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/Lib/test/test_pep292.py

http://unladen-swallow.googlecode.com/
Python | 194 lines | 175 code | 16 blank | 3 comment | 2 complexity | c8de0771805701f31464f813d83c27cc MD5 | raw file
  1# Copyright (C) 2004 Python Software Foundation
  2# Author: barry@python.org (Barry Warsaw)
  3# License: http://www.opensource.org/licenses/PythonSoftFoundation.php
  4
  5import unittest
  6from string import Template
  7
  8
  9class Bag:
 10    pass
 11
 12class Mapping:
 13    def __getitem__(self, name):
 14        obj = self
 15        for part in name.split('.'):
 16            try:
 17                obj = getattr(obj, part)
 18            except AttributeError:
 19                raise KeyError(name)
 20        return obj
 21
 22
 23class TestTemplate(unittest.TestCase):
 24    def test_regular_templates(self):
 25        s = Template('$who likes to eat a bag of $what worth $$100')
 26        self.assertEqual(s.substitute(dict(who='tim', what='ham')),
 27                         'tim likes to eat a bag of ham worth $100')
 28        self.assertRaises(KeyError, s.substitute, dict(who='tim'))
 29
 30    def test_regular_templates_with_braces(self):
 31        s = Template('$who likes ${what} for ${meal}')
 32        d = dict(who='tim', what='ham', meal='dinner')
 33        self.assertEqual(s.substitute(d), 'tim likes ham for dinner')
 34        self.assertRaises(KeyError, s.substitute,
 35                          dict(who='tim', what='ham'))
 36
 37    def test_escapes(self):
 38        eq = self.assertEqual
 39        s = Template('$who likes to eat a bag of $$what worth $$100')
 40        eq(s.substitute(dict(who='tim', what='ham')),
 41           'tim likes to eat a bag of $what worth $100')
 42        s = Template('$who likes $$')
 43        eq(s.substitute(dict(who='tim', what='ham')), 'tim likes $')
 44
 45    def test_percents(self):
 46        eq = self.assertEqual
 47        s = Template('%(foo)s $foo ${foo}')
 48        d = dict(foo='baz')
 49        eq(s.substitute(d), '%(foo)s baz baz')
 50        eq(s.safe_substitute(d), '%(foo)s baz baz')
 51
 52    def test_stringification(self):
 53        eq = self.assertEqual
 54        s = Template('tim has eaten $count bags of ham today')
 55        d = dict(count=7)
 56        eq(s.substitute(d), 'tim has eaten 7 bags of ham today')
 57        eq(s.safe_substitute(d), 'tim has eaten 7 bags of ham today')
 58        s = Template('tim has eaten ${count} bags of ham today')
 59        eq(s.substitute(d), 'tim has eaten 7 bags of ham today')
 60
 61    def test_tupleargs(self):
 62        eq = self.assertEqual
 63        s = Template('$who ate ${meal}')
 64        d = dict(who=('tim', 'fred'), meal=('ham', 'kung pao'))
 65        eq(s.substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')")
 66        eq(s.safe_substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')")
 67
 68    def test_SafeTemplate(self):
 69        eq = self.assertEqual
 70        s = Template('$who likes ${what} for ${meal}')
 71        eq(s.safe_substitute(dict(who='tim')), 'tim likes ${what} for ${meal}')
 72        eq(s.safe_substitute(dict(what='ham')), '$who likes ham for ${meal}')
 73        eq(s.safe_substitute(dict(what='ham', meal='dinner')),
 74           '$who likes ham for dinner')
 75        eq(s.safe_substitute(dict(who='tim', what='ham')),
 76           'tim likes ham for ${meal}')
 77        eq(s.safe_substitute(dict(who='tim', what='ham', meal='dinner')),
 78           'tim likes ham for dinner')
 79
 80    def test_invalid_placeholders(self):
 81        raises = self.assertRaises
 82        s = Template('$who likes $')
 83        raises(ValueError, s.substitute, dict(who='tim'))
 84        s = Template('$who likes ${what)')
 85        raises(ValueError, s.substitute, dict(who='tim'))
 86        s = Template('$who likes $100')
 87        raises(ValueError, s.substitute, dict(who='tim'))
 88
 89    def test_delimiter_override(self):
 90        class PieDelims(Template):
 91            delimiter = '@'
 92        s = PieDelims('@who likes to eat a bag of @{what} worth $100')
 93        self.assertEqual(s.substitute(dict(who='tim', what='ham')),
 94                         'tim likes to eat a bag of ham worth $100')
