2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/experimental/bser/Bser.h>
19 #include <folly/String.h>
20 #include <folly/portability/GTest.h>
24 static const dynamic roundtrips[] = {
26 std::numeric_limits<int8_t>::max(),
27 std::numeric_limits<int16_t>::max(),
28 std::numeric_limits<int32_t>::max(),
29 std::numeric_limits<int64_t>::max(),
30 std::numeric_limits<int8_t>::min(),
31 std::numeric_limits<int16_t>::min(),
32 std::numeric_limits<int32_t>::min(),
33 std::numeric_limits<int64_t>::min(),
39 folly::dynamic::array(1, 2, 3),
40 dynamic::object("key", "value")("otherkey", "otherval"),
43 // Here's a blob from the watchman test suite
44 const uint8_t template_blob[] =
46 "\x0b\x00\x03\x02\x02\x03\x04\x6e\x61\x6d\x65\x02"
47 "\x03\x03\x61\x67\x65\x03\x03\x02\x03\x04\x66\x72"
48 "\x65\x64\x03\x14\x02\x03\x04\x70\x65\x74\x65\x03"
51 // and here's what it represents
52 static const dynamic template_dynamic = folly::dynamic::array(
53 dynamic::object("name", "fred")("age", 20),
54 dynamic::object("name", "pete")("age", 30),
55 dynamic::object("name", nullptr)("age", 25));
57 TEST(Bser, RoundTrip) {
58 dynamic decoded(nullptr);
61 for (const auto& dyn : roundtrips) {
63 str = folly::bser::toBser(dyn, folly::bser::serialization_opts());
64 decoded = folly::bser::parseBser(str);
66 EXPECT_EQ(decoded, dyn);
67 } catch (const std::exception& err) {
68 LOG(ERROR) << err.what() << "\nInput: " << dyn.typeName() << ": " << dyn
69 << " decoded back as " << decoded.typeName() << ": " << decoded
71 << folly::hexDump(str.data(), str.size());
77 TEST(Bser, Template) {
78 dynamic decoded(nullptr);
80 // Decode the template value provided from elsewhere
81 decoded = folly::bser::parseBser(
82 folly::ByteRange(template_blob, sizeof(template_blob) - 1));
83 EXPECT_EQ(decoded, template_dynamic)
84 << "Didn't load template value.\n"
85 << "Input: " << template_dynamic.typeName() << ": " << template_dynamic
86 << " decoded back as " << decoded.typeName() << ": " << decoded << "\n"
87 << folly::hexDump(template_blob, sizeof(template_blob) - 1);
89 // Now check that we can generate this same data representation
90 folly::bser::serialization_opts opts;
91 folly::bser::serialization_opts::TemplateMap templates = {std::make_pair(
92 &decoded, folly::dynamic(folly::dynamic::array("name", "age")))};
93 opts.templates = templates;
95 str = folly::bser::toBser(decoded, opts);
97 folly::ByteRange((const uint8_t*)str.data(), str.size()),
98 folly::ByteRange(template_blob, sizeof(template_blob) - 1))
100 << folly::hexDump(template_blob, sizeof(template_blob) - 1) << "\nGot:\n"
101 << folly::hexDump(str.data(), str.size());
104 TEST(Bser, PduLength) {
107 // Try to decode PDU for a short buffer that doesn't even have the
108 // complete length available
109 auto buf = folly::IOBuf::wrapBuffer(template_blob, 3);
110 auto len = folly::bser::decodePduLength(&*buf);
112 LOG(ERROR) << "managed to return a length, but only had 3 bytes";
116 auto buf = folly::IOBuf::wrapBuffer(template_blob, sizeof(template_blob));
117 auto len = folly::bser::decodePduLength(&*buf);
118 EXPECT_EQ(len, 44) << "PduLength should be 44, got " << len;