feat: add basic support for "view" part of CRUD

still no SQLAlchemy yet, view must be explicit about data/model.  but
should support simple dict records, which will be needed in a few
places anyway

tests/views/test_settings.py

@@ -2,6 +2,8 @@
 
 from tests.views.utils import WebTestCase
 
+from pyramid.httpexceptions import HTTPNotFound
+
 from wuttaweb.views import settings
 
 
@@ -43,3 +45,23 @@ class TestSettingView(WebTestCase):
         self.session.commit()
         data = view.index_get_grid_data(session=self.session)
         self.assertEqual(len(data), 1)
+
+    def test_get_instance(self):
+        view = self.make_view()
+        self.request.matchdict = {'name': 'foo'}
+
+        # setting not found
+        setting = view.get_instance(session=self.session)
+        self.assertIsInstance(setting, HTTPNotFound)
+
+        # setting is returned
+        self.app.save_setting(self.session, 'foo', 'bar')
+        self.session.commit()
+        setting = view.get_instance(session=self.session)
+        self.assertEqual(setting, {'name': 'foo', 'value': 'bar'})
+
+    def test_get_instance_title(self):
+        setting = {'name': 'foo', 'value': 'bar'}
+        view = self.make_view()
+        title = view.get_instance_title(setting)
+        self.assertEqual(title, 'foo')