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+# -*- coding: utf-8 -*-
+"""
+ jinja2.testsuite.api
+ ~~~~~~~~~~~~~~~~~~~~
+
+ Tests the public API and related stuff.
+
+ :copyright: (c) 2010 by the Jinja Team.
+ :license: BSD, see LICENSE for more details.
+"""
+import unittest
+
+from jinja2.testsuite import JinjaTestCase
+
+from jinja2 import Environment, Undefined, DebugUndefined, \
+ StrictUndefined, UndefinedError, meta, \
+ is_undefined, Template, DictLoader
+from jinja2.utils import Cycler
+
+env = Environment()
+
+
+class ExtendedAPITestCase(JinjaTestCase):
+
+ def test_item_and_attribute(self):
+ from jinja2.sandbox import SandboxedEnvironment
+
+ for env in Environment(), SandboxedEnvironment():
+ # the |list is necessary for python3
+ tmpl = env.from_string('{{ foo.items()|list }}')
+ assert tmpl.render(foo={'items': 42}) == "[('items', 42)]"
+ tmpl = env.from_string('{{ foo|attr("items")()|list }}')
+ assert tmpl.render(foo={'items': 42}) == "[('items', 42)]"
+ tmpl = env.from_string('{{ foo["items"] }}')
+ assert tmpl.render(foo={'items': 42}) == '42'
+
+ def test_finalizer(self):
+ def finalize_none_empty(value):
+ if value is None:
+ value = u''
+ return value
+ env = Environment(finalize=finalize_none_empty)
+ tmpl = env.from_string('{% for item in seq %}|{{ item }}{% endfor %}')
+ assert tmpl.render(seq=(None, 1, "foo")) == '||1|foo'
+ tmpl = env.from_string('<{{ none }}>')
+ assert tmpl.render() == '<>'
+
+ def test_cycler(self):
+ items = 1, 2, 3
+ c = Cycler(*items)
+ for item in items + items:
+ assert c.current == item
+ assert c.next() == item
+ c.next()
+ assert c.current == 2
+ c.reset()
+ assert c.current == 1
+
+ def test_expressions(self):
+ expr = env.compile_expression("foo")
+ assert expr() is None
+ assert expr(foo=42) == 42
+ expr2 = env.compile_expression("foo", undefined_to_none=False)
+ assert is_undefined(expr2())
+
+ expr = env.compile_expression("42 + foo")
+ assert expr(foo=42) == 84
+
+ def test_template_passthrough(self):
+ t = Template('Content')
+ assert env.get_template(t) is t
+ assert env.select_template([t]) is t
+ assert env.get_or_select_template([t]) is t
+ assert env.get_or_select_template(t) is t
+
+ def test_autoescape_autoselect(self):
+ def select_autoescape(name):
+ if name is None or '.' not in name:
+ return False
+ return name.endswith('.html')
+ env = Environment(autoescape=select_autoescape,
+ loader=DictLoader({
+ 'test.txt': '{{ foo }}',
+ 'test.html': '{{ foo }}'
+ }))
+ t = env.get_template('test.txt')
+ assert t.render(foo='<foo>') == '<foo>'
+ t = env.get_template('test.html')
+ assert t.render(foo='<foo>') == '&lt;foo&gt;'
+ t = env.from_string('{{ foo }}')
+ assert t.render(foo='<foo>') == '<foo>'
+
+
+class MetaTestCase(JinjaTestCase):
+
+ def test_find_undeclared_variables(self):
+ ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
+ x = meta.find_undeclared_variables(ast)
+ assert x == set(['bar'])
+
+ ast = env.parse('{% set foo = 42 %}{{ bar + foo }}'
+ '{% macro meh(x) %}{{ x }}{% endmacro %}'
+ '{% for item in seq %}{{ muh(item) + meh(seq) }}{% endfor %}')
+ x = meta.find_undeclared_variables(ast)
+ assert x == set(['bar', 'seq', 'muh'])
+
+ def test_find_refererenced_templates(self):
+ ast = env.parse('{% extends "layout.html" %}{% include helper %}')
+ i = meta.find_referenced_templates(ast)
+ assert i.next() == 'layout.html'
+ assert i.next() is None
+ assert list(i) == []
+
+ ast = env.parse('{% extends "layout.html" %}'
+ '{% from "test.html" import a, b as c %}'
+ '{% import "meh.html" as meh %}'
+ '{% include "muh.html" %}')
+ i = meta.find_referenced_templates(ast)
+ assert list(i) == ['layout.html', 'test.html', 'meh.html', 'muh.html']
+
+ def test_find_included_templates(self):
+ ast = env.parse('{% include ["foo.html", "bar.html"] %}')
+ i = meta.find_referenced_templates(ast)
+ assert list(i) == ['foo.html', 'bar.html']
+
+ ast = env.parse('{% include ("foo.html", "bar.html") %}')
+ i = meta.find_referenced_templates(ast)
+ assert list(i) == ['foo.html', 'bar.html']
+
+ ast = env.parse('{% include ["foo.html", "bar.html", foo] %}')
+ i = meta.find_referenced_templates(ast)
+ assert list(i) == ['foo.html', 'bar.html', None]
+
+ ast = env.parse('{% include ("foo.html", "bar.html", foo) %}')
+ i = meta.find_referenced_templates(ast)
