1 //
2 //
3 // Copyright 2015 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18
19 #include <memory>
20 #include <string>
21 #include <utility>
22
23 #include "absl/log/log.h"
24 #include "absl/status/status.h"
25 #include "absl/status/statusor.h"
26 #include "absl/strings/string_view.h"
27 #include "gtest/gtest.h"
28 #include "src/core/config/config_vars.h"
29 #include "src/core/config/core_configuration.h"
30 #include "src/core/lib/channel/channel_args.h"
31 #include "src/core/lib/event_engine/default_event_engine.h"
32 #include "src/core/lib/iomgr/exec_ctx.h"
33 #include "src/core/resolver/resolver.h"
34 #include "src/core/resolver/resolver_factory.h"
35 #include "src/core/resolver/resolver_registry.h"
36 #include "src/core/util/orphanable.h"
37 #include "src/core/util/uri.h"
38 #include "src/core/util/work_serializer.h"
39 #include "test/core/test_util/test_config.h"
40
41 using ::grpc_event_engine::experimental::GetDefaultEventEngine;
42
43 static std::shared_ptr<grpc_core::WorkSerializer>* g_work_serializer;
44
45 class TestResultHandler : public grpc_core::Resolver::ResultHandler {
ReportResult(grpc_core::Resolver::Result)46 void ReportResult(grpc_core::Resolver::Result /*result*/) override {}
47 };
48
test_succeeds(grpc_core::ResolverFactory * factory,const char * string)49 static void test_succeeds(grpc_core::ResolverFactory* factory,
50 const char* string) {
51 VLOG(2) << "test: '" << string << "' should be valid for '"
52 << factory->scheme() << "'";
53 grpc_core::ExecCtx exec_ctx;
54 absl::StatusOr<grpc_core::URI> uri = grpc_core::URI::Parse(string);
55 if (!uri.ok()) {
56 FAIL() << "Error: " << uri.status().ToString();
57 }
58 grpc_core::ResolverArgs args;
59 args.uri = std::move(*uri);
60 args.work_serializer = *g_work_serializer;
61 args.result_handler = std::make_unique<TestResultHandler>();
62 args.args = args.args.SetObject(GetDefaultEventEngine());
63 grpc_core::OrphanablePtr<grpc_core::Resolver> resolver =
64 factory->CreateResolver(std::move(args));
65 ASSERT_NE(resolver, nullptr);
66 }
67
test_fails(grpc_core::ResolverFactory * factory,const char * string)68 static void test_fails(grpc_core::ResolverFactory* factory,
69 const char* string) {
70 VLOG(2) << "test: '" << string << "' should be invalid for '"
71 << factory->scheme() << "'";
72 grpc_core::ExecCtx exec_ctx;
73 absl::StatusOr<grpc_core::URI> uri = grpc_core::URI::Parse(string);
74 if (!uri.ok()) {
75 FAIL() << "Error: " << uri.status().ToString();
76 }
77 grpc_core::ResolverArgs args;
78 args.uri = std::move(*uri);
79 args.work_serializer = *g_work_serializer;
80 args.result_handler = std::make_unique<TestResultHandler>();
81 args.args = args.args.SetObject(GetDefaultEventEngine());
82 grpc_core::OrphanablePtr<grpc_core::Resolver> resolver =
83 factory->CreateResolver(std::move(args));
84 ASSERT_EQ(resolver, nullptr);
85 }
86
TEST(DnsResolverTest,MainTest)87 TEST(DnsResolverTest, MainTest) {
88 auto work_serializer = std::make_shared<grpc_core::WorkSerializer>(
89 grpc_event_engine::experimental::GetDefaultEventEngine());
90 g_work_serializer = &work_serializer;
91
92 grpc_core::ResolverFactory* dns = grpc_core::CoreConfiguration::Get()
93 .resolver_registry()
94 .LookupResolverFactory("dns");
95
96 test_succeeds(dns, "dns:10.2.1.1");
97 test_succeeds(dns, "dns:10.2.1.1:1234");
98 test_succeeds(dns, "dns:www.google.com");
99 test_succeeds(dns, "dns:///www.google.com");
100 if (grpc_core::ConfigVars::Get().DnsResolver() == "native") {
101 test_fails(dns, "dns://8.8.8.8/8.8.8.8:8888");
102 } else {
103 test_succeeds(dns, "dns://8.8.8.8/8.8.8.8:8888");
104 }
105 }
106
main(int argc,char ** argv)107 int main(int argc, char** argv) {
108 grpc::testing::TestEnvironment env(&argc, argv);
109 ::testing::InitGoogleTest(&argc, argv);
110 grpc::testing::TestGrpcScope grpc_scope;
111 return RUN_ALL_TESTS();
112 }
113