import unittest

from zope.component.testing import PlacelessSetup

class Base(PlacelessSetup):
    def setUp(self):
        PlacelessSetup.setUp(self)

    def tearDown(self):
        PlacelessSetup.tearDown(self)

    def _zcmlConfigure(self):
        import repoze.bfg
        import zope.configuration.xmlconfig
        zope.configuration.xmlconfig.file('configure.zcml', package=repoze.bfg)

    def _getTemplatePath(self, name):
        import os
        here = os.path.abspath(os.path.dirname(__file__))
        return os.path.join(here, 'fixtures', name)

class ViewTests(unittest.TestCase):
    def _getTargetClass(self):
        from repoze.bfg.view import View
        return View

    def _makeOne(self, *arg, **kw):
        klass = self._getTargetClass()
        return klass(*arg, **kw)

    def test_call(self):
        view = self._makeOne(None, None)
        self.assertRaises(NotImplementedError, view)

class TemplateViewTests(unittest.TestCase, Base):
    def setUp(self):
        Base.setUp(self)

    def tearDown(self):
        Base.tearDown(self)

    def _getTargetClass(self):
        from repoze.bfg.view import TemplateView
        return TemplateView

    def _makeOne(self, *arg, **kw):
        klass = self._getTargetClass()
        return klass(*arg, **kw)

    def test_call(self):
        self._zcmlConfigure()
        view = self._makeOne(None, None)
        view.template = self._getTemplatePath('minimal.pt')
        result = view(foo='foo')
        from webob import Response
        self.failUnless(isinstance(result, Response))
        self.assertEqual(result.app_iter, ['<div>\n</div>'])
        self.assertEqual(result.status, '200 OK')
        self.assertEqual(len(result.headerlist), 2)
        
    def test_call_no_template(self):
        self._zcmlConfigure()
        view = self._makeOne(None, None)
        self.assertRaises(ValueError, view)