tests/qapi-schema: Make test-qapi.py print arrays

The next few commits mess with array types, and having the changes
exposed in output of test-qapi.py will be useful.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190301154051.23317-2-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Rationale added to commit message]

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

@@ -52,6 +52,9 @@ object UserDefTwo
     member dict1: UserDefTwoDict optional=False
 object UserDefThree
     member string0: str optional=False
+array UserDefOneList UserDefOne
+array UserDefTwoList UserDefTwo
+array TestStructList TestStruct
 object ForceArrays
     member unused1: UserDefOneList optional=False
     member unused2: UserDefTwoList optional=False
@@ -248,6 +251,7 @@ object __org.qemu_x-Union1
     member type: __org.qemu_x-Union1Kind optional=False
     tag type
     case __org.qemu_x-branch: q_obj_str-wrapper
+array __org.qemu_x-Union1List __org.qemu_x-Union1
 object __org.qemu_x-Struct2
     member array: __org.qemu_x-Union1List optional=False
 object __org.qemu_x-Union2
@@ -260,6 +264,8 @@ alternate __org.qemu_x-Alt
     case b: __org.qemu_x-Base
 event __ORG.QEMU_X-EVENT __org.qemu_x-Struct
    boxed=False
+array __org.qemu_x-EnumList __org.qemu_x-Enum
+array __org.qemu_x-StructList __org.qemu_x-Struct
 object q_obj___org.qemu_x-command-arg
     member a: __org.qemu_x-EnumList optional=False
     member b: __org.qemu_x-StructList optional=False

tests/qapi-schema/test-qapi.py

@@ -32,6 +32,12 @@ class QAPISchemaTestVisitor(QAPISchemaVisitor):
             self._print_if(m.ifcond, indent=8)
         self._print_if(ifcond)
 
+    def visit_array_type(self, name, info, ifcond, element_type):
+        if not info:
+            return              # suppress built-in arrays
+        print('array %s %s' % (name, element_type.name))
+        self._print_if(ifcond)
+
     def visit_object_type(self, name, info, ifcond, base, members, variants):
         print('object %s' % name)
         if base: