Implement extended slicing in bytes objects.
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index 210f08c..be95935 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -163,6 +163,17 @@
self.assertEqual(b[-5:100], by("world"))
self.assertEqual(b[-100:5], by("Hello"))
+ def test_extended_getslice(self):
+ # Test extended slicing by comparing with list slicing.
+ L = list(range(255))
+ b = bytes(L)
+ indices = (0, None, 1, 3, 19, 100, -1, -2, -31, -100)
+ for start in indices:
+ for stop in indices:
+ # Skip step 0 (invalid)
+ for step in indices[1:]:
+ self.assertEqual(b[start:stop:step], bytes(L[start:stop:step]))
+
def test_regexps(self):
def by(s):
return bytes(map(ord, s))
@@ -239,6 +250,26 @@
b[3:0] = [42, 42, 42]
self.assertEqual(b, bytes([0, 1, 2, 42, 42, 42, 3, 4, 5, 6, 7, 8, 9]))
+ def test_extended_set_del_slice(self):
+ indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
+ for start in indices:
+ for stop in indices:
+ # Skip invalid step 0
+ for step in indices[1:]:
+ L = list(range(255))
+ b = bytes(L)
+ # Make sure we have a slice of exactly the right length,
+ # but with different data.
+ data = L[start:stop:step]
+ data.reverse()
+ L[start:stop:step] = data
+ b[start:stop:step] = data
+ self.assertEquals(b, bytes(L))
+
+ del L[start:stop:step]
+ del b[start:stop:step]
+ self.assertEquals(b, bytes(L))
+
def test_setslice_trap(self):
# This test verifies that we correctly handle assigning self
# to a slice of self (the old Lambert Meertens trap).