xref: /qemu/tests/qapi-schema/test-qapi.py (revision 654d6b04) 
1#!/usr/bin/env python3
2#
3# QAPI parser test harness
4#
5# Copyright (c) 2013 Red Hat Inc.
6#
7# Authors:
8#  Markus Armbruster <armbru@redhat.com>
9#
10# This work is licensed under the terms of the GNU GPL, version 2 or later.
11# See the COPYING file in the top-level directory.
12#
13
14
15import argparse
16import difflib
17import os
18import sys
19from io import StringIO
20
21from qapi.error import QAPIError
22from qapi.schema import QAPISchema, QAPISchemaVisitor
23
24
25class QAPISchemaTestVisitor(QAPISchemaVisitor):
26
27    def visit_module(self, name):
28        print('module %s' % name)
29
30    def visit_include(self, name, info):
31        print('include %s' % name)
32
33    def visit_enum_type(self, name, info, ifcond, features, members, prefix):
34        print('enum %s' % name)
35        if prefix:
36            print('    prefix %s' % prefix)
37        for m in members:
38            print('    member %s' % m.name)
39            self._print_if(m.ifcond, indent=8)
40        self._print_if(ifcond)
41        self._print_features(features)
42
43    def visit_array_type(self, name, info, ifcond, element_type):
44        if not info:
45            return              # suppress built-in arrays
46        print('array %s %s' % (name, element_type.name))
47        self._print_if(ifcond)
48
49    def visit_object_type(self, name, info, ifcond, features,
50                          base, members, variants):
51        print('object %s' % name)
52        if base:
53            print('    base %s' % base.name)
54        for m in members:
55            print('    member %s: %s optional=%s'
56                  % (m.name, m.type.name, m.optional))
57            self._print_if(m.ifcond, 8)
58            self._print_features(m.features, indent=8)
59        self._print_variants(variants)
60        self._print_if(ifcond)
61        self._print_features(features)
62
63    def visit_alternate_type(self, name, info, ifcond, features, variants):
64        print('alternate %s' % name)
65        self._print_variants(variants)
66        self._print_if(ifcond)
67        self._print_features(features)
68
69    def visit_command(self, name, info, ifcond, features,
70                      arg_type, ret_type, gen, success_response, boxed,
71                      allow_oob, allow_preconfig, coroutine):
72        print('command %s %s -> %s'
73              % (name, arg_type and arg_type.name,
74                 ret_type and ret_type.name))
75        print('    gen=%s success_response=%s boxed=%s oob=%s preconfig=%s%s'
76              % (gen, success_response, boxed, allow_oob, allow_preconfig,
77                 " coroutine=True" if coroutine else ""))
78        self._print_if(ifcond)
79        self._print_features(features)
80
81    def visit_event(self, name, info, ifcond, features, arg_type, boxed):
82        print('event %s %s' % (name, arg_type and arg_type.name))
83        print('    boxed=%s' % boxed)
84        self._print_if(ifcond)
85        self._print_features(features)
86
87    @staticmethod
88    def _print_variants(variants):
89        if variants:
90            print('    tag %s' % variants.tag_member.name)
91            for v in variants.variants:
92                print('    case %s: %s' % (v.name, v.type.name))
93                QAPISchemaTestVisitor._print_if(v.ifcond, indent=8)
94
95    @staticmethod
96    def _print_if(ifcond, indent=4):
97        # TODO Drop this hack after replacing OrderedDict by plain
98        # dict (requires Python 3.7)
99        def _massage(subcond):
100            if isinstance(subcond, str):
101                return subcond
102            if isinstance(subcond, list):
103                return [_massage(val) for val in subcond]
104            return {key: _massage(val) for key, val in subcond.items()}
105
106        if ifcond.is_present():
107            print('%sif %s' % (' ' * indent, _massage(ifcond.ifcond)))
108
109    @classmethod
