tests/qapi-schema: Cover feature documentation comments

Commit 8aa3a33e44 "tests/qapi-schema: Test for good feature lists in
structs" neglected to cover documentation comments, and the previous
commit followed its example.  Make up for them.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20191018081454.21369-5-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

tests/qapi-schema/doc-good.json

@@ -71,8 +71,12 @@
 # A paragraph
 #
 # Another paragraph (but no @var: line)
+#
+# Features:
+# @variant1-feat: a feature
 ##
 { 'struct': 'Variant1',
+  'features': [ 'variant1-feat' ],
   'data': { 'var1': { 'type': 'str', 'if': 'defined(IFSTR)' } } }
 
 ##
@@ -104,6 +108,10 @@
 #
 # @arg2: the second
 # argument
+#
+# Features:
+# @cmd-feat1: a feature
+# @cmd-feat2: another feature
 # Note: @arg3 is undocumented
 # Returns: @Object
 # TODO: frobnicate
@@ -123,11 +131,15 @@
 ##
 { 'command': 'cmd',
   'data': { 'arg1': 'int', '*arg2': 'str', 'arg3': 'bool' },
-  'returns': 'Object' }
+  'returns': 'Object',
+  'features': [ 'cmd-feat1', 'cmd-feat2' ] }
 
 ##
 # @cmd-boxed:
 # If you're bored enough to read this, go see a video of boxed cats
+# Features:
+# @cmd-feat1: a feature
+# @cmd-feat2: another feature
 # Example:
 #
 # -> in
@@ -135,4 +147,5 @@
 # <- out
 ##
 { 'command': 'cmd-boxed', 'boxed': true,
-  'data': 'Object' }
+  'data': 'Object',
+  'features': [ 'cmd-feat1', 'cmd-feat2' ] }

tests/qapi-schema/doc-good.out

@@ -20,6 +20,7 @@ object Base
 object Variant1
     member var1: str optional=False
         if ['defined(IFSTR)']
+    feature variant1-feat
 object Variant2
 object Object
     base Base
@@ -47,8 +48,12 @@ object q_obj_cmd-arg
     member arg3: bool optional=False
 command cmd q_obj_cmd-arg -> Object
     gen=True success_response=True boxed=False oob=False preconfig=False
+    feature cmd-feat1
+    feature cmd-feat2
 command cmd-boxed Object -> None
     gen=True success_response=True boxed=True oob=False preconfig=False
+    feature cmd-feat1
+    feature cmd-feat2
 doc freeform
     body=
 = Section

tests/qapi-schema/doc-good.texi

@@ -122,6 +122,12 @@ Not documented
 @*@b{If:} @code{defined(IFSTR)}
 @end table
 
+@b{Features:}
+@table @asis
+@item @code{variant1-feat}
+a feature
+@end table
+
 @end deftp
 
 
@@ -182,6 +188,14 @@ argument
 Not documented
 @end table
 
+@b{Features:}
+@table @asis
+@item @code{cmd-feat1}
+a feature
+@item @code{cmd-feat2}
+another feature
+@end table
+
 @b{Note:}
 @code{arg3} is undocumented
 
@@ -227,6 +241,14 @@ If you're bored enough to read this, go see a video of boxed cats
 
 @b{Arguments:} the members of @code{Object}
 
+@b{Features:}
+@table @asis
+@item @code{cmd-feat1}
+a feature
+@item @code{cmd-feat2}
+another feature
+@end table
+
 @b{Example:}
 @example
 -> in