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//usr/lib/python2.4/test/test_pep292.py
# Copyright (C) 2004 Python Software Foundation # Author: barry@python.org (Barry Warsaw) # License: http://www.opensource.org/licenses/PythonSoftFoundation.php import unittest from string import Template class Bag: pass class Mapping: def __getitem__(self, name): obj = self for part in name.split('.'): try: obj = getattr(obj, part) except AttributeError: raise KeyError(name) return obj class TestTemplate(unittest.TestCase): def test_regular_templates(self): s = Template('$who likes to eat a bag of $what worth $$100') self.assertEqual(s.substitute(dict(who='tim', what='ham')), 'tim likes to eat a bag of ham worth $100') self.assertRaises(KeyError, s.substitute, dict(who='tim')) def test_regular_templates_with_braces(self): s = Template('$who likes ${what} for ${meal}') d = dict(who='tim', what='ham', meal='dinner') self.assertEqual(s.substitute(d), 'tim likes ham for dinner') self.assertRaises(KeyError, s.substitute, dict(who='tim', what='ham')) def test_escapes(self): eq = self.assertEqual s = Template('$who likes to eat a bag of $$what worth $$100') eq(s.substitute(dict(who='tim', what='ham')), 'tim likes to eat a bag of $what worth $100') s = Template('$who likes $$') eq(s.substitute(dict(who='tim', what='ham')), 'tim likes $') def test_percents(self): eq = self.assertEqual s = Template('%(foo)s $foo ${foo}') d = dict(foo='baz') eq(s.substitute(d), '%(foo)s baz baz') eq(s.safe_substitute(d), '%(foo)s baz baz') def test_stringification(self): eq = self.assertEqual s = Template('tim has eaten $count bags of ham today') d = dict(count=7) eq(s.substitute(d), 'tim has eaten 7 bags of ham today') eq(s.safe_substitute(d), 'tim has eaten 7 bags of ham today') s = Template('tim has eaten ${count} bags of ham today') eq(s.substitute(d), 'tim has eaten 7 bags of ham today') def test_SafeTemplate(self): eq = self.assertEqual s = Template('$who likes ${what} for ${meal}') eq(s.safe_substitute(dict(who='tim')), 'tim likes ${what} for ${meal}') eq(s.safe_substitute(dict(what='ham')), '$who likes ham for ${meal}') eq(s.safe_substitute(dict(what='ham', meal='dinner')), '$who likes ham for dinner') eq(s.safe_substitute(dict(who='tim', what='ham')), 'tim likes ham for ${meal}') eq(s.safe_substitute(dict(who='tim', what='ham', meal='dinner')), 'tim likes ham for dinner') def test_invalid_placeholders(self): raises = self.assertRaises s = Template('$who likes $') raises(ValueError, s.substitute, dict(who='tim')) s = Template('$who likes ${what)') raises(ValueError, s.substitute, dict(who='tim')) s = Template('$who likes $100') raises(ValueError, s.substitute, dict(who='tim')) def test_delimiter_override(self): class PieDelims(Template): delimiter = '@' s = PieDelims('@who likes to eat a bag of @{what} worth $100') self.assertEqual(s.substitute(dict(who='tim', what='ham')), 'tim likes to eat a bag of ham worth $100') def test_idpattern_override(self): class PathPattern(Template): idpattern = r'[_a-z][._a-z0-9]*' m = Mapping() m.bag = Bag() m.bag.foo = Bag() m.bag.foo.who = 'tim' m.bag.what = 'ham' s = PathPattern('$bag.foo.who likes to eat a bag of $bag.what') self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham') def test_pattern_override(self): class MyPattern(Template): pattern = r""" (?P<escaped>@{2}) | @(?P<named>[_a-z][._a-z0-9]*) | @{(?P<braced>[_a-z][._a-z0-9]*)} | (?P<invalid>@) """ m = Mapping() m.bag = Bag() m.bag.foo = Bag() m.bag.foo.who = 'tim' m.bag.what = 'ham' s = MyPattern('@bag.foo.who likes to eat a bag of @bag.what') self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham') class BadPattern(Template): pattern = r""" (?P<badname>.*) | (?P<escaped>@{2}) | @(?P<named>[_a-z][._a-z0-9]*) | @{(?P<braced>[_a-z][._a-z0-9]*)} | (?P<invalid>@) | """ s = BadPattern('@bag.foo.who likes to eat a bag of @bag.what') self.assertRaises(ValueError, s.substitute, {}) self.assertRaises(ValueError, s.safe_substitute, {}) def test_unicode_values(self): s = Template('$who likes $what') d = dict(who=u't\xffm', what=u'f\xfe\fed') self.assertEqual(s.substitute(d), u't\xffm likes f\xfe\x0ced') def test_keyword_arguments(self): eq = self.assertEqual s = Template('$who likes $what') eq(s.substitute(who='tim', what='ham'), 'tim likes ham') eq(s.substitute(dict(who='tim'), what='ham'), 'tim likes ham') eq(s.substitute(dict(who='fred', what='kung pao'), who='tim', what='ham'), 'tim likes ham') s = Template('the mapping is $mapping') eq(s.substitute(dict(foo='none'), mapping='bozo'), 'the mapping is bozo') eq(s.substitute(dict(mapping='one'), mapping='two'), 'the mapping is two') def test_keyword_arguments_safe(self): eq = self.assertEqual raises = self.assertRaises s = Template('$who likes $what') eq(s.safe_substitute(who='tim', what='ham'), 'tim likes ham') eq(s.safe_substitute(dict(who='tim'), what='ham'), 'tim likes ham') eq(s.safe_substitute(dict(who='fred', what='kung pao'), who='tim', what='ham'), 'tim likes ham') s = Template('the mapping is $mapping') eq(s.safe_substitute(dict(foo='none'), mapping='bozo'), 'the mapping is bozo') eq(s.safe_substitute(dict(mapping='one'), mapping='two'), 'the mapping is two') d = dict(mapping='one') raises(TypeError, s.substitute, d, {}) raises(TypeError, s.safe_substitute, d, {}) def test_delimiter_override(self): eq = self.assertEqual raises = self.assertRaises class AmpersandTemplate(Template): delimiter = '&' s = AmpersandTemplate('this &gift is for &{who} &&') eq(s.substitute(gift='bud', who='you'), 'this bud is for you &') raises(KeyError, s.substitute) eq(s.safe_substitute(gift='bud', who='you'), 'this bud is for you &') eq(s.safe_substitute(), 'this &gift is for &{who} &') s = AmpersandTemplate('this &gift is for &{who} &') raises(ValueError, s.substitute, dict(gift='bud', who='you')) eq(s.safe_substitute(), 'this &gift is for &{who} &') def test_main(): from test import test_support test_classes = [TestTemplate,] test_support.run_unittest(*test_classes) if __name__ == '__main__': test_main()