110    def _print_features(cls, features, indent=4):
111        if features:
112            for f in features:
113                print('%sfeature %s' % (' ' * indent, f.name))
114                cls._print_if(f.ifcond, indent + 4)
115
116
117def test_frontend(fname):
118    schema = QAPISchema(fname)
119    schema.visit(QAPISchemaTestVisitor())
120
121    for doc in schema.docs:
122        if doc.symbol:
123            print('doc symbol=%s' % doc.symbol)
124        else:
125            print('doc freeform')
126        print('    body=\n%s' % doc.body.text)
127        for arg, section in doc.args.items():
128            print('    arg=%s\n%s' % (arg, section.text))
129        for feat, section in doc.features.items():
130            print('    feature=%s\n%s' % (feat, section.text))
131        for section in doc.sections:
132            print('    section=%s\n%s' % (section.name, section.text))
133
134
135def open_test_result(dir_name, file_name, update):
136    mode = 'r+' if update else 'r'
137    try:
138        fp = open(os.path.join(dir_name, file_name), mode)
139    except FileNotFoundError:
140        if not update:
141            raise
142        fp = open(os.path.join(dir_name, file_name), 'w+')
143    return fp
144
145
146def test_and_diff(test_name, dir_name, update):
147    sys.stdout = StringIO()
148    try:
149        test_frontend(os.path.join(dir_name, test_name + '.json'))
150    except QAPIError as err:
151        errstr = str(err) + '\n'
152        if dir_name:
153            errstr = errstr.replace(dir_name + '/', '')
154        actual_err = errstr.splitlines(True)
155    else:
156        actual_err = []
157    finally:
158        actual_out = sys.stdout.getvalue().splitlines(True)
159        sys.stdout.close()
160        sys.stdout = sys.__stdout__
161
162    try:
163        outfp = open_test_result(dir_name, test_name + '.out', update)
164        errfp = open_test_result(dir_name, test_name + '.err', update)
165        expected_out = outfp.readlines()
166        expected_err = errfp.readlines()
167    except OSError as err:
168        print("%s: can't open '%s': %s"
169              % (sys.argv[0], err.filename, err.strerror),
170              file=sys.stderr)
171        return 2
172
173    if actual_out == expected_out and actual_err == expected_err:
174        return 0
175
176    print("%s %s" % (test_name, 'UPDATE' if update else 'FAIL'),
177          file=sys.stderr)
178    out_diff = difflib.unified_diff(expected_out, actual_out, outfp.name)
179    err_diff = difflib.unified_diff(expected_err, actual_err, errfp.name)
180    sys.stdout.writelines(out_diff)
181    sys.stdout.writelines(err_diff)
182
183    if not update:
184        return 1
185
186    try:
187        outfp.truncate(0)
188        outfp.seek(0)
189        outfp.writelines(actual_out)
190        errfp.truncate(0)
191        errfp.seek(0)
192        errfp.writelines(actual_err)
193    except OSError as err:
194        print("%s: can't write '%s': %s"
195              % (sys.argv[0], err.filename, err.strerror),
196              file=sys.stderr)
197        return 2
198
199    return 0
200
201
202def main(argv):
203    parser = argparse.ArgumentParser(
204        description='QAPI schema tester')
205    parser.add_argument('-d', '--dir', action='store', default='',
206                        help="directory containing tests")
207    parser.add_argument('-u', '--update', action='store_true',
208                        help="update expected test results")
209    parser.add_argument('tests', nargs='*', metavar='TEST', action='store')
210    args = parser.parse_args()
211
212    status = 0
213    for t in args.tests:
214        (dir_name, base_name) = os.path.split(t)
215        dir_name = dir_name or args.dir
216        test_name = os.path.splitext(base_name)[0]
217        status |= test_and_diff(test_name, dir_name, args.update)
218
219    exit(status)
220
221
222if __name__ == '__main__':
223    main(sys.argv)
224    exit(0)
225