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# Copyright 2017 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'spec_helper'
describe 'Server Interceptors' do
let(:interceptor) { TestServerInterceptor.new }
let(:request) { EchoMsg.new }
let(:trailing_metadata) { {} }
let(:service) { EchoService.new(trailing_metadata) }
let(:interceptors) { [] }
before(:each) do
build_rpc_server(server_opts: { interceptors: interceptors })
end
context 'when a server interceptor is added' do
let(:interceptors) { [interceptor] }
let(:client_metadata) { { client_md: 'test' } }
let(:client_call_opts) { { metadata: client_metadata, return_op: true } }
context 'with a request/response call' do
let(:trailing_metadata) { { server_om: 'from_request_response' } }
it 'should be called', server: true do
expect(interceptor).to receive(:request_response)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect(stub.an_rpc(request)).to be_a(EchoMsg)
end
end
it 'can modify trailing metadata', server: true do
expect(interceptor).to receive(:request_response)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect_any_instance_of(GRPC::ActiveCall).to(
receive(:request_response).with(request, metadata: client_metadata)
.once.and_call_original
)
op = stub.an_rpc(request, client_call_opts)
msg = op.execute
expect(op.trailing_metadata).to eq(
'interc' => 'from_request_response',
'server_om' => 'from_request_response'
)
expect(msg).to be_a(EchoMsg)
end
end
end
context 'with a client streaming call' do
let(:trailing_metadata) { { server_om: 'from_client_streamer' } }
let(:requests) { [EchoMsg.new, EchoMsg.new] }
it 'should be called', server: true do
expect(interceptor).to receive(:client_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect(stub.a_client_streaming_rpc(requests)).to be_a(EchoMsg)
end
end
it 'can modify trailing metadata', server: true do
expect(interceptor).to receive(:client_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect_any_instance_of(GRPC::ActiveCall).to(
receive(:client_streamer).with(requests)
.once.and_call_original
)
op = stub.a_client_streaming_rpc(requests, client_call_opts)
msg = op.execute
expect(op.trailing_metadata).to eq(
'interc' => 'from_client_streamer',
'server_om' => 'from_client_streamer'
)
expect(msg).to be_a(EchoMsg)
end
end
end
context 'with a server streaming call' do
let(:trailing_metadata) { { server_om: 'from_server_streamer' } }
let(:request) { EchoMsg.new }
it 'should be called', server: true do
expect(interceptor).to receive(:server_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
responses = stub.a_server_streaming_rpc(request)
responses.each do |r|
expect(r).to be_a(EchoMsg)
end
end
end
it 'can modify trailing metadata', server: true do
expect(interceptor).to receive(:server_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect_any_instance_of(GRPC::ActiveCall).to(
receive(:server_streamer).with(request)
.once.and_call_original
)
op = stub.a_server_streaming_rpc(request, client_call_opts)
responses = op.execute
responses.each do |r|
expect(r).to be_a(EchoMsg)
end
expect(op.trailing_metadata).to eq(
'interc' => 'from_server_streamer',
'server_om' => 'from_server_streamer'
)
end
end
end
context 'with a bidi call' do
let(:trailing_metadata) { { server_om: 'from_bidi_streamer' } }
let(:requests) { [EchoMsg.new, EchoMsg.new] }
it 'should be called', server: true do
expect(interceptor).to receive(:bidi_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
responses = stub.a_bidi_rpc(requests)
responses.each do |r|
expect(r).to be_a(EchoMsg)
end
end
end
it 'can modify trailing metadata', server: true do
expect(interceptor).to receive(:bidi_streamer)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect_any_instance_of(GRPC::ActiveCall).to(
receive(:bidi_streamer).with(requests)
.once.and_call_original
)
op = stub.a_bidi_rpc(requests, client_call_opts)
responses = op.execute
responses.each do |r|
expect(r).to be_a(EchoMsg)
end
expect(op.trailing_metadata).to eq(
'interc' => 'from_bidi_streamer',
'server_om' => 'from_bidi_streamer'
)
end
end
end
end
context 'when multiple interceptors are added' do
let(:interceptor2) { TestServerInterceptor.new }
let(:interceptor3) { TestServerInterceptor.new }
let(:interceptors) do
[
interceptor,
interceptor2,
interceptor3
]
end
it 'each should be called', server: true do
expect(interceptor).to receive(:request_response)
.once.and_call_original
expect(interceptor2).to receive(:request_response)
.once.and_call_original
expect(interceptor3).to receive(:request_response)
.once.and_call_original
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect(stub.an_rpc(request)).to be_a(EchoMsg)
end
end
end
context 'when an interceptor is not added' do
it 'should not be called', server: true do
expect(interceptor).to_not receive(:call)
run_services_on_server(@server, services: [service]) do
stub = build_insecure_stub(EchoStub)
expect(stub.an_rpc(request)).to be_a(EchoMsg)
end
end
end
end
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