feat: add initial/basic pagination for grids

so far this is only for client-side pagination; which means *all* grid
data is dumped to JSON for Vue access.  backend pagination coming soon

tests/grids/test_base.py

@@ -8,24 +8,10 @@ from pyramid import testing
 from wuttjamaican.conf import WuttaConfig
 from wuttaweb.grids import base
 from wuttaweb.forms import FieldList
+from tests.util import WebTestCase
 
 
-class TestGrid(TestCase):
-
-    def setUp(self):
-        self.config = WuttaConfig(defaults={
-            'wutta.web.menus.handler_spec': 'tests.util:NullMenuHandler',
-        })
-        self.app = self.config.get_app()
-
-        self.request = testing.DummyRequest(wutta_config=self.config, use_oruga=False)
-
-        self.pyramid_config = testing.setUp(request=self.request, settings={
-            'mako.directories': ['wuttaweb:templates'],
-        })
-
-    def tearDown(self):
-        testing.tearDown()
+class TestGrid(WebTestCase):
 
     def make_grid(self, request=None, **kwargs):
         return base.Grid(request or self.request, **kwargs)
@@ -144,6 +130,44 @@ class TestGrid(TestCase):
         self.assertFalse(grid.is_linked('foo'))
         self.assertTrue(grid.is_linked('bar'))
 
+    def test_get_pagesize_options(self):
+        grid = self.make_grid()
+
+        # default
+        options = grid.get_pagesize_options()
+        self.assertEqual(options, [5, 10, 20, 50, 100, 200])
+
+        # override default
+        options = grid.get_pagesize_options(default=[42])
+        self.assertEqual(options, [42])
+
+        # from config
+        self.config.setdefault('wuttaweb.grids.default_pagesize_options', '1 2 3')
+        options = grid.get_pagesize_options()
+        self.assertEqual(options, [1, 2, 3])
+
+    def test_get_pagesize(self):
+        grid = self.make_grid()
+
+        # default
+        size = grid.get_pagesize()
+        self.assertEqual(size, 20)
+
+        # override default
+        size = grid.get_pagesize(default=42)
+        self.assertEqual(size, 42)
+
+        # override default options
+        self.config.setdefault('wuttaweb.grids.default_pagesize_options', '10 15 30')
+        grid = self.make_grid()
+        size = grid.get_pagesize()
+        self.assertEqual(size, 10)
+
+        # from config
+        self.config.setdefault('wuttaweb.grids.default_pagesize', '15')
+        size = grid.get_pagesize()
+        self.assertEqual(size, 15)
+
     def test_render_vue_tag(self):
         grid = self.make_grid(columns=['foo', 'bar'])
         html = grid.render_vue_tag()