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 <string.h>
20
21 #include <memory>
22
23 #include "absl/status/status.h"
24 #include "gtest/gtest.h"
25
26 #include <grpc/grpc.h>
27 #include <grpc/impl/propagation_bits.h>
28 #include <grpc/slice.h>
29 #include <grpc/status.h>
30 #include <grpc/support/alloc.h>
31
32 #include "src/core/lib/channel/channel_fwd.h"
33 #include "src/core/lib/channel/channel_stack.h"
34 #include "src/core/lib/experiments/experiments.h"
35 #include "src/core/lib/gprpp/orphanable.h"
36 #include "src/core/lib/iomgr/closure.h"
37 #include "src/core/lib/iomgr/error.h"
38 #include "src/core/lib/iomgr/exec_ctx.h"
39 #include "src/core/lib/surface/channel.h"
40 #include "src/core/lib/transport/connectivity_state.h"
41 #include "src/core/lib/transport/transport.h"
42 #include "test/core/end2end/cq_verifier.h"
43 #include "test/core/util/test_config.h"
44
45 class Watcher : public grpc_core::ConnectivityStateWatcherInterface {
46 public:
Notify(grpc_connectivity_state new_state,const absl::Status &)47 void Notify(grpc_connectivity_state new_state,
48 const absl::Status& /* status */) override {
49 ASSERT_EQ(new_state, GRPC_CHANNEL_SHUTDOWN);
50 }
51 };
52
53 static grpc_closure transport_op_cb;
54
do_nothing(void *,grpc_error_handle)55 static void do_nothing(void* /*arg*/, grpc_error_handle /*error*/) {}
56
test_transport_op(grpc_channel * channel)57 void test_transport_op(grpc_channel* channel) {
58 grpc_core::ExecCtx exec_ctx;
59 grpc_transport_op* op = grpc_make_transport_op(nullptr);
60 op->start_connectivity_watch = grpc_core::MakeOrphanable<Watcher>();
61 grpc_channel_element* elem = grpc_channel_stack_element(
62 grpc_core::Channel::FromC(channel)->channel_stack(), 0);
63 elem->filter->start_transport_op(elem, op);
64
65 GRPC_CLOSURE_INIT(&transport_op_cb, do_nothing, nullptr,
66 grpc_schedule_on_exec_ctx);
67 op = grpc_make_transport_op(&transport_op_cb);
68 elem->filter->start_transport_op(elem, op);
69 }
70
TEST(LameClientTest,MainTest)71 TEST(LameClientTest, MainTest) {
72 grpc_channel* chan;
73 grpc_call* call;
74 grpc_completion_queue* cq;
75 grpc_op ops[6];
76 grpc_op* op;
77 grpc_metadata_array initial_metadata_recv;
78 grpc_metadata_array trailing_metadata_recv;
79 grpc_status_code status;
80 grpc_call_error error;
81 grpc_slice details;
82 char* peer;
83
84 grpc_init();
85
86 grpc_metadata_array_init(&initial_metadata_recv);
87 grpc_metadata_array_init(&trailing_metadata_recv);
88
89 const char* error_message = "Rpc sent on a lame channel.";
90 grpc_status_code error_code = GRPC_STATUS_ABORTED;
91 chan = grpc_lame_client_channel_create("lampoon:national", error_code,
92 error_message);
93 ASSERT_TRUE(chan);
94
95 test_transport_op(chan);
96
97 ASSERT_EQ(GRPC_CHANNEL_TRANSIENT_FAILURE,
98 grpc_channel_check_connectivity_state(chan, 0));
99
100 cq = grpc_completion_queue_create_for_next(nullptr);
101
102 grpc_slice host = grpc_slice_from_static_string("anywhere");
103 call =
104 grpc_channel_create_call(chan, nullptr, GRPC_PROPAGATE_DEFAULTS, cq,
105 grpc_slice_from_static_string("/Foo"), &host,
106 grpc_timeout_seconds_to_deadline(100), nullptr);
107 ASSERT_TRUE(call);
108 grpc_core::CqVerifier cqv(cq);
109
110 memset(ops, 0, sizeof(ops));
111 op = ops;
112 op->op = GRPC_OP_SEND_INITIAL_METADATA;
113 op->data.send_initial_metadata.count = 0;
114 op->flags = 0;
115 op->reserved = nullptr;
116 op++;
117 op->op = GRPC_OP_RECV_INITIAL_METADATA;
118 op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
119 op->flags = 0;
120 op->reserved = nullptr;
121 op++;
122 error = grpc_call_start_batch(call, ops, static_cast<size_t>(op - ops),
123 grpc_core::CqVerifier::tag(1), nullptr);
124 ASSERT_EQ(GRPC_CALL_OK, error);
125
126 // Filter stack code considers this a failed to receive initial metadata
127 // result, where as promise based code interprets this as a trailers only
128 // failed request. Both are rational interpretations, so we accept the one
129 // that is implemented for each stack.
130 cqv.Expect(grpc_core::CqVerifier::tag(1),
131 grpc_core::IsPromiseBasedClientCallEnabled());
132 cqv.Verify();
133
134 memset(ops, 0, sizeof(ops));
135 op = ops;
136 op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
137 op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
138 op->data.recv_status_on_client.status = &status;
139 op->data.recv_status_on_client.status_details = &details;
140 op->flags = 0;
141 op->reserved = nullptr;
142 op++;
143 error = grpc_call_start_batch(call, ops, static_cast<size_t>(op - ops),
144 grpc_core::CqVerifier::tag(2), nullptr);
145 ASSERT_EQ(GRPC_CALL_OK, error);
146
147 // the call should immediately fail
148 cqv.Expect(grpc_core::CqVerifier::tag(2), true);
149 cqv.Verify();
150
151 peer = grpc_call_get_peer(call);
152 ASSERT_STREQ(peer, "lampoon:national");
153 gpr_free(peer);
154
155 ASSERT_EQ(status, error_code);
156 ASSERT_EQ(grpc_slice_str_cmp(details, error_message), 0);
157
158 grpc_call_unref(call);
159 grpc_channel_destroy(chan);
160 grpc_completion_queue_destroy(cq);
161
162 grpc_metadata_array_destroy(&initial_metadata_recv);
163 grpc_metadata_array_destroy(&trailing_metadata_recv);
164 grpc_slice_unref(details);
165
166 grpc_shutdown();
167 }
168
main(int argc,char ** argv)169 int main(int argc, char** argv) {
170 grpc::testing::TestEnvironment env(&argc, argv);
171 ::testing::InitGoogleTest(&argc, argv);
172 return RUN_ALL_TESTS();
173 }
174