test_format.py revision d8c628bd59f70b5389c39fd9e6a15cb3e2d46f27 
1from test_support import verbose
2import sys
3
4# test string formatting operator (I am not sure if this is being tested
5# elsewhere but, surely, some of the given cases are *not* tested because
6# they crash python)
7# test on unicode strings as well
8
9overflowok = 1
10
11def testformat(formatstr, args, output=None):
12    if verbose:
13        if output:
14            print "%s %% %s =? %s ..." %\
15                (repr(formatstr), repr(args), repr(output)),
16        else:
17            print "%s %% %s works? ..." % (repr(formatstr), repr(args)),
18    try:
19        result = formatstr % args
20    except OverflowError:
21        if not overflowok:
22            raise
23        if verbose:
24            print 'overflow (this is fine)'
25    else:
26        if output and result != output:
27            if verbose:
28                print 'no'
29            print "%s %% %s == %s != %s" %\
30                (repr(formatstr), repr(args), repr(result), repr(output))
31        else:
32            if verbose:
33                print 'yes'
34
35def testboth(formatstr, *args):
36    testformat(formatstr, *args)
37    testformat(unicode(formatstr), *args)
38
39
40testboth("%.1d", (1,), "1")
41testboth("%.*d", (sys.maxint,1))  # expect overflow
42testboth("%.100d", (1,), '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
43testboth("%#.117x", (1,), '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
44testboth("%#.118x", (1,), '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001')
45
46testboth("%f", (1.0,), "1.000000")
47# these are trying to test the limits of the internal magic-number-length
48# formatting buffer, if that number changes then these tests are less
49# effective
50testboth("%#.*g", (109, -1.e+49/3.))
51testboth("%#.*g", (110, -1.e+49/3.))
52testboth("%#.*g", (110, -1.e+100/3.))
53
54# test some ridiculously large precision, expect overflow
55testboth('%12.*f', (123456, 1.0))
56
57# Formatting of long integers. Overflow is not ok
58overflowok = 0
59testboth("%x", 10L, "a")
60testboth("%x", 100000000000L, "174876e800")
61testboth("%o", 10L, "12")
62testboth("%o", 100000000000L, "1351035564000")
63testboth("%d", 10L, "10")
64testboth("%d", 100000000000L, "100000000000")
65
66big = 123456789012345678901234567890L
67testboth("%d", big, "123456789012345678901234567890")
68testboth("%d", -big, "-123456789012345678901234567890")
69testboth("%5d", -big, "-123456789012345678901234567890")
70testboth("%31d", -big, "-123456789012345678901234567890")
71testboth("%32d", -big, " -123456789012345678901234567890")
72testboth("%-32d", -big, "-123456789012345678901234567890 ")
73testboth("%032d", -big, "-0123456789012345678901234567890")
74testboth("%-032d", -big, "-123456789012345678901234567890 ")
75testboth("%034d", -big, "-000123456789012345678901234567890")
76testboth("%034d", big, "0000123456789012345678901234567890")
77testboth("%0+34d", big, "+000123456789012345678901234567890")
78testboth("%+34d", big, "   +123456789012345678901234567890")
79testboth("%34d", big, "    123456789012345678901234567890")
80testboth("%.2d", big, "123456789012345678901234567890")
81testboth("%.30d", big, "123456789012345678901234567890")
82testboth("%.31d", big, "0123456789012345678901234567890")
83testboth("%32.31d", big, " 0123456789012345678901234567890")
84
85big = 0x1234567890abcdef12345L  # 21 hex digits
86testboth("%x", big, "1234567890abcdef12345")
87testboth("%x", -big, "-1234567890abcdef12345")
88testboth("%5x", -big, "-1234567890abcdef12345")
89testboth("%22x", -big, "-1234567890abcdef12345")
90testboth("%23x", -big, " -1234567890abcdef12345")
91testboth("%-23x", -big, "-1234567890abcdef12345 ")
92testboth("%023x", -big, "-01234567890abcdef12345")
93testboth("%-023x", -big, "-1234567890abcdef12345 ")
94testboth("%025x", -big, "-0001234567890abcdef12345")
95testboth("%025x", big, "00001234567890abcdef12345")
96testboth("%0+25x", big, "+0001234567890abcdef12345")
97testboth("%+25x", big, "   +1234567890abcdef12345")
98testboth("%25x", big, "    1234567890abcdef12345")
99testboth("%.2x", big, "1234567890abcdef12345")
100testboth("%.21x", big, "1234567890abcdef12345")
101testboth("%.22x", big, "01234567890abcdef12345")
102testboth("%23.22x", big, " 01234567890abcdef12345")
103testboth("%-23.22x", big, "01234567890abcdef12345 ")
104testboth("%X", big, "1234567890ABCDEF12345")
105testboth("%#X", big, "0X1234567890ABCDEF12345")
106testboth("%#x", big, "0x1234567890abcdef12345")
107testboth("%#x", -big, "-0x1234567890abcdef12345")