 95
 96    def test_idpattern_override(self):
 97        class PathPattern(Template):
 98            idpattern = r'[_a-z][._a-z0-9]*'
 99        m = Mapping()
100        m.bag = Bag()
101        m.bag.foo = Bag()
102        m.bag.foo.who = 'tim'
103        m.bag.what = 'ham'
104        s = PathPattern('$bag.foo.who likes to eat a bag of $bag.what')
105        self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham')
106
107    def test_pattern_override(self):
108        class MyPattern(Template):
109            pattern = r"""
110            (?P<escaped>@{2})                   |
111            @(?P<named>[_a-z][._a-z0-9]*)       |
112            @{(?P<braced>[_a-z][._a-z0-9]*)}    |
113            (?P<invalid>@)
114            """
115        m = Mapping()
116        m.bag = Bag()
117        m.bag.foo = Bag()
118        m.bag.foo.who = 'tim'
119        m.bag.what = 'ham'
120        s = MyPattern('@bag.foo.who likes to eat a bag of @bag.what')
121        self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham')
122
123        class BadPattern(Template):
124            pattern = r"""
125            (?P<badname>.*)                     |
126            (?P<escaped>@{2})                   |
127            @(?P<named>[_a-z][._a-z0-9]*)       |
128            @{(?P<braced>[_a-z][._a-z0-9]*)}    |
129            (?P<invalid>@)                      |
130            """
131        s = BadPattern('@bag.foo.who likes to eat a bag of @bag.what')
132        self.assertRaises(ValueError, s.substitute, {})
133        self.assertRaises(ValueError, s.safe_substitute, {})
134
135    def test_unicode_values(self):
136        s = Template('$who likes $what')
137        d = dict(who=u't\xffm', what=u'f\xfe\fed')
138        self.assertEqual(s.substitute(d), u't\xffm likes f\xfe\x0ced')
139
140    def test_keyword_arguments(self):
141        eq = self.assertEqual
142        s = Template('$who likes $what')
143        eq(s.substitute(who='tim', what='ham'), 'tim likes ham')
144        eq(s.substitute(dict(who='tim'), what='ham'), 'tim likes ham')
145        eq(s.substitute(dict(who='fred', what='kung pao'),
146                        who='tim', what='ham'),
147           'tim likes ham')
148        s = Template('the mapping is $mapping')
149        eq(s.substitute(dict(foo='none'), mapping='bozo'),
150           'the mapping is bozo')
151        eq(s.substitute(dict(mapping='one'), mapping='two'),
152           'the mapping is two')
153
154    def test_keyword_arguments_safe(self):
155        eq = self.assertEqual
156        raises = self.assertRaises
157        s = Template('$who likes $what')
158        eq(s.safe_substitute(who='tim', what='ham'), 'tim likes ham')
159        eq(s.safe_substitute(dict(who='tim'), what='ham'), 'tim likes ham')
160        eq(s.safe_substitute(dict(who='fred', what='kung pao'),
161                        who='tim', what='ham'),
162           'tim likes ham')
163        s = Template('the mapping is $mapping')
164        eq(s.safe_substitute(dict(foo='none'), mapping='bozo'),
165           'the mapping is bozo')
166        eq(s.safe_substitute(dict(mapping='one'), mapping='two'),
167           'the mapping is two')
168        d = dict(mapping='one')
169        raises(TypeError, s.substitute, d, {})
170        raises(TypeError, s.safe_substitute, d, {})
171
172    def test_delimiter_override(self):
173        eq = self.assertEqual
174        raises = self.assertRaises
175        class AmpersandTemplate(Template):
176            delimiter = '&'
177        s = AmpersandTemplate('this &gift is for &{who} &&')
178        eq(s.substitute(gift='bud', who='you'), 'this bud is for you &')
179        raises(KeyError, s.substitute)
180        eq(s.safe_substitute(gift='bud', who='you'), 'this bud is for you &')
181        eq(s.safe_substitute(), 'this &gift is for &{who} &')
182        s = AmpersandTemplate('this &gift is for &{who} &')
183        raises(ValueError, s.substitute, dict(gift='bud', who='you'))
184        eq(s.safe_substitute(), 'this &gift is for &{who} &')
185
186
187def test_main():
188    from test import test_support
189    test_classes = [TestTemplate,]
190    test_support.run_unittest(*test_classes)
191
192
193if __name__ == '__main__':
194    test_main()