diff options
Diffstat (limited to 'Lib/test/test_string.py')
| -rw-r--r-- | Lib/test/test_string.py | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/Lib/test/test_string.py b/Lib/test/test_string.py index 0cd2b86217..faefb0d55b 100644 --- a/Lib/test/test_string.py +++ b/Lib/test/test_string.py @@ -187,5 +187,245 @@ class ModuleTest(unittest.TestCase): self.assertIn("recursion", str(err.exception)) +# Template tests (formerly housed in test_pep292.py) + +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 = string.Template('$who likes to eat a bag of $what worth $$100') + self.assertEqual(s.substitute(dict(who='tim', what='ham')), + 'tim likes to eat a bag of ham worth $100') + self.assertRaises(KeyError, s.substitute, dict(who='tim')) + self.assertRaises(TypeError, string.Template.substitute) + + def test_regular_templates_with_braces(self): + s = string.Template('$who likes ${what} for ${meal}') + d = dict(who='tim', what='ham', meal='dinner') + self.assertEqual(s.substitute(d), 'tim likes ham for dinner') + self.assertRaises(KeyError, s.substitute, + dict(who='tim', what='ham')) + + def test_escapes(self): + eq = self.assertEqual + s = string.Template('$who likes to eat a bag of $$what worth $$100') + eq(s.substitute(dict(who='tim', what='ham')), + 'tim likes to eat a bag of $what worth $100') + s = string.Template('$who likes $$') + eq(s.substitute(dict(who='tim', what='ham')), 'tim likes $') + + def test_percents(self): + eq = self.assertEqual + s = string.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 = string.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 = string.Template('tim has eaten ${count} bags of ham today') + eq(s.substitute(d), 'tim has eaten 7 bags of ham today') + + def test_tupleargs(self): + eq = self.assertEqual + s = string.Template('$who ate ${meal}') + d = dict(who=('tim', 'fred'), meal=('ham', 'kung pao')) + eq(s.substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')") + eq(s.safe_substitute(d), "('tim', 'fred') ate ('ham', 'kung pao')") + + def test_SafeTemplate(self): + eq = self.assertEqual + s = string.Template('$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 ${meal}') + eq(s.safe_substitute(dict(who='tim', what='ham', meal='dinner')), + 'tim likes ham for dinner') + + def test_invalid_placeholders(self): + raises = self.assertRaises + s = string.Template('$who likes $') + raises(ValueError, s.substitute, dict(who='tim')) + s = string.Template('$who likes ${what)') + raises(ValueError, s.substitute, dict(who='tim')) + s = string.Template('$who likes $100') + raises(ValueError, s.substitute, dict(who='tim')) + + def test_idpattern_override(self): + class PathPattern(string.Template): + idpattern = r'[_a-z][._a-z0-9]*' + m = Mapping() + m.bag = Bag() + m.bag.foo = Bag() + m.bag.foo.who = 'tim' + m.bag.what = 'ham' + s = PathPattern('$bag.foo.who likes to eat a bag of $bag.what') + self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham') + + def test_pattern_override(self): + class MyPattern(string.Template): + pattern = r""" + (?P<escaped>@{2}) | + @(?P<named>[_a-z][._a-z0-9]*) | + @{(?P<braced>[_a-z][._a-z0-9]*)} | + (?P<invalid>@) + """ + m = Mapping() + m.bag = Bag() + m.bag.foo = Bag() + m.bag.foo.who = 'tim' + m.bag.what = 'ham' + s = MyPattern('@bag.foo.who likes to eat a bag of @bag.what') + self.assertEqual(s.substitute(m), 'tim likes to eat a bag of ham') + + class BadPattern(string.Template): + pattern = r""" + (?P<badname>.*) | + (?P<escaped>@{2}) | + @(?P<named>[_a-z][._a-z0-9]*) | + @{(?P<braced>[_a-z][._a-z0-9]*)} | + (?P<invalid>@) | + """ + s = BadPattern('@bag.foo.who likes to eat a bag of @bag.what') + self.assertRaises(ValueError, s.substitute, {}) + self.assertRaises(ValueError, s.safe_substitute, {}) + + def test_braced_override(self): + class MyTemplate(string.Template): + pattern = r""" + \$(?: + (?P<escaped>$) | + (?P<named>[_a-z][_a-z0-9]*) | + @@(?P<braced>[_a-z][_a-z0-9]*)@@ | + (?P<invalid>) | + ) + """ + + tmpl = 'PyCon in $@@location@@' + t = MyTemplate(tmpl) + self.assertRaises(KeyError, t.substitute, {}) + val = t.substitute({'location': 'Cleveland'}) + self.assertEqual(val, 'PyCon in Cleveland') + + def test_braced_override_safe(self): + class MyTemplate(string.Template): + pattern = r""" + \$(?: + (?P<escaped>$) | + (?P<named>[_a-z][_a-z0-9]*) | + @@(?P<braced>[_a-z][_a-z0-9]*)@@ | + (?P<invalid>) | + ) + """ + + tmpl = 'PyCon in $@@location@@' + t = MyTemplate(tmpl) + self.assertEqual(t.safe_substitute(), tmpl) + val = t.safe_substitute({'location': 'Cleveland'}) + self.assertEqual(val, 'PyCon in Cleveland') + + def test_invalid_with_no_lines(self): + # The error formatting for invalid templates + # has a special case for no data that the default + # pattern can't trigger (always has at least '$') + # So we craft a pattern that is always invalid + # with no leading data. + class MyTemplate(string.Template): + pattern = r""" + (?P<invalid>) | + unreachable( + (?P<named>) | + (?P<braced>) | + (?P<escaped>) + ) + """ + s = MyTemplate('') + with self.assertRaises(ValueError) as err: + s.substitute({}) + self.assertIn('line 1, col 1', str(err.exception)) + + def test_unicode_values(self): + s = string.Template('$who likes $what') + d = dict(who='t\xffm', what='f\xfe\fed') + self.assertEqual(s.substitute(d), 't\xffm likes f\xfe\x0ced') + + def test_keyword_arguments(self): + eq = self.assertEqual + s = string.Template('$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 = string.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') + + s = string.Template('the self is $self') + eq(s.substitute(self='bozo'), 'the self is bozo') + + def test_keyword_arguments_safe(self): + eq = self.assertEqual + raises = self.assertRaises + s = string.Template('$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 = string.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, {}) + + s = string.Template('the self is $self') + eq(s.safe_substitute(self='bozo'), 'the self is bozo') + + def test_delimiter_override(self): + eq = self.assertEqual + raises = self.assertRaises + class AmpersandTemplate(string.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} &') + + class PieDelims(string.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') + + if __name__ == "__main__": unittest.main() |