ensure view.DATA returns content for POST request with non-form content."""
        self.ensure_determines_non_form_content_POST(RequestMixin())

    def test_standard_behaviour_determines_form_content_PUT(self):
        """Ensure view.DATA returns content for PUT request with form content."""
        self.ensure_determines_form_content_PUT(RequestMixin())

    def test_standard_behaviour_determines_non_form_content_PUT(self):
        """Ensure view.DATA returns content for PUT request with non-form content."""
        self.ensure_determines_non_form_content_PUT(RequestMixin())

    def test_overloaded_behaviour_allows_content_tunnelling(self):
        """Ensure request.DATA returns content for overloaded POST request"""
        content = 'qwerty'
        content_type = 'text/plain'
        view = RequestMixin()
        form_data = {view._CONTENT_PARAM: content,
                     view._CONTENTTYPE_PARAM: content_type}
        view.request = self.req.post('/', form_data)
        view.parsers = (PlainTextParser,)
        view._perform_form_overloading()
        self.assertEqual(view.DATA, content)