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from java.util import ArrayList, List, Vector
from copy import copy
import unittest
import test.test_support
class CollectionProxyTest(unittest.TestCase):
def _perform_op(self, value, op_func):
"""
Perform an operation
value - the value to operate on
op_func - the function that applies the operation to value
Returns:
the result of calling op_func, OR the exception that was raised in op_func
"""
try:
return op_func(value)
except Exception, e:
return type(e)
def _arraylist_of(self, xs):
"""
Converts a python list to a java.util.ArrayList
"""
a = ArrayList()
a.addAll( xs )
return a
def check_list(self, control, results, list_type_names, initial, test_name):
for result, type_name in zip(results, list_type_names):
try:
len(result)
except:
print result
self.assertEquals(len(control), len(result), "%s: length for %s does not match that of list" % (test_name, type_name))
for control_value, result_value in zip(control, result):
self.assertEquals(control_value, result_value, "%s: values from %s do not match those from list" % (test_name, type_name))
def _list_op_test(self, initial_value, op_func, test_name):
"""
Tests a list operation
Ensures that performing an operation on:
- a python list
- a java.util.List instance
gives the same result in both cases
"""
lists = [list(initial_value), ArrayList(initial_value), Vector(initial_value)]
list_type_names = ['list', 'ArrayList', 'Vector']
results = [self._perform_op(l, op_func) for l in lists]
self.check_list(lists[0], lists[1:], list_type_names[1:], initial_value, test_name)
if not isinstance(results[0], list):
for r,n in zip(results[1:], list_type_names[1:]):
self.assertEquals(results[0], r, '%s: result for list does not match result for java type %s' % (test_name,n) )
else:
self.check_list(results[0], results[1:], list_type_names[1:], initial_value, test_name)
def test_get_integer(self):
initial_value = range(0, 5)
for i in xrange(-7, 7):
self._list_op_test(initial_value, lambda xs: xs[i], 'get_integer [%d]' % (i,))
def test_get_slice(self):
initial_value = range(0, 5)
for i in [None] + range(-7, 7):
for j in [None] + range(-7, 7):
for k in [None] + range(-7, 7):
self._list_op_test(initial_value, lambda xs: xs[i:j:k], 'get_slice [%s:%s:%s]' % (i,j,k))
def test_set_integer(self):
initial_value = range(0, 5)
def make_op_func(index):
def _f(xs):
xs[index] = 100
return _f
for i in xrange(-7, 7):
self._list_op_test(initial_value, make_op_func(i), 'set_integer [%d]' % (i,))
def test_set_slice(self):
initial_value = range(0, 5)
def make_op_func(i, j, k, v):
def _f(xs):
xs[i:j:k] = v
return _f
for i in [None] + range(-7, 7):
for j in [None] + range(-7, 7):
for k in [None] + range(-7, 7):
self._list_op_test(initial_value, make_op_func(i, j, k, []), 'set_slice [%s:%s:%s]=[]' % (i,j,k))
self._list_op_test(initial_value, make_op_func(i, j, k, range(0,2)), 'set_slice [%s:%s:%s]=range(0,2)' % (i,j,k))
self._list_op_test(initial_value, make_op_func(i, j, k, range(0,4)), 'set_slice [%s:%s:%s]=range(0,4)' % (i,j,k))
self._list_op_test(initial_value, make_op_func(i, j, k, xrange(0,2)), 'set_slice [%s:%s:%s]=xrange(0,2)' % (i,j,k))
self._list_op_test(initial_value, make_op_func(i, j, k, self._arraylist_of(range(0,2))), 'set_slice [%s:%s:%s]=ArrayList(range(0,2))' % (i,j,k))
self._list_op_test([1,2,3,4,5], make_op_func(1, None, None, [1,2,3,4,5]), 'set_slice [1:]=[1,2,3,4,5]')
def test_del_integer(self):
initial_value = range(0,5)
def make_op_func(index):
def _f(xs):
del xs[index]
return _f
for i in xrange(-7, 7):
self._list_op_test(initial_value, make_op_func(i), 'del_integer [%d]' % (i,))
def test_del_slice(self):
initial_value = range(0,5)
def make_op_func(i, j, k):
def _f(xs):
del xs[i:j:k]
return _f
for i in [None] + range(-7, 7):
for j in [None] + range(-7, 7):
for k in [None] + range(-7, 7):
self._list_op_test(initial_value, make_op_func(i, j, k), 'del_slice [%s:%s:%s]' % (i,j,k))
def test_len(self):
jlist = ArrayList()
jlist.addAll(range(0, 10))
self.assert_(len(jlist) == 10)
def test_iter(self):
jlist = ArrayList()
jlist.addAll(range(0, 10))
i = iter(jlist)
x = list(i)
self.assert_(x == range(0, 10))
def test_override_len(self):
class MyList (ArrayList):
def __len__(self):
return self.size() + 1;
m = MyList()
m.addAll(range(0,10))
self.assert_(len(m) == 11)
def test_override_iter(self):
class MyList (ArrayList):
def __iter__(self):
return iter(self.subList(0, self.size() - 1));
m = MyList()
m.addAll(range(0,10))
i = iter(m)
x = list(i)
self.assert_(x == range(0, 9))
def test_override_getsetdelitem(self):
# Create an ArrayList subclass that provides some silly overrides for get/set/del item
class MyList (ArrayList):
def __getitem__(self, key):
return self.get(key) * 2;
def __setitem__(self, key, value):
return self.set(key, value * 2);
def __delitem__(self, key):
self.add(84)
m = MyList()
m.addAll(range(0,10))
self.assert_(m[1] == 2)
self.assert_(m.get(1) == 1)
m[0] = 3
self.assert_(m.get(0) == 6)
self.assert_(m[0] == 12)
del m[0]
self.assert_(m.size() == 11)
self.assert_(m.get(10) == 84)
def test_set_slice_from_input_types(self):
"""
Tests the slice setting functionality of Python lists
Ensures that the results are all the same, whether the source list is a Python list, a java.util.List or an iterator
"""
initial_value = range(0, 5)
def make_op_func(i, j, k, v):
def _f(xs):
xs[i:j:k] = v
return _f
for i in [None] + range(-7, 7):
for j in [None] + range(-7, 7):
for k in [None] + range(-7, 7):
destPy = copy(initial_value)
destJUL = copy(initial_value)
destIter = copy(initial_value)
sourcePy = range(0, 2)
sourceJUL = self._arraylist_of(range(0, 2))
sourceIter = xrange(0, 2)
resultPy = self._perform_op(destPy, make_op_func(i, j, k, sourcePy))
resultJUL = self._perform_op(destJUL, make_op_func(i, j, k, sourceJUL))
resultIter = self._perform_op(destIter, make_op_func(i, j, k, sourceIter))
self.assertEquals(resultPy, resultJUL)
self.assertEquals(resultPy, resultIter)
self.assertEquals(destPy, destJUL)
self.assertEquals(destPy, destIter)
def test_main():
test.test_support.run_unittest(CollectionProxyTest)
if __name__ == "__main__":
test_main()
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