s4:passwords.py - set the "dSHeuristics"

As per Nadia's request and abartlet's suggestion the test now also sets the
"dSHeuristics" attribute properly to be able to perform the tests also against
Windows without further configuration.

The code has the neat feature that it undoes the change and resets the
behaviour as it was before.

source4/lib/ldb/tests/python/passwords.py

@@ -572,8 +572,41 @@ if not "://" in host:
 
 ldb = SamDB(url=host, session_info=system_session(), credentials=creds, lp=lp)
 
+# Gets back the configuration basedn
+res = ldb.search(base="", expression="", scope=SCOPE_BASE,
+                 attrs=["configurationNamingContext"])
+configuration_dn = res[0]["configurationNamingContext"][0]
+
+# Get the old "dSHeuristics" if it was set
+res = ldb.search("CN=Directory Service, CN=Windows NT, CN=Services, "
+                 + configuration_dn, scope=SCOPE_BASE, attrs=["dSHeuristics"])
+if "dSHeuristics" in res[0]:
+  dsheuristics = res[0]["dSHeuristics"][0]
+else:
+  dsheuristics = None
+
+# Set the "dSHeuristics" to have the tests run against Windows Server
+m = Message()
+m.dn = Dn(ldb, "CN=Directory Service, CN=Windows NT, CN=Services, "
+  + configuration_dn)
+m["dSHeuristics"] = MessageElement("000000001", FLAG_MOD_REPLACE,
+  "dSHeuristics")
+ldb.modify(m)
+
 runner = SubunitTestRunner()
 rc = 0
 if not runner.run(unittest.makeSuite(PasswordTests)).wasSuccessful():
     rc = 1
+
+# Reset the "dSHeuristics" as they were before
+m = Message()
+m.dn = Dn(ldb, "CN=Directory Service, CN=Windows NT, CN=Services, "
+  + configuration_dn)
+if dsheuristics is not None:
+    m["dSHeuristics"] = MessageElement(dsheuristics, FLAG_MOD_REPLACE,
+      "dSHeuristics")
+else:
+    m["dSHeuristics"] = MessageElement([], FLAG_MOD_DELETE, "dsHeuristics")
+ldb.modify(m)
+
 sys.exit(rc)