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247 lines
9.3 KiB
Python
247 lines
9.3 KiB
Python
# Copyright (C) 2004 Python Software Foundation
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# Author: barry@python.org (Barry Warsaw)
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# License: http://www.opensource.org/licenses/PythonSoftFoundation.php
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import unittest
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from string import Template
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class Bag:
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pass
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class Mapping:
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def __getitem__(self, name):
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obj = self
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for part in name.split('.'):
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try:
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obj = getattr(obj, part)
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except AttributeError:
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raise KeyError(name)
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return obj
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class TestTemplate(unittest.TestCase):
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def test_regular_templates(self):
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s = Template('$who likes to eat a bag of $what worth $$100')
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self.assertEqual(s.substitute(dict(who='tim', what='ham')),
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'tim likes to eat a bag of ham worth $100')
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self.assertRaises(KeyError, s.substitute, dict(who='tim'))
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def test_regular_templates_with_braces(self):
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s = Template('$who likes ${what} for ${meal}')
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d = dict(who='tim', what='ham', meal='dinner')
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self.assertEqual(s.substitute(d), 'tim likes ham for dinner')
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self.assertRaises(KeyError, s.substitute,
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dict(who='tim', what='ham'))
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def test_escapes(self):
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eq = self.assertEqual
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s = Template('$who likes to eat a bag of $$what worth $$100')
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eq(s.substitute(dict(who='tim', what='ham')),
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'tim likes to eat a bag of $what worth $100')
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s = Template('$who likes $$')
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eq(s.substitute(dict(who='tim', what='ham')), 'tim likes $')
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def test_percents(self):
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eq = self.assertEqual
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s = Template('%(foo)s $foo ${foo}')
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d = dict(foo='baz')
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eq(s.substitute(d), '%(foo)s baz baz')
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eq(s.safe_substitute(d), '%(foo)s baz baz')
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def test_stringification(self):
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eq = self.assertEqual
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s = Template('tim has eaten $count bags of ham today')
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d = dict(count=7)
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eq(s.substitute(d), 'tim has eaten 7 bags of ham today')
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eq(s.safe_substitute(d), 'tim has eaten 7 bags of ham today')
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s = Template('tim has eaten ${count} bags of ham today')
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eq(s.substitute(d), 'tim has eaten 7 bags of ham today')
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def test_tupleargs(self):
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eq = self.assertEqual
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s = Template('$who ate ${meal}')
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d = dict(who=('tim', 'fred'), meal=('ham', 'kung pao'))
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eq(s.substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')")
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eq(s.safe_substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')")
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def test_SafeTemplate(self):
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eq = self.assertEqual
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s = Template('$who likes ${what} for ${meal}')
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eq(s.safe_substitute(dict(who='tim')), 'tim likes ${what} for ${meal}')
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eq(s.safe_substitute(dict(what='ham')), '$who likes ham for ${meal}')
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eq(s.safe_substitute(dict(what='ham', meal='dinner')),
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'$who likes ham for dinner')
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eq(s.safe_substitute(dict(who='tim', what='ham')),
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'tim likes ham for ${meal}')
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eq(s.safe_substitute(dict(who='tim', what='ham', meal='dinner')),
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'tim likes ham for dinner')
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def test_invalid_placeholders(self):
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raises = self.assertRaises
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s = Template('$who likes $')
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raises(ValueError, s.substitute, dict(who='tim'))
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s = Template('$who likes ${what)')
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raises(ValueError, s.substitute, dict(who='tim'))
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s = Template('$who likes $100')
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raises(ValueError, s.substitute, dict(who='tim'))
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def test_idpattern_override(self):
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class PathPattern(Template):
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idpattern = r'[_a-z][._a-z0-9]*'
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m = Mapping()
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m.bag = Bag()
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m.bag.foo = Bag()
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m.bag.foo.who = 'tim'
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m.bag.what = 'ham'
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s = PathPattern('$bag.foo.who likes to eat a bag of $bag.what')
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self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham')
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def test_pattern_override(self):
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class MyPattern(Template):
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pattern = r"""
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(?P<escaped>@{2}) |
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@(?P<named>[_a-z][._a-z0-9]*) |
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@{(?P<braced>[_a-z][._a-z0-9]*)} |
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(?P<invalid>@)
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"""
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m = Mapping()
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m.bag = Bag()
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m.bag.foo = Bag()
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m.bag.foo.who = 'tim'
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m.bag.what = 'ham'
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s = MyPattern('@bag.foo.who likes to eat a bag of @bag.what')
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self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham')
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class BadPattern(Template):
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pattern = r"""
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(?P<badname>.*) |
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(?P<escaped>@{2}) |
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@(?P<named>[_a-z][._a-z0-9]*) |
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@{(?P<braced>[_a-z][._a-z0-9]*)} |
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(?P<invalid>@) |
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"""
