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#! /usr/bin/env python
"""Test the arraymodule.
Roger E. Masse
"""
import array
from test_support import verbose, TESTFN, unlink, TestFailed
def main():
testtype('c', 'c')
for type in (['b', 'h', 'i', 'l', 'f', 'd']):
testtype(type, 1)
unlink(TESTFN)
def testoverflow(type, lowerLimit, upperLimit):
# should not overflow assigning lower limit
if verbose:
print "overflow test: array(%s, [%s])" % (`type`, `lowerLimit`)
try:
a = array.array(type, [lowerLimit])
except:
raise TestFailed, "array(%s) overflowed assigning %s" %\
(`type`, `lowerLimit`)
# should overflow assigning less than lower limit
if verbose:
print "overflow test: array(%s, [%s])" % (`type`, `lowerLimit-1`)
try:
a = array.array(type, [lowerLimit-1])
raise TestFailed, "array(%s) did not overflow assigning %s" %\
(`type`, `lowerLimit-1`)
except OverflowError:
pass
# should not overflow assigning upper limit
if verbose:
print "overflow test: array(%s, [%s])" % (`type`, `upperLimit`)
try:
a = array.array(type, [upperLimit])
except:
raise TestFailed, "array(%s) overflowed assigning %s" %\
(`type`, `upperLimit`)
# should overflow assigning more than upper limit
if verbose:
print "overflow test: array(%s, [%s])" % (`type`, `upperLimit+1`)
try:
a = array.array(type, [upperLimit+1])
raise TestFailed, "array(%s) did not overflow assigning %s" %\
(`type`, `upperLimit+1`)
except OverflowError:
pass
def testtype(type, example):
a = array.array(type)
a.append(example)
if verbose:
print 40*'*'
print 'array after append: ', a
a.typecode
a.itemsize
if a.typecode in ('i', 'b', 'h', 'l'):
a.byteswap()
if a.typecode == 'c':
f = open(TESTFN, "w")
f.write("The quick brown fox jumps over the lazy dog.\n")
f.close()
f = open(TESTFN, 'r')
a.fromfile(f, 10)
f.close()
if verbose:
print 'char array with 10 bytes of TESTFN appended: ', a
a.fromlist(['a', 'b', 'c'])
if verbose:
print 'char array with list appended: ', a
a.insert(0, example)
if verbose:
print 'array of %s after inserting another:' % a.typecode, a
f = open(TESTFN, 'w')
a.tofile(f)
f.close()
a.tolist()
a.tostring()
if verbose:
print 'array of %s converted to a list: ' % a.typecode, a.tolist()
if verbose:
print 'array of %s converted to a string: ' \
% a.typecode, `a.tostring()`
if type == 'c':
a = array.array(type, "abcde")
a[:-1] = a
if a != array.array(type, "abcdee"):
raise TestFailed, "array(%s) self-slice-assign (head)" % `type`
a = array.array(type, "abcde")
a[1:] = a
if a != array.array(type, "aabcde"):
raise TestFailed, "array(%s) self-slice-assign (tail)" % `type`
a = array.array(type, "abcde")
a[1:-1] = a
if a != array.array(type, "aabcdee"):
raise TestFailed, "array(%s) self-slice-assign (cntr)" % `type`
else:
a = array.array(type, [1, 2, 3, 4, 5])
a[:-1] = a
if a != array.array(type, [1, 2, 3, 4, 5, 5]):
raise TestFailed, "array(%s) self-slice-assign (head)" % `type`
a = array.array(type, [1, 2, 3, 4, 5])
a[1:] = a
if a != array.array(type, [1, 1, 2, 3, 4, 5]):
raise TestFailed, "array(%s) self-slice-assign (tail)" % `type`
a = array.array(type, [1, 2, 3, 4, 5])
a[1:-1] = a
if a != array.array(type, [1, 1, 2, 3, 4, 5, 5]):
raise TestFailed, "array(%s) self-slice-assign (cntr)" % `type`
# test that overflow exceptions are raised as expected for assignment
# to array of specific integral types
from math import pow
if type in ('b', 'h', 'i', 'l'):
# check signed and unsigned versions
a = array.array(type)
signedLowerLimit = -1 * long(pow(2, a.itemsize * 8 - 1))
signedUpperLimit = long(pow(2, a.itemsize * 8 - 1)) - 1L
unsignedLowerLimit = 0
unsignedUpperLimit = long(pow(2, a.itemsize * 8)) - 1L
testoverflow(type, signedLowerLimit, signedUpperLimit)
testoverflow(type.upper(), unsignedLowerLimit, unsignedUpperLimit)
main()
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