BIND 10 #1068: support writability in the new data source API

[BIND 10 Development]

#1068: support writability in the new data source API
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                   Reporter:         |                 Owner:  jinmei
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:  major  |  Sprint-20110927
                  Component:  data   |            Resolution:
  source                             |             Sensitive:  0
                   Keywords:         |           Sub-Project:  DNS
            Defect Severity:  N/A    |  Estimated Difficulty:  7.0
Feature Depending on Ticket:         |           Total Hours:  0
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 Replying to [comment:20 vorner]:

 > Anyway, this part is OK to be merged (or you can wait for the rest to
 finish being reviewed).

 Okay, thanks.  I'll push this part soon anyway.  Other tasks depend on
 this
 (the last part is only for tests on which no one depends), so it would be
 more convenient to be in the master.

 > It looks OK. But I'm thinking about one thing ‒ there are several tests
 that are skipped with different types than the MockAccessor (like
 nullIteratorContext). Should we take them out of the typed tests and do
 something like this? So they wouldn't show up in the outputs when they are
 effectively empty.

 Hmm, I personally don't care much about it showing up multiple times
 (and would prefer avoiding additional tricks), but I also realize it
 makes the body of the test code simpler by omitting the need for
 checking is_mock_.  So I made the suggested change.

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Ticket URL: <http://bind10.isc.org/ticket/1068#comment:21>
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