xref: /qemu/tests/qapi-schema/test-qapi.py (revision 69c22481) 
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_features(m.features, indent=8)
41        self._print_if(ifcond)
42        self._print_features(features)
43
44    def visit_array_type(self, name, info, ifcond, element_type):
45        if not info:
46            return              # suppress built-in arrays
47        print('array %s %s' % (name, element_type.name))
48        self._print_if(ifcond)
49
50    def visit_object_type(self, name, info, ifcond, features,
51                          base, members, variants):
52        print('object %s' % name)
53        if base:
54            print('    base %s' % base.name)
55        for m in members:
56            print('    member %s: %s optional=%s'
57                  % (m.name, m.type.name, m.optional))
58            self._print_if(m.ifcond, 8)
59            self._print_features(m.features, indent=8)
60        self._print_variants(variants)
61        self._print_if(ifcond)
62        self._print_features(features)
63
64    def visit_alternate_type(self, name, info, ifcond, features, variants):
65        print('alternate %s' % name)
66        self._print_variants(variants)
67        self._print_if(ifcond)
68        self._print_features(features)
69
70    def visit_command(self, name, info, ifcond, features,
71                      arg_type, ret_type, gen, success_response, boxed,
72                      allow_oob, allow_preconfig, coroutine):
73        print('command %s %s -> %s'
74              % (name, arg_type and arg_type.name,
75                 ret_type and ret_type.name))
76        print('    gen=%s success_response=%s boxed=%s oob=%s preconfig=%s%s'
77              % (gen, success_response, boxed, allow_oob, allow_preconfig,
78                 " coroutine=True" if coroutine else ""))
79        self._print_if(ifcond)
80        self._print_features(features)
81
82    def visit_event(self, name, info, ifcond, features, arg_type, boxed):
83        print('event %s %s' % (name, arg_type and arg_type.name))
84        print('    boxed=%s' % boxed)
85        self._print_if(ifcond)
86        self._print_features(features)
87
88    @staticmethod
89    def _print_variants(variants):
90        if variants:
91            print('    tag %s' % variants.tag_member.name)
92            for v in variants.variants:
93                print('    case %s: %s' % (v.name, v.type.name))
94                QAPISchemaTestVisitor._print_if(v.ifcond, indent=8)
95
96    @staticmethod
97    def _print_if(ifcond, indent=4):
98        # TODO Drop this hack after replacing OrderedDict by plain
99        # dict (requires Python 3.7)
100        def _massage(subcond):
101            if isinstance(subcond, str):
102                return subcond
103            if isinstance(subcond, list):
104                return [_massage(val) for val in subcond]
105            return {key: _massage(val) for key, val in subcond.items()}
106
107        if ifcond.is_present():
108            print('%sif %s' % (' ' * indent, _massage(ifcond.ifcond)))
109
110    @classmethod
111    def _print_features(cls, features, indent=4):
112        if features:
113            for f in features:
114                print('%sfeature %s' % (' ' * indent, f.name))
115                cls._print_if(f.ifcond, indent + 4)
116
117
118def test_frontend(fname):
119    schema = QAPISchema(fname)
120    schema.visit(QAPISchemaTestVisitor())
121
122    for doc in schema.docs:
123        if doc.symbol:
124            print('doc symbol=%s' % doc.symbol)
125        else:
126            print('doc freeform')
127        print('    body=\n%s' % doc.body.text)
128        for arg, section in doc.args.items():
129            print('    arg=%s\n%s' % (arg, section.text))
130        for feat, section in doc.features.items():
131            print('    feature=%s\n%s' % (feat, section.text))
132        for section in doc.sections:
133            print('    section=%s\n%s' % (section.name, section.text))
134
135
136def open_test_result(dir_name, file_name, update):
137    mode = 'r+' if update else 'r'
138    try:
139        return open(os.path.join(dir_name, file_name), mode, encoding='utf-8')
140    except FileNotFoundError:
141        if not update:
142            raise
143    return open(os.path.join(dir_name, file_name), 'w+', encoding='utf-8')
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                        default='QAPI_TEST_UPDATE' in os.environ,
209                        help="update expected test results")
210    parser.add_argument('tests', nargs='*', metavar='TEST', action='store')
211    args = parser.parse_args()
212
213    status = 0
214    for t in args.tests:
215        (dir_name, base_name) = os.path.split(t)
216        dir_name = dir_name or args.dir
217        test_name = os.path.splitext(base_name)[0]
218        status |= test_and_diff(test_name, dir_name, args.update)
219
220    sys.exit(status)
221
222
223if __name__ == '__main__':
224    main(sys.argv)
225    sys.exit(0)
226