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from numpy.testing import *
set_package_path()
from weave import slice_handler
from weave.slice_handler import indexed_array_pattern
from weave.ast_tools import *
restore_path()
def print_assert_equal(test_string,actual,desired):
"""this should probably be in scipy_test.testing
"""
import pprint
try:
assert(actual == desired)
except AssertionError:
import cStringIO
msg = cStringIO.StringIO()
msg.write(test_string)
msg.write(' failed\nACTUAL: \n')
pprint.pprint(actual,msg)
msg.write('DESIRED: \n')
pprint.pprint(desired,msg)
raise AssertionError, msg.getvalue()
class test_build_slice_atom(NumpyTestCase):
def generic_test(self,slice_vars,desired):
pos = slice_vars['pos']
ast_list = slice_handler.build_slice_atom(slice_vars,pos)
actual = ast_to_string(ast_list)
print_assert_equal('',actual,desired)
def check_exclusive_end(self):
slice_vars = {'begin':'1', 'end':'2', 'step':'_stp',
'single_index':'_index','pos':0}
desired = 'slice(1,2-1)'
self.generic_test(slice_vars,desired)
class test_slice(NumpyTestCase):
def generic_test(self,suite_string,desired):
import parser
ast_tuple = parser.suite(suite_string).totuple()
found, data = find_first_pattern(ast_tuple,indexed_array_pattern)
subscript = data['subscript_list'][1] #[0] is symbol, [1] is the supscript
actual = slice_handler.slice_ast_to_dict(subscript)
print_assert_equal(suite_string,actual,desired)
def check_empty_2_slice(self):
"""match slice from a[:]"""
test ="a[:]"
desired = {'begin':'_beg', 'end':'_end', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_2_slice(self):
"""match slice from a[1:]"""
test ="a[1:]"
desired = {'begin':'1', 'end':'_end', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_end_2_slice(self):
"""match slice from a[:2]"""
test ="a[:2]"
desired = {'begin':'_beg', 'end':'2', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_end_2_slice(self):
"""match slice from a[1:2]"""
test ="a[1:2]"
desired = {'begin':'1', 'end':'2', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_empty_3_slice(self):
"""match slice from a[::]"""
test ="a[::]"
desired = {'begin':'_beg', 'end':'_end', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_3_slice(self):
"""match slice from a[1::]"""
test ="a[1::]"
desired = {'begin':'1', 'end':'_end', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_end_3_slice(self):
"""match slice from a[:2:]"""
test ="a[:2:]"
desired = {'begin':'_beg', 'end':'2', 'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_stp3_slice(self):
"""match slice from a[::3]"""
test ="a[::3]"
desired = {'begin':'_beg', 'end':'_end', 'step':'3',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_end_3_slice(self):
"""match slice from a[1:2:]"""
test ="a[1:2:]"
desired = {'begin':'1', 'end':'2','step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_step_3_slice(self):
"""match slice from a[1::3]"""
test ="a[1::3]"
desired = {'begin':'1', 'end':'_end','step':'3',
'single_index':'_index'}
self.generic_test(test,desired)
def check_end_step_3_slice(self):
"""match slice from a[:2:3]"""
test ="a[:2:3]"
desired = {'begin':'_beg', 'end':'2', 'step':'3',
'single_index':'_index'}
self.generic_test(test,desired)
def check_begin_end_stp3_slice(self):
"""match slice from a[1:2:3]"""
test ="a[1:2:3]"
desired = {'begin':'1', 'end':'2', 'step':'3','single_index':'_index'}
self.generic_test(test,desired)
def check_expr_3_slice(self):
"""match slice from a[:1+i+2:]"""
test ="a[:1+i+2:]"
desired = {'begin':'_beg', 'end':"1+i+2",'step':'_stp',
'single_index':'_index'}
self.generic_test(test,desired)
def check_single_index(self):
"""match slice from a[0]"""
test ="a[0]"
desired = {'begin':'_beg', 'end':"_end",'step':'_stp',
'single_index':'0'}
self.generic_test(test,desired)
def replace_whitespace(in_str):
import string
out = string.replace(in_str," ","")
out = string.replace(out,"\t","")
out = string.replace(out,"\n","")
return out
class test_transform_slices(NumpyTestCase):
def generic_test(self,suite_string,desired):
import parser
ast_list = parser.suite(suite_string).tolist()
slice_handler.transform_slices(ast_list)
actual = ast_to_string(ast_list)
# Remove white space from expressions so that equivelant
# but differently formatted string will compare equally
import string
actual = replace_whitespace(actual)
desired = replace_whitespace(desired)
print_assert_equal(suite_string,actual,desired)
def check_simple_expr(self):
"""transform a[:] to slice notation"""
test ="a[:]"
desired = 'a[slice(_beg,_end,_stp)]'
self.generic_test(test,desired)
def check_simple_expr(self):
"""transform a[:,:] = b[:,1:1+2:3] *(c[1-2+i:,:] - c[:,:])"""
test ="a[:,:] = b[:,1:1+2:3] *(c[1-2+i:,:] - c[:,:])"
desired = " a[slice(_beg,_end),slice(_beg,_end)] = "\
" b[slice(_beg,_end), slice(1,1+2-1,3)] *"\
" (c[slice(1-2+i,_end), slice(_beg,_end)] -"\
" c[slice(_beg,_end), slice(_beg,_end)])"
self.generic_test(test,desired)
if __name__ == "__main__":
NumpyTest('weave.slice_handler').run()
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