On 09/29/2015 07:38 AM, Markus Armbruster wrote:
> Eric Blake <ebl...@redhat.com> writes:
> 
>> Add some testsuite exposure for use of a 'number' as part of
>> an alternate.  The current state of the tree has a few bugs
>> exposed by this: our input parser depends on the ordering of
>> how the qapi schema declared the alternate, and the parser
>> does not accept integers for a 'number' in an alternate even
>> though it does for numbers outside of an alternate.
>>
>> Mixing 'int' and 'number' in the same alternate is unusual,
>> since both are supplied by json-numbers, but there does not
>> seem to be a technical reason to forbid it given that our
>> json lexer distinguishes between json-numbers that can be
>> represented as an int vs. those that cannot.
>>
>> Improve the existing test_visitor_in_alternate() to match the
>> style of the new test_visitor_in_alternate_number(), and to
>> ensure full coverage of all possible qtype parsing.
>>
>> Signed-off-by: Eric Blake <ebl...@redhat.com>
>>

>> +++ b/tests/test-qmp-input-visitor.c
>> @@ -371,12 +371,133 @@ static void 
>> test_visitor_in_alternate(TestInputVisitorData *data,
>>      UserDefAlternate *tmp;
>>
>>      v = visitor_input_test_init(data, "42");
>> -
>> -    visit_type_UserDefAlternate(v, &tmp, NULL, &err);
>> -    g_assert(err == NULL);
>> +    visit_type_UserDefAlternate(v, &tmp, NULL, &error_abort);
>>      g_assert_cmpint(tmp->kind, ==, USER_DEF_ALTERNATE_KIND_I);
>>      g_assert_cmpint(tmp->i, ==, 42);
>>      qapi_free_UserDefAlternate(tmp);
>> +    visitor_input_teardown(data, NULL);
> 
> Ugly in this test: visitor_input_test_init() is to be paired with
> visitor_input_teardown(), but each test's last visitor_input_teardown()
> can be omitted, because we also pass visitor_input_teardown to
> g_test_add().  Not your patch's fault.  Let's ignore it for now.

In fact, I have another patch coming down the pipeline that moves
visitor_input_teardown() into visitor_input_test_init() (teardown is
idempotent.  And while working on it, I noticed that we could consider
doing something like:

init(data, ...);
func(blah, &data->err);
g_assert(data->err);
teardown(data);

to let teardown() take care of err, instead of having to manually
 error_free(err); err = NULL;
on each reset (particularly nice if visitor_input_test_init() invokes
teardown() itself, for automatic reset semantics).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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