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import warnings
from django.test import TestCase
from django_tables2 import Table
from django_tables2.data import TableData, TableListData, TableQuerysetData
from .app.models import Person, PersonProxy, Region
from .utils import build_request
class TableDataFactoryTest(TestCase):
def test_invalid_data(self):
message = "data must be QuerySet-like (have count() and order_by()) or support list(data)"
class Klass:
pass
class Bad:
def __len__(self):
pass
invalid = [None, 1, Klass(), Bad()]
for data in invalid:
with self.subTest(data=data), self.assertRaisesMessage(ValueError, message):
TableData.from_data(data)
def test_valid_QuerySet(self):
data = TableData.from_data(Person.objects.all())
self.assertIsInstance(data, TableQuerysetData)
def test_valid_list_of_dicts(self):
data = TableData.from_data([{"name": "John"}, {"name": "Pete"}])
self.assertIsInstance(data, TableListData)
self.assertEqual(len(data), 2)
def test_valid_tuple_of_dicts(self):
data = TableData.from_data(({"name": "John"}, {"name": "Pete"}))
self.assertIsInstance(data, TableListData)
self.assertEqual(len(data), 2)
def test_valid_class(self):
class Datasource:
def __len__(self):
return 1
def __getitem__(self, pos):
if pos != 0:
raise IndexError()
return {"a": 1}
data = TableData.from_data(Datasource())
self.assertEqual(len(data), 1)
class TableDataTest(TestCase):
def test_knows_its_default_name(self):
data = TableData.from_data([{}])
self.assertEqual(data.verbose_name, "item")
self.assertEqual(data.verbose_name_plural, "items")
def test_knows_its_name(self):
data = TableData.from_data(Person.objects.all())
self.assertEqual(data.verbose_name, "person")
self.assertEqual(data.verbose_name_plural, "people")
def generator(max_value):
for i in range(max_value):
yield {"foo": i, "bar": chr(i), "baz": hex(i), "inv": max_value - i}
class TableListsDataTest(TestCase):
def test_TableListData_basic_list(self):
list_data = list(generator(100))
data = TableListData(list_data)
self.assertEqual(len(list_data), len(data))
self.assertEqual(data.verbose_name, "item")
self.assertEqual(data.verbose_name_plural, "items")
def test_TableListData_with_verbose_name(self):
"""TableListData uses the attributes on the list-like object to generate it's verbose_name."""
class listlike(list):
verbose_name = "unit"
verbose_name_plural = "units"
list_data = listlike(generator(100))
data = TableListData(list_data)
self.assertEqual(len(list_data), len(data))
self.assertEqual(data.verbose_name, "unit")
self.assertEqual(data.verbose_name_plural, "units")
class TableQuerysetDataTest(TestCase):
def test_custom_TableData(self):
"""If TableQuerysetData._length is set, no count() query will be performed."""
for i in range(11):
Person.objects.create(first_name=f"first {i}")
data = TableQuerysetData(Person.objects.all())
data._length = 10
table = Table(data=data)
self.assertEqual(len(table.data), 10)
def test_no_warning_model_identical(self):
class MyTable(Table):
class Meta:
model = Person
with warnings.catch_warnings(record=True) as w:
MyTable(Person.objects.all())
self.assertEqual(len(w), 0)
def test_warning_model_mismatch(self):
class MyTable(Table):
class Meta:
model = Person
with warnings.catch_warnings(record=True) as w:
MyTable(Region.objects.all())
self.assertEqual(len(w), 1)
def test_no_warning_model_subclass(self):
class MyTable(Table):
class Meta:
model = Person
with warnings.catch_warnings(record=True) as w:
MyTable(PersonProxy.objects.all())
self.assertEqual(len(w), 0)
def test_queryset_union(self):
for i in range(10):
Person.objects.create(first_name=f"first {i}", last_name="foo")
Person.objects.create(first_name=f"first {i * 2}", last_name="bar")
class MyTable(Table):
class Meta:
model = Person
fields = ("first_name",)
qs = Person.objects.filter(last_name="bar").union(Person.objects.filter(last_name="foo"))
table = MyTable(qs.order_by("-last_name"))
self.assertEqual(len(table.rows), 20)
html = table.as_html(build_request())
self.assertIn("first 18", html)
self.assertIn("first 10", html)
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