tests/qapi-schema: Demonstrate broken C code for 'if'

The C code generated for 'if' conditionals is incorrectly
parenthesized.  For instance,

    'if': { 'not': { 'any': [ { 'not': 'TEST_IF_EVT' },
			      { 'not': 'TEST_IF_STRUCT' } ] } } }

generates

    #if !(!defined(TEST_IF_EVT)) || (!defined(TEST_IF_STRUCT))

This is wrong.  Correct would be:

    #if !(!defined(TEST_IF_EVT) || !defined(TEST_IF_STRUCT))

Cover the issue in qapi-schema-test.json.  This generates bad #if in
tests/test-qapi-events.h and other files.

Add a similar condition to doc-good.json.  The generated documentation
is fine.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210831123809.1107782-5-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

tests/qapi-schema/doc-good.json

@@ -127,7 +127,7 @@
 { 'alternate': 'Alternate',
   'features': [ 'alt-feat' ],
   'data': { 'i': 'int', 'b': 'bool' },
-  'if': { 'not': 'IFNOT' } }
+  'if': { 'not': { 'any': [ 'IFONE', 'IFTWO' ] } } }
 
 ##
 # == Another subsection

tests/qapi-schema/doc-good.out

@@ -51,7 +51,7 @@ alternate Alternate
     tag type
     case i: int
     case b: bool
-    if OrderedDict([('not', 'IFNOT')])
+    if OrderedDict([('not', OrderedDict([('any', ['IFONE', 'IFTWO'])]))])
     feature alt-feat
 object q_obj_cmd-arg
     member arg1: int optional=False

tests/qapi-schema/doc-good.txt

@@ -174,7 +174,7 @@ Features
 If
 ~~
 
-"!IFNOT"
+"!(IFONE or IFTWO)"
 
 
 Another subsection

tests/qapi-schema/qapi-schema-test.json

@@ -261,6 +261,11 @@
     'bar': { 'type': ['TestIfEnum'], 'if': 'TEST_IF_EVT_BAR' } },
   'if': { 'all': ['TEST_IF_EVT', 'TEST_IF_STRUCT'] } }
 
+{ 'event': 'TEST_IF_EVENT2', 'data': {},
+  # FIXME C #if generated for this conditional is wrong
+  'if': { 'not': { 'any': [ { 'not': 'TEST_IF_EVT' },
+                            { 'not': 'TEST_IF_STRUCT' } ] } } }
+
 # test 'features'
 
 { 'struct': 'FeatureStruct0',

tests/qapi-schema/qapi-schema-test.out

@@ -357,6 +357,9 @@ object q_obj_TEST_IF_EVENT-arg
 event TEST_IF_EVENT q_obj_TEST_IF_EVENT-arg
     boxed=False
     if OrderedDict([('all', ['TEST_IF_EVT', 'TEST_IF_STRUCT'])])
+event TEST_IF_EVENT2 None
+    boxed=False
+    if OrderedDict([('not', OrderedDict([('any', [OrderedDict([('not', 'TEST_IF_EVT')]), OrderedDict([('not', 'TEST_IF_STRUCT')])])]))])
 object FeatureStruct0
     member foo: int optional=False
 object FeatureStruct1