1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
"""Tests for coverage.templite."""
from coverage.templite import Templite
import unittest
# pylint: disable=W0612,E1101
# Disable W0612 (Unused variable) and
# E1101 (Instance of 'foo' has no 'bar' member)
class AnyOldObject(object):
"""Simple testing object.
Use keyword arguments in the constructor to set attributes on the object.
"""
def __init__(self, **attrs):
for n, v in attrs.items():
setattr(self, n, v)
class TempliteTest(unittest.TestCase):
"""Tests for Templite."""
def try_render(self, text, ctx, result):
"""Render `text` through `ctx`, and it had better be `result`."""
self.assertEqual(Templite(text).render(ctx), result)
def test_passthrough(self):
# Strings without variables are passed through unchanged.
self.assertEqual(Templite("Hello").render(), "Hello")
self.assertEqual(
Templite("Hello, 20% fun time!").render(),
"Hello, 20% fun time!"
)
def test_variables(self):
# Variables use {{var}} syntax.
self.try_render("Hello, {{name}}!", {'name':'Ned'}, "Hello, Ned!")
def test_pipes(self):
# Variables can be filtered with pipes.
data = {
'name': 'Ned',
'upper': lambda x: x.upper(),
'second': lambda x: x[1],
}
self.try_render("Hello, {{name|upper}}!", data, "Hello, NED!")
# Pipes can be concatenated.
self.try_render("Hello, {{name|upper|second}}!", data, "Hello, E!")
def test_reusability(self):
# A single Templite can be used more than once with different data.
globs = {
'upper': lambda x: x.upper(),
'punct': '!',
}
template = Templite("This is {{name|upper}}{{punct}}", globs)
self.assertEqual(template.render({'name':'Ned'}), "This is NED!")
self.assertEqual(template.render({'name':'Ben'}), "This is BEN!")
def test_attribute(self):
# Variables' attributes can be accessed with dots.
obj = AnyOldObject(a="Ay")
self.try_render("{{obj.a}}", locals(), "Ay")
obj2 = AnyOldObject(obj=obj, b="Bee")
self.try_render("{{obj2.obj.a}} {{obj2.b}}", locals(), "Ay Bee")
def test_member_function(self):
# Variables' member functions can be used, as long as they are nullary.
class WithMemberFns(AnyOldObject):
"""A class to try out member function access."""
def ditto(self):
"""Return twice the .txt attribute."""
return self.txt + self.txt
obj = WithMemberFns(txt="Once")
self.try_render("{{obj.ditto}}", locals(), "OnceOnce")
def test_item_access(self):
# Variables' items can be used.
d = {'a':17, 'b':23}
self.try_render("{{d.a}} < {{d.b}}", locals(), "17 < 23")
def test_loops(self):
# Loops work like in Django.
nums = [1,2,3,4]
self.try_render(
"Look: {% for n in nums %}{{n}}, {% endfor %}done.",
locals(),
"Look: 1, 2, 3, 4, done."
)
# Loop iterables can be filtered.
def rev(l):
"""Return the reverse of `l`."""
l = l[:]
l.reverse()
return l
self.try_render(
"Look: {% for n in nums|rev %}{{n}}, {% endfor %}done.",
locals(),
"Look: 4, 3, 2, 1, done."
)
def test_empty_loops(self):
self.try_render(
"Empty: {% for n in nums %}{{n}}, {% endfor %}done.",
{'nums':[]},
"Empty: done."
)
def test_multiline_loops(self):
self.try_render(
"Look: \n{% for n in nums %}\n{{n}}, \n{% endfor %}done.",
{'nums':[1,2,3]},
"Look: \n\n1, \n\n2, \n\n3, \ndone."
)
def test_multiple_loops(self):
self.try_render(
"{% for n in nums %}{{n}}{% endfor %} and "
"{% for n in nums %}{{n}}{% endfor %}",
{'nums': [1,2,3]},
"123 and 123"
)
def test_comments(self):
# Single-line comments work:
self.try_render(
"Hello, {# Name goes here: #}{{name}}!",
{'name':'Ned'}, "Hello, Ned!"
)
# and so do multi-line comments:
self.try_render(
"Hello, {# Name\ngoes\nhere: #}{{name}}!",
{'name':'Ned'}, "Hello, Ned!"
)
def test_if(self):
self.try_render(
"Hi, {% if ned %}NED{% endif %}{% if ben %}BEN{% endif %}!",
{'ned': 1, 'ben': 0},
"Hi, NED!"
)
self.try_render(
"Hi, {% if ned %}NED{% endif %}{% if ben %}BEN{% endif %}!",
{'ned': 0, 'ben': 1},
"Hi, BEN!"
)
self.try_render(
"Hi, {% if ned %}NED{% if ben %}BEN{% endif %}{% endif %}!",
{'ned': 0, 'ben': 0},
"Hi, !"
)
self.try_render(
"Hi, {% if ned %}NED{% if ben %}BEN{% endif %}{% endif %}!",
{'ned': 1, 'ben': 0},
"Hi, NED!"
)
self.try_render(
"Hi, {% if ned %}NED{% if ben %}BEN{% endif %}{% endif %}!",
{'ned': 1, 'ben': 1},
"Hi, NEDBEN!"
)
def test_loop_if(self):
self.try_render(
"@{% for n in nums %}{% if n %}Z{% endif %}{{n}}{% endfor %}!",
{'nums': [0,1,2]},
"@0Z1Z2!"
)
self.try_render(
"X{%if nums%}@{% for n in nums %}{{n}}{% endfor %}{%endif%}!",
{'nums': [0,1,2]},
"X@012!"
)
self.try_render(
"X{%if nums%}@{% for n in nums %}{{n}}{% endfor %}{%endif%}!",
{'nums': []},
"X!"
)
def test_nested_loops(self):
self.try_render(
"@{% for n in nums %}"
"{% for a in abc %}{{a}}{{n}}{% endfor %}"
"{% endfor %}!",
{'nums': [0,1,2], 'abc': ['a', 'b', 'c']},
"@a0b0c0a1b1c1a2b2c2!"
)
def test_exception_during_evaluation(self):
# TypeError: Couldn't evaluate {{ foo.bar.baz }}:
# 'NoneType' object is unsubscriptable
self.assertRaises(TypeError, self.try_render,
"Hey {{foo.bar.baz}} there", {'foo': None}, "Hey ??? there"
)
def test_bogus_tag_syntax(self):
self.assertRaises(SyntaxError, self.try_render,
"Huh: {% bogus %}!!{% endbogus %}??", {}, ""
)
|
