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
|
#!/usr/bin/env python
"""Unit tests for the keyword only argument specified in PEP 3102."""
__author__ = "Jiwon Seo"
__email__ = "seojiwon at gmail dot com"
import unittest
from test.support import run_unittest
def posonly_sum(pos_arg1, *arg, **kwarg):
return pos_arg1 + sum(arg) + sum(kwarg.values())
def keywordonly_sum(*, k1=0, k2):
return k1 + k2
def keywordonly_nodefaults_sum(*, k1, k2):
return k1 + k2
def keywordonly_and_kwarg_sum(*, k1, k2, **kwarg):
return k1 + k2 + sum(kwarg.values())
def mixedargs_sum(a, b=0, *arg, k1, k2=0):
return a + b + k1 + k2 + sum(arg)
def mixedargs_sum2(a, b=0, *arg, k1, k2=0, **kwargs):
return a + b + k1 + k2 + sum(arg) + sum(kwargs.values())
def sortnum(*nums, reverse=False):
return sorted(list(nums), reverse=reverse)
def sortwords(*words, reverse=False, **kwargs):
return sorted(list(words), reverse=reverse)
class Foo:
def __init__(self, *, k1, k2=0):
self.k1 = k1
self.k2 = k2
def set(self, p1, *, k1, k2):
self.k1 = k1
self.k2 = k2
def sum(self):
return self.k1 + self.k2
class KeywordOnlyArgTestCase(unittest.TestCase):
def assertRaisesSyntaxError(self, codestr):
def shouldRaiseSyntaxError(s):
compile(s, "<test>", "single")
self.assertRaises(SyntaxError, shouldRaiseSyntaxError, codestr)
def testSyntaxErrorForFunctionDefinition(self):
self.assertRaisesSyntaxError("def f(p, *):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, p1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *k1, k1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, k1, k1=100):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, k1, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p1, *, None, **k1):\n pass\n")
self.assertRaisesSyntaxError("def f(p, *, (k1, k2), **kw):\n pass\n")
def testSyntaxForManyArguments(self):
fundef = "def f("
for i in range(255):
fundef += "i%d, "%i
fundef += "*, key=100):\n pass\n"
self.assertRaisesSyntaxError(fundef)
fundef2 = "def foo(i,*,"
for i in range(255):
fundef2 += "i%d, "%i
fundef2 += "lastarg):\n pass\n"
self.assertRaisesSyntaxError(fundef2)
# exactly 255 arguments, should compile ok
fundef3 = "def f(i,*,"
for i in range(253):
fundef3 += "i%d, "%i
fundef3 += "lastarg):\n pass\n"
compile(fundef3, "<test>", "single")
def testSyntaxErrorForFunctionCall(self):
self.assertRaisesSyntaxError("f(p, k=1, p2)")
self.assertRaisesSyntaxError("f(p, k1=50, *(1,2), k1=100)")
def testRaiseErrorFuncallWithUnexpectedKeywordArgument(self):
self.assertRaises(TypeError, keywordonly_sum, ())
self.assertRaises(TypeError, keywordonly_nodefaults_sum, ())
self.assertRaises(TypeError, Foo, ())
try:
keywordonly_sum(k2=100, non_existing_arg=200)
self.fail("should raise TypeError")
except TypeError:
pass
try:
keywordonly_nodefaults_sum(k2=2)
self.fail("should raise TypeError")
except TypeError:
pass
def testFunctionCall(self):
self.assertEqual(1, posonly_sum(1))
self.assertEqual(1+2, posonly_sum(1,**{"2":2}))
self.assertEqual(1+2+3, posonly_sum(1,*(2,3)))
self.assertEqual(1+2+3+4, posonly_sum(1,*(2,3),**{"4":4}))
self.assertEqual(1, keywordonly_sum(k2=1))
self.assertEqual(1+2, keywordonly_sum(k1=1, k2=2))
self.assertEqual(1+2, keywordonly_and_kwarg_sum(k1=1, k2=2))
self.assertEqual(1+2+3, keywordonly_and_kwarg_sum(k1=1, k2=2, k3=3))
self.assertEqual(1+2+3+4,
keywordonly_and_kwarg_sum(k1=1, k2=2,
**{"a":3,"b":4}))
self.assertEqual(1+2, mixedargs_sum(1, k1=2))
self.assertEqual(1+2+3, mixedargs_sum(1, 2, k1=3))
self.assertEqual(1+2+3+4, mixedargs_sum(1, 2, k1=3, k2=4))
self.assertEqual(1+2+3+4+5, mixedargs_sum(1, 2, 3, k1=4, k2=5))
self.assertEqual(1+2, mixedargs_sum2(1, k1=2))
self.assertEqual(1+2+3, mixedargs_sum2(1, 2, k1=3))
self.assertEqual(1+2+3+4, mixedargs_sum2(1, 2, k1=3, k2=4))
self.assertEqual(1+2+3+4+5, mixedargs_sum2(1, 2, 3, k1=4, k2=5))
self.assertEqual(1+2+3+4+5+6,
mixedargs_sum2(1, 2, 3, k1=4, k2=5, k3=6))
self.assertEqual(1+2+3+4+5+6,
mixedargs_sum2(1, 2, 3, k1=4, **{'k2':5, 'k3':6}))
self.assertEqual(1, Foo(k1=1).sum())
self.assertEqual(1+2, Foo(k1=1,k2=2).sum())
self.assertEqual([1,2,3], sortnum(3,2,1))
self.assertEqual([3,2,1], sortnum(1,2,3, reverse=True))
self.assertEqual(['a','b','c'], sortwords('a','c','b'))
self.assertEqual(['c','b','a'], sortwords('a','c','b', reverse=True))
self.assertEqual(['c','b','a'],
sortwords('a','c','b', reverse=True, ignore='ignore'))
def testKwDefaults(self):
def foo(p1,p2=0, *, k1, k2=0):
return p1 + p2 + k1 + k2
self.assertEqual(2, foo.__code__.co_kwonlyargcount)
self.assertEqual({"k2":0}, foo.__kwdefaults__)
foo.__kwdefaults__ = {"k1":0}
try:
foo(1,k1=10)
self.fail("__kwdefaults__ is not properly changed")
except TypeError:
pass
def test_kwonly_methods(self):
class Example:
def f(self, *, k1=1, k2=2):
return k1, k2
self.assertEqual(Example().f(k1=1, k2=2), (1, 2))
self.assertEqual(Example.f(Example(), k1=1, k2=2), (1, 2))
self.assertRaises(TypeError, Example.f, k1=1, k2=2)
def test_main():
run_unittest(KeywordOnlyArgTestCase)
if __name__ == "__main__":
test_main()
|