+ assert list(i) == ['foo.html', 'bar.html', None]
+
+
+class StreamingTestCase(JinjaTestCase):
+
+ def test_basic_streaming(self):
+ tmpl = env.from_string("<ul>{% for item in seq %}<li>{{ loop.index "
+ "}} - {{ item }}</li>{%- endfor %}</ul>")
+ stream = tmpl.stream(seq=range(4))
+ self.assert_equal(stream.next(), '<ul>')
+ self.assert_equal(stream.next(), '<li>1 - 0</li>')
+ self.assert_equal(stream.next(), '<li>2 - 1</li>')
+ self.assert_equal(stream.next(), '<li>3 - 2</li>')
+ self.assert_equal(stream.next(), '<li>4 - 3</li>')
+ self.assert_equal(stream.next(), '</ul>')
+
+ def test_buffered_streaming(self):
+ tmpl = env.from_string("<ul>{% for item in seq %}<li>{{ loop.index "
+ "}} - {{ item }}</li>{%- endfor %}</ul>")
+ stream = tmpl.stream(seq=range(4))
+ stream.enable_buffering(size=3)
+ self.assert_equal(stream.next(), u'<ul><li>1 - 0</li><li>2 - 1</li>')
+ self.assert_equal(stream.next(), u'<li>3 - 2</li><li>4 - 3</li></ul>')
+
+ def test_streaming_behavior(self):
+ tmpl = env.from_string("")
+ stream = tmpl.stream()
+ assert not stream.buffered
+ stream.enable_buffering(20)
+ assert stream.buffered
+ stream.disable_buffering()
+ assert not stream.buffered
+
+
+class UndefinedTestCase(JinjaTestCase):
+
+ def test_stopiteration_is_undefined(self):
+ def test():
+ raise StopIteration()
+ t = Template('A{{ test() }}B')
+ assert t.render(test=test) == 'AB'
+ t = Template('A{{ test().missingattribute }}B')
+ self.assert_raises(UndefinedError, t.render, test=test)
+
+ def test_undefined_and_special_attributes(self):
+ try:
+ Undefined('Foo').__dict__
+ except AttributeError:
+ pass
+ else:
+ assert False, "Expected actual attribute error"
+
+ def test_default_undefined(self):
+ env = Environment(undefined=Undefined)
+ self.assert_equal(env.from_string('{{ missing }}').render(), u'')
+ self.assert_raises(UndefinedError,
+ env.from_string('{{ missing.attribute }}').render)
+ self.assert_equal(env.from_string('{{ missing|list }}').render(), '[]')
+ self.assert_equal(env.from_string('{{ missing is not defined }}').render(), 'True')
+ self.assert_equal(env.from_string('{{ foo.missing }}').render(foo=42), '')
+ self.assert_equal(env.from_string('{{ not missing }}').render(), 'True')
+
+ def test_debug_undefined(self):
+ env = Environment(undefined=DebugUndefined)
+ self.assert_equal(env.from_string('{{ missing }}').render(), '{{ missing }}')
+ self.assert_raises(UndefinedError,
+ env.from_string('{{ missing.attribute }}').render)
+ self.assert_equal(env.from_string('{{ missing|list }}').render(), '[]')
+ self.assert_equal(env.from_string('{{ missing is not defined }}').render(), 'True')
+ self.assert_equal(env.from_string('{{ foo.missing }}').render(foo=42),
+ u"{{ no such element: int object['missing'] }}")
+ self.assert_equal(env.from_string('{{ not missing }}').render(), 'True')
+
+ def test_strict_undefined(self):
+ env = Environment(undefined=StrictUndefined)
+ self.assert_raises(UndefinedError, env.from_string('{{ missing }}').render)
+ self.assert_raises(UndefinedError, env.from_string('{{ missing.attribute }}').render)
+ self.assert_raises(UndefinedError, env.from_string('{{ missing|list }}').render)
+ self.assert_equal(env.from_string('{{ missing is not defined }}').render(), 'True')
+ self.assert_raises(UndefinedError, env.from_string('{{ foo.missing }}').render, foo=42)
+ self.assert_raises(UndefinedError, env.from_string('{{ not missing }}').render)
+
+ def test_indexing_gives_undefined(self):
+ t = Template("{{ var[42].foo }}")
+ self.assert_raises(UndefinedError, t.render, var=0)
+
+ def test_none_gives_proper_error(self):
+ try:
+ Environment().getattr(None, 'split')()
+ except UndefinedError, e:
+ assert e.message == "'None' has no attribute 'split'"
+ else:
+ assert False, 'expected exception'
+
+ def test_object_repr(self):
+ try:
+ Undefined(obj=42, name='upper')()
+ except UndefinedError, e:
+ assert e.message == "'int object' has no attribute 'upper'"
+ else:
+ assert False, 'expected exception'
+
+
+def suite():
+ suite = unittest.TestSuite()
+ suite.addTest(unittest.makeSuite(ExtendedAPITestCase))
+ suite.addTest(unittest.makeSuite(MetaTestCase))
+ suite.addTest(unittest.makeSuite(StreamingTestCase))
+ suite.addTest(unittest.makeSuite(UndefinedTestCase))
+ return suite
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