mirror of
https://github.com/django/django.git
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226 lines
11 KiB
Python
226 lines
11 KiB
Python
from django.template import Context, Engine
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from django.test import SimpleTestCase
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from ..utils import setup
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class IfChangedTagTests(SimpleTestCase):
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libraries = {'custom': 'template_tests.templatetags.custom'}
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@setup({'ifchanged01': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}'})
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def test_ifchanged01(self):
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output = self.engine.render_to_string('ifchanged01', {'num': (1, 2, 3)})
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self.assertEqual(output, '123')
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@setup({'ifchanged02': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}'})
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def test_ifchanged02(self):
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output = self.engine.render_to_string('ifchanged02', {'num': (1, 1, 3)})
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self.assertEqual(output, '13')
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@setup({'ifchanged03': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}{% endfor %}'})
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def test_ifchanged03(self):
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output = self.engine.render_to_string('ifchanged03', {'num': (1, 1, 1)})
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self.assertEqual(output, '1')
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@setup({'ifchanged04': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}'
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'{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged04(self):
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output = self.engine.render_to_string('ifchanged04', {'num': (1, 2, 3), 'numx': (2, 2, 2)})
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self.assertEqual(output, '122232')
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@setup({'ifchanged05': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}'
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'{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged05(self):
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output = self.engine.render_to_string('ifchanged05', {'num': (1, 1, 1), 'numx': (1, 2, 3)})
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self.assertEqual(output, '1123123123')
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@setup({'ifchanged06': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}'
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'{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged06(self):
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output = self.engine.render_to_string('ifchanged06', {'num': (1, 1, 1), 'numx': (2, 2, 2)})
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self.assertEqual(output, '1222')
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@setup({'ifchanged07': '{% for n in num %}{% ifchanged %}{{ n }}{% endifchanged %}'
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'{% for x in numx %}{% ifchanged %}{{ x }}{% endifchanged %}'
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'{% for y in numy %}{% ifchanged %}{{ y }}{% endifchanged %}'
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'{% endfor %}{% endfor %}{% endfor %}'})
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def test_ifchanged07(self):
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output = self.engine.render_to_string('ifchanged07', {'num': (1, 1, 1), 'numx': (2, 2, 2), 'numy': (3, 3, 3)})
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self.assertEqual(output, '1233323332333')
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@setup({'ifchanged08': '{% for data in datalist %}{% for c,d in data %}'
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'{% if c %}{% ifchanged %}{{ d }}{% endifchanged %}'
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'{% endif %}{% endfor %}{% endfor %}'})
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def test_ifchanged08(self):
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output = self.engine.render_to_string('ifchanged08', {'datalist': [
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[(1, 'a'), (1, 'a'), (0, 'b'), (1, 'c')],
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[(0, 'a'), (1, 'c'), (1, 'd'), (1, 'd'), (0, 'e')]
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]})
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self.assertEqual(output, 'accd')
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@setup({'ifchanged-param01': '{% for n in num %}{% ifchanged n %}..{% endifchanged %}'
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'{{ n }}{% endfor %}'})
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def test_ifchanged_param01(self):
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"""
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Test one parameter given to ifchanged.
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"""
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output = self.engine.render_to_string('ifchanged-param01', {'num': (1, 2, 3)})
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self.assertEqual(output, '..1..2..3')
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@setup({'ifchanged-param02': '{% for n in num %}{% for x in numx %}{% ifchanged n %}..{% endifchanged %}'
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'{{ x }}{% endfor %}{% endfor %}'})
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def test_ifchanged_param02(self):
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output = self.engine.render_to_string('ifchanged-param02', {'num': (1, 2, 3), 'numx': (5, 6, 7)})
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self.assertEqual(output, '..567..567..567')
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@setup({'ifchanged-param03': '{% for n in num %}{{ n }}{% for x in numx %}'
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'{% ifchanged x n %}{{ x }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged_param03(self):
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"""
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Test multiple parameters to ifchanged.
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"""
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output = self.engine.render_to_string('ifchanged-param03', {'num': (1, 1, 2), 'numx': (5, 6, 6)})
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self.assertEqual(output, '156156256')
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@setup({'ifchanged-param04': '{% for d in days %}{% ifchanged %}{{ d.day }}{% endifchanged %}'
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'{% for h in d.hours %}{% ifchanged d h %}{{ h }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged_param04(self):
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"""
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Test a date+hour like construct, where the hour of the last day is
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the same but the date had changed, so print the hour anyway.
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"""
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output = self.engine.render_to_string(
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'ifchanged-param04',
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{'days': [{'hours': [1, 2, 3], 'day': 1}, {'hours': [3], 'day': 2}]},
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)
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self.assertEqual(output, '112323')
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@setup({'ifchanged-param05': '{% for d in days %}{% ifchanged d.day %}{{ d.day }}{% endifchanged %}'
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'{% for h in d.hours %}{% ifchanged d.day h %}{{ h }}{% endifchanged %}'
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'{% endfor %}{% endfor %}'})
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def test_ifchanged_param05(self):
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"""
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Logically the same as above, just written with explicit ifchanged
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for the day.