108testboth("%#.23x", -big, "-0x001234567890abcdef12345")
109testboth("%#+.23x", big, "+0x001234567890abcdef12345")
110testboth("%# .23x", big, " 0x001234567890abcdef12345")
111testboth("%#+.23X", big, "+0X001234567890ABCDEF12345")
112testboth("%#-+.23X", big, "+0X001234567890ABCDEF12345")
113testboth("%#-+26.23X", big, "+0X001234567890ABCDEF12345")
114testboth("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ")
115testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345")
116# next one gets two leading zeroes from precision, and another from the
117# 0 flag and the width
118testboth("%#+027.23X", big, "+0X0001234567890ABCDEF12345")
119# same, except no 0 flag
120testboth("%#+27.23X", big, " +0X001234567890ABCDEF12345")
121
122big = 012345670123456701234567012345670L  # 32 octal digits
123testboth("%o", big, "12345670123456701234567012345670")
124testboth("%o", -big, "-12345670123456701234567012345670")
125testboth("%5o", -big, "-12345670123456701234567012345670")
126testboth("%33o", -big, "-12345670123456701234567012345670")
127testboth("%34o", -big, " -12345670123456701234567012345670")
128testboth("%-34o", -big, "-12345670123456701234567012345670 ")
129testboth("%034o", -big, "-012345670123456701234567012345670")
130testboth("%-034o", -big, "-12345670123456701234567012345670 ")
131testboth("%036o", -big, "-00012345670123456701234567012345670")
132testboth("%036o", big, "000012345670123456701234567012345670")
133testboth("%0+36o", big, "+00012345670123456701234567012345670")
134testboth("%+36o", big, "   +12345670123456701234567012345670")
135testboth("%36o", big, "    12345670123456701234567012345670")
136testboth("%.2o", big, "12345670123456701234567012345670")
137testboth("%.32o", big, "12345670123456701234567012345670")
138testboth("%.33o", big, "012345670123456701234567012345670")
139testboth("%34.33o", big, " 012345670123456701234567012345670")
140testboth("%-34.33o", big, "012345670123456701234567012345670 ")
141testboth("%o", big, "12345670123456701234567012345670")
142testboth("%#o", big, "012345670123456701234567012345670")
143testboth("%#o", -big, "-012345670123456701234567012345670")
144testboth("%#.34o", -big, "-0012345670123456701234567012345670")
145testboth("%#+.34o", big, "+0012345670123456701234567012345670")
146testboth("%# .34o", big, " 0012345670123456701234567012345670")
147testboth("%#+.34o", big, "+0012345670123456701234567012345670")
148testboth("%#-+.34o", big, "+0012345670123456701234567012345670")
149testboth("%#-+37.34o", big, "+0012345670123456701234567012345670  ")
150testboth("%#+37.34o", big, "  +0012345670123456701234567012345670")
151# next one gets one leading zero from precision
152testboth("%.33o", big, "012345670123456701234567012345670")
153# base marker shouldn't change that, since "0" is redundant
154testboth("%#.33o", big, "012345670123456701234567012345670")
155# but reduce precision, and base marker should add a zero
156testboth("%#.32o", big, "012345670123456701234567012345670")
157# one leading zero from precision, and another from "0" flag & width
158testboth("%034.33o", big, "0012345670123456701234567012345670")
159# base marker shouldn't change that
160testboth("%0#34.33o", big, "0012345670123456701234567012345670")
161
162# Some small ints, in both Python int and long flavors).
163testboth("%d", 42, "42")
164testboth("%d", -42, "-42")
165testboth("%d", 42L, "42")
166testboth("%d", -42L, "-42")
167
168testboth("%x", 0x42, "42")
169# testboth("%x", -0x42, "ffffffbe") # Alas, that's specific to 32-bit machines
170testboth("%x", 0x42L, "42")
171testboth("%x", -0x42L, "-42")
172
173testboth("%o", 042, "42")
174# testboth("%o", -042, "37777777736") # Alas, that's specific to 32-bit machines
175testboth("%o", 042L, "42")
176testboth("%o", -042L, "-42")
177
178# Test exception for unknown format characters
179if verbose:
180    print 'Testing exceptions'
181
182def test_exc(formatstr, args, exception, excmsg):
183    try:
184        testformat(formatstr, args)
185    except exception, exc:
186        if str(exc) == excmsg:
187            if verbose:
188                print "yes"
189        else:
190            if verbose: print 'no'
191            print 'Unexpected ', exception, ':', repr(str(exc))
192    except:
193        if verbose: print 'no'
194        print 'Unexpected exception'
195        raise
196
197test_exc('abc %a', 1, ValueError,
198         "unsupported format character 'a' (0x61) at index 5")
199test_exc(u'abc %\u3000', 1, ValueError,
200         "unsupported format character '?' (0x3000) at index 5")
201