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s = BadPattern('@bag.foo.who likes to eat a bag of @bag.what')
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self.assertRaises(ValueError, s.substitute, {})
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self.assertRaises(ValueError, s.safe_substitute, {})
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def test_braced_override(self):
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class MyTemplate(Template):
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pattern = r"""
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\$(?:
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(?P<escaped>$) |
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(?P<named>[_a-z][_a-z0-9]*) |
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@@(?P<braced>[_a-z][_a-z0-9]*)@@ |
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(?P<invalid>) |
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)
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"""
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tmpl = 'PyCon in $@@location@@'
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t = MyTemplate(tmpl)
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self.assertRaises(KeyError, t.substitute, {})
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val = t.substitute({'location': 'Cleveland'})
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self.assertEqual(val, 'PyCon in Cleveland')
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def test_braced_override_safe(self):
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class MyTemplate(Template):
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pattern = r"""
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\$(?:
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(?P<escaped>$) |
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(?P<named>[_a-z][_a-z0-9]*) |
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@@(?P<braced>[_a-z][_a-z0-9]*)@@ |
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(?P<invalid>) |
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)
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"""
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tmpl = 'PyCon in $@@location@@'
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t = MyTemplate(tmpl)
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self.assertEqual(t.safe_substitute(), tmpl)
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val = t.safe_substitute({'location': 'Cleveland'})
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self.assertEqual(val, 'PyCon in Cleveland')
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def test_invalid_with_no_lines(self):
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# The error formatting for invalid templates
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# has a special case for no data that the default
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# pattern can't trigger (always has at least '$')
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# So we craft a pattern that is always invalid
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# with no leading data.
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class MyTemplate(Template):
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pattern = r"""
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(?P<invalid>) |
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unreachable(
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(?P<named>) |
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(?P<braced>) |
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(?P<escaped>)
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)
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"""
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s = MyTemplate('')
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with self.assertRaises(ValueError) as err:
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s.substitute({})
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self.assertIn('line 1, col 1', str(err.exception))
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def test_unicode_values(self):
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s = Template('$who likes $what')
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d = dict(who='t\xffm', what='f\xfe\fed')
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self.assertEqual(s.substitute(d), 't\xffm likes f\xfe\x0ced')
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def test_keyword_arguments(self):
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eq = self.assertEqual
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s = Template('$who likes $what')
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eq(s.substitute(who='tim', what='ham'), 'tim likes ham')
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eq(s.substitute(dict(who='tim'), what='ham'), 'tim likes ham')
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eq(s.substitute(dict(who='fred', what='kung pao'),
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who='tim', what='ham'),
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'tim likes ham')
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s = Template('the mapping is $mapping')
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eq(s.substitute(dict(foo='none'), mapping='bozo'),
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'the mapping is bozo')
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eq(s.substitute(dict(mapping='one'), mapping='two'),
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'the mapping is two')
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def test_keyword_arguments_safe(self):
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eq = self.assertEqual
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raises = self.assertRaises
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s = Template('$who likes $what')
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eq(s.safe_substitute(who='tim', what='ham'), 'tim likes ham')
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eq(s.safe_substitute(dict(who='tim'), what='ham'), 'tim likes ham')
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eq(s.safe_substitute(dict(who='fred', what='kung pao'),
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who='tim', what='ham'),
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'tim likes ham')
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s = Template('the mapping is $mapping')
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eq(s.safe_substitute(dict(foo='none'), mapping='bozo'),
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'the mapping is bozo')
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eq(s.safe_substitute(dict(mapping='one'), mapping='two'),
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'the mapping is two')
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d = dict(mapping='one')
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raises(TypeError, s.substitute, d, {})
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raises(TypeError, s.safe_substitute, d, {})
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def test_delimiter_override(self):
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eq = self.assertEqual
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raises = self.assertRaises
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class AmpersandTemplate(Template):
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delimiter = '&'
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s = AmpersandTemplate('this &gift is for &{who} &&')
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eq(s.substitute(gift='bud', who='you'), 'this bud is for you &')
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raises(KeyError, s.substitute)
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eq(s.safe_substitute(gift='bud', who='you'), 'this bud is for you &')
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eq(s.safe_substitute(), 'this &gift is for &{who} &')
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s = AmpersandTemplate('this &gift is for &{who} &')
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raises(ValueError, s.substitute, dict(gift='bud', who='you'))
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eq(s.safe_substitute(), 'this &gift is for &{who} &')
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class PieDelims(Template):
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delimiter = '@'
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s = PieDelims('@who likes to eat a bag of @{what} worth $100')
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self.assertEqual(s.substitute(dict(who='tim', what='ham')),
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'tim likes to eat a bag of ham worth $100')
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def test_main():
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from test import support
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test_classes = [TestTemplate,]
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support.run_unittest(*test_classes)
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if __name__ == '__main__':
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test_main()
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