[PATCH 1 of 4] test-manifest.py: separate out test for double-free after copy()

[Martin von Zweigbergk]

# HG changeset patch
# User Martin von Zweigbergk <martinvonz at google.com>
# Date 1427318494 25200
#      Wed Mar 25 14:21:34 2015 -0700
# Node ID 48c5eec1c7caddf2c8ca84541443126dcd551f73
# Parent  98042b0e19f9a04be3270cecb07915eac3a515cf
test-manifest.py: separate out test for double-free after copy()

The test that we don't double-free anything after creating a copy is
currently mixed with the __setitem__ test. Let's separate them.

diff -r 98042b0e19f9 -r 48c5eec1c7ca tests/test-manifest.py
--- a/tests/test-manifest.py	Wed Mar 25 14:16:10 2015 -0500
+++ b/tests/test-manifest.py	Wed Mar 25 14:21:34 2015 -0700
@@ -69,6 +69,10 @@
         self.assertEqual(want, m['a'])
         self.assertEqual('a\0' + HASH_1 + '\n' + A_SHORT_MANIFEST,
                          m.text())
+
+    def testCopy(self):
+        m = manifestmod._lazymanifest(A_SHORT_MANIFEST)
+        m['a'] =  binascii.unhexlify(HASH_1), ''
         m2 = m.copy()
         del m
         del m2 # make sure we don't double free() anything