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"""
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output = self.engine.render_to_string(
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'ifchanged-param05',
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{'days': [{'hours': [1, 2, 3], 'day': 1}, {'hours': [3], 'day': 2}]},
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)
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self.assertEqual(output, '112323')
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@setup({'ifchanged-else01': '{% for id in ids %}{{ id }}'
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'{% ifchanged id %}-first{% else %}-other{% endifchanged %}'
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',{% endfor %}'})
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def test_ifchanged_else01(self):
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"""
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Test the else clause of ifchanged.
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"""
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output = self.engine.render_to_string('ifchanged-else01', {'ids': [1, 1, 2, 2, 2, 3]})
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self.assertEqual(output, '1-first,1-other,2-first,2-other,2-other,3-first,')
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@setup({'ifchanged-else02': '{% for id in ids %}{{ id }}-'
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'{% ifchanged id %}{% cycle "red" "blue" %}{% else %}grey{% endifchanged %}'
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',{% endfor %}'})
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def test_ifchanged_else02(self):
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output = self.engine.render_to_string('ifchanged-else02', {'ids': [1, 1, 2, 2, 2, 3]})
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self.assertEqual(output, '1-red,1-grey,2-blue,2-grey,2-grey,3-red,')
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@setup({'ifchanged-else03': '{% for id in ids %}{{ id }}'
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'{% ifchanged id %}-{% cycle "red" "blue" %}{% else %}{% endifchanged %}'
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',{% endfor %}'})
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def test_ifchanged_else03(self):
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output = self.engine.render_to_string('ifchanged-else03', {'ids': [1, 1, 2, 2, 2, 3]})
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self.assertEqual(output, '1-red,1,2-blue,2,2,3-red,')
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@setup({'ifchanged-else04': '{% for id in ids %}'
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'{% ifchanged %}***{{ id }}*{% else %}...{% endifchanged %}'
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'{{ forloop.counter }}{% endfor %}'})
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def test_ifchanged_else04(self):
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output = self.engine.render_to_string('ifchanged-else04', {'ids': [1, 1, 2, 2, 2, 3, 4]})
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self.assertEqual(output, '***1*1...2***2*3...4...5***3*6***4*7')
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@setup({'ifchanged-filter-ws': '{% load custom %}{% for n in num %}'
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'{% ifchanged n|noop:"x y" %}..{% endifchanged %}{{ n }}'
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'{% endfor %}'})
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def test_ifchanged_filter_ws(self):
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"""
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Test whitespace in filter arguments
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"""
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output = self.engine.render_to_string('ifchanged-filter-ws', {'num': (1, 2, 3)})
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self.assertEqual(output, '..1..2..3')
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class IfChangedTests(SimpleTestCase):
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@classmethod
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def setUpClass(cls):
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cls.engine = Engine()
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super().setUpClass()
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def test_ifchanged_concurrency(self):
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"""
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#15849 -- ifchanged should be thread-safe.
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"""
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template = self.engine.from_string(
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'[0{% for x in foo %},{% with var=get_value %}{% ifchanged %}'
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'{{ var }}{% endifchanged %}{% endwith %}{% endfor %}]'
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)
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# Using generator to mimic concurrency.
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# The generator is not passed to the 'for' loop, because it does a list(values)
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# instead, call gen.next() in the template to control the generator.
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def gen():
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yield 1
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yield 2
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# Simulate that another thread is now rendering.
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# When the IfChangeNode stores state at 'self' it stays at '3' and skip the last yielded value below.
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iter2 = iter([1, 2, 3])
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output2 = template.render(Context({'foo': range(3), 'get_value': lambda: next(iter2)}))
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self.assertEqual(
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output2, '[0,1,2,3]', 'Expected [0,1,2,3] in second parallel template, got {}'.format(output2)
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)
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yield 3
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gen1 = gen()
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output1 = template.render(Context({'foo': range(3), 'get_value': lambda: next(gen1)}))
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self.assertEqual(output1, '[0,1,2,3]', 'Expected [0,1,2,3] in first template, got {}'.format(output1))
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def test_ifchanged_render_once(self):
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"""
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#19890. The content of ifchanged template tag was rendered twice.
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"""
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template = self.engine.from_string('{% ifchanged %}{% cycle "1st time" "2nd time" %}{% endifchanged %}')
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output = template.render(Context({}))
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self.assertEqual(output, '1st time')
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def test_include(self):
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"""
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#23516 -- This works as a regression test only if the cached loader
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isn't used. Hence we don't use the @setup decorator.
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"""
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engine = Engine(loaders=[
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('django.template.loaders.locmem.Loader', {
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'template': '{% for x in vars %}{% include "include" %}{% endfor %}',
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'include': '{% ifchanged %}{{ x }}{% endifchanged %}',
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}),
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])
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output = engine.render_to_string('template', {'vars': [1, 1, 2, 2, 3, 3]})
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self.assertEqual(output, "123")
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def test_include_state(self):
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"""Tests the node state for different IncludeNodes (#27974)."""
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engine = Engine(loaders=[
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('django.template.loaders.locmem.Loader', {
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'template': '{% for x in vars %}{% include "include" %}{% include "include" %}{% endfor %}',
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'include': '{% ifchanged %}{{ x }}{% endifchanged %}',
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}),
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])
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output = engine.render_to_string('template', {'vars': [1, 1, 2, 2, 3, 3]})
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self.assertEqual(output, '112233')
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