Initial checkin of gRPC to third_party/

third_party/grpc/src/ruby/spec/generic/client_stub_spec.rb

Index: third_party/grpc/src/ruby/spec/generic/client_stub_spec.rb
diff --git a/third_party/grpc/src/ruby/spec/generic/client_stub_spec.rb b/third_party/grpc/src/ruby/spec/generic/client_stub_spec.rb
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+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'grpc'
+
+def wakey_thread(&blk)
+  n = GRPC::Notifier.new
+  t = Thread.new do
+    blk.call(n)
+  end
+  n.wait
+  t
+end
+
+def load_test_certs
+  test_root = File.join(File.dirname(File.dirname(__FILE__)), 'testdata')
+  files = ['ca.pem', 'server1.key', 'server1.pem']
+  files.map { |f| File.open(File.join(test_root, f)).read }
+end
+
+include GRPC::Core::StatusCodes
+include GRPC::Core::TimeConsts
+include GRPC::Core::CallOps
+
+describe 'ClientStub' do
+  let(:noop) { proc { |x| x } }
+
+  before(:each) do
+    Thread.abort_on_exception = true
+    @server = nil
+    @server_queue = nil
+    @method = 'an_rpc_method'
+    @pass = OK
+    @fail = INTERNAL
+    @cq = GRPC::Core::CompletionQueue.new
+  end
+
+  after(:each) do
+    @server.close(@server_queue) unless @server_queue.nil?
+  end
+
+  describe '#new' do
+    let(:fake_host) { 'localhost:0' }
+    it 'can be created from a host and args' do
+      opts = { a_channel_arg: 'an_arg' }
+      blk = proc do
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
+      end
+      expect(&blk).not_to raise_error
+    end
+
+    it 'can be created with a default deadline' do
+      opts = { a_channel_arg: 'an_arg', deadline: 5 }
+      blk = proc do
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
+      end
+      expect(&blk).not_to raise_error
+    end
+
+    it 'can be created with an channel override' do
+      opts = { a_channel_arg: 'an_arg', channel_override: @ch }
+      blk = proc do
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
+      end
+      expect(&blk).not_to raise_error
+    end
+
+    it 'cannot be created with a bad channel override' do
+      blk = proc do
+        opts = { a_channel_arg: 'an_arg', channel_override: Object.new }
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
+      end
+      expect(&blk).to raise_error
+    end
+
+    it 'cannot be created with bad credentials' do
+      blk = proc do
+        opts = { a_channel_arg: 'an_arg' }
+        GRPC::ClientStub.new(fake_host, @cq, Object.new, **opts)
+      end
+      expect(&blk).to raise_error
+    end
+
+    it 'can be created with test test credentials' do
+      certs = load_test_certs
+      blk = proc do
+        opts = {
+          GRPC::Core::Channel::SSL_TARGET => 'foo.test.google.fr',
+          a_channel_arg: 'an_arg'
+        }
+        creds = GRPC::Core::ChannelCredentials.new(certs[0], nil, nil)
+        GRPC::ClientStub.new(fake_host, @cq, creds,  **opts)
+      end
+      expect(&blk).to_not raise_error
+    end
+  end
+
+  describe '#request_response' do
+    before(:each) do
+      @sent_msg, @resp = 'a_msg', 'a_reply'
+    end
+
+    shared_examples 'request response' do
+      it 'should send a request to/receive a reply from a server' do
+        server_port = create_test_server
+        th = run_request_response(@sent_msg, @resp, @pass)
+        stub = GRPC::ClientStub.new("localhost:#{server_port}", @cq,
+                                    :this_channel_is_insecure)
+        expect(get_response(stub)).to eq(@resp)
+        th.join
+      end
+
+      it 'should send metadata to the server ok' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_request_response(@sent_msg, @resp, @pass,
+                                  k1: 'v1', k2: 'v2')
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        expect(get_response(stub)).to eq(@resp)
+        th.join
+      end
+
+      it 'should send a request when configured using an override channel' do
+        server_port = create_test_server
+        alt_host = "localhost:#{server_port}"
+        th = run_request_response(@sent_msg, @resp, @pass)
+        ch = GRPC::Core::Channel.new(alt_host, nil, :this_channel_is_insecure)
+        stub = GRPC::ClientStub.new('ignored-host', @cq,
+                                    :this_channel_is_insecure,
+                                    channel_override: ch)
+        expect(get_response(stub)).to eq(@resp)
+        th.join
+      end
+
+      it 'should raise an error if the status is not OK' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_request_response(@sent_msg, @resp, @fail)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        blk = proc { get_response(stub) }
+        expect(&blk).to raise_error(GRPC::BadStatus)
+        th.join
+      end
+    end
+
+    describe 'without a call operation' do
+      def get_response(stub)
+        stub.request_response(@method, @sent_msg, noop, noop,
+                              k1: 'v1', k2: 'v2')
+      end
+
+      it_behaves_like 'request response'
+    end
+
+    describe 'via a call operation' do
+      def get_response(stub)
+        op = stub.request_response(@method, @sent_msg, noop, noop,
+                                   return_op: true, k1: 'v1', k2: 'v2')
+        expect(op).to be_a(GRPC::ActiveCall::Operation)
+        op.execute
+      end
+
+      it_behaves_like 'request response'
+    end
+  end
+
+  describe '#client_streamer' do
+    shared_examples 'client streaming' do
+      before(:each) do
+        @sent_msgs = Array.new(3) { |i| 'msg_' + (i + 1).to_s }
+        @resp = 'a_reply'
+      end
+
+      it 'should send requests to/receive a reply from a server' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_client_streamer(@sent_msgs, @resp, @pass)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        expect(get_response(stub)).to eq(@resp)
+        th.join
+      end
+
+      it 'should send metadata to the server ok' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_client_streamer(@sent_msgs, @resp, @pass,
+                                 k1: 'v1', k2: 'v2')
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        expect(get_response(stub)).to eq(@resp)
+        th.join
+      end
+
+      it 'should raise an error if the status is not ok' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_client_streamer(@sent_msgs, @resp, @fail)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        blk = proc { get_response(stub) }
+        expect(&blk).to raise_error(GRPC::BadStatus)
+        th.join
+      end
+    end
+
+    describe 'without a call operation' do
+      def get_response(stub)
+        stub.client_streamer(@method, @sent_msgs, noop, noop,
+                             k1: 'v1', k2: 'v2')
+      end
+
+      it_behaves_like 'client streaming'
+    end
+
+    describe 'via a call operation' do
+      def get_response(stub)
+        op = stub.client_streamer(@method, @sent_msgs, noop, noop,
+                                  return_op: true, k1: 'v1', k2: 'v2')
+        expect(op).to be_a(GRPC::ActiveCall::Operation)
+        op.execute
+      end
+
+      it_behaves_like 'client streaming'
+    end
+  end
+
+  describe '#server_streamer' do
+    shared_examples 'server streaming' do
+      before(:each) do
+        @sent_msg = 'a_msg'
+        @replys = Array.new(3) { |i| 'reply_' + (i + 1).to_s }
+      end
+
+      it 'should send a request to/receive replies from a server' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_server_streamer(@sent_msg, @replys, @pass)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        expect(get_responses(stub).collect { |r| r }).to eq(@replys)
+        th.join
+      end
+
+      it 'should raise an error if the status is not ok' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_server_streamer(@sent_msg, @replys, @fail)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        e = get_responses(stub)
+        expect { e.collect { |r| r } }.to raise_error(GRPC::BadStatus)
+        th.join
+      end
+
+      it 'should send metadata to the server ok' do
+        server_port = create_test_server
+        host = "localhost:#{server_port}"
+        th = run_server_streamer(@sent_msg, @replys, @fail,
+                                 k1: 'v1', k2: 'v2')
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
+        e = get_responses(stub)
+        expect { e.collect { |r| r } }.to raise_error(GRPC::BadStatus)
+        th.join
+      end
+    end
+
+    describe 'without a call operation' do
+      def get_responses(stub)
+        e = stub.server_streamer(@method, @sent_msg, noop, noop,
+                                 k1: 'v1', k2: 'v2')
+        expect(e).to be_a(Enumerator)
+        e
+      end
+
+      it_behaves_like 'server streaming'
+    end
+
+    describe 'via a call operation' do
+      def get_responses(stub)
+        op = stub.server_streamer(@method, @sent_msg, noop, noop,
+                                  return_op: true, k1: 'v1', k2: 'v2')
+        expect(op).to be_a(GRPC::ActiveCall::Operation)
+        e = op.execute
+        expect(e).to be_a(Enumerator)
+        e
+      end
+
+      it_behaves_like 'server streaming'
+    end
+  end
+
+  describe '#bidi_streamer' do
+    shared_examples 'bidi streaming' do
+      before(:each) do
+        @sent_msgs = Array.new(3) { |i| 'msg_' + (i + 1).to_s }
+        @replys = Array.new(3) { |i| 'reply_' + (i + 1).to_s }
+        server_port = create_test_server
+        @host = "localhost:#{server_port}"
+      end
+
+      it 'supports sending all the requests first', bidi: true do
+        th = run_bidi_streamer_handle_inputs_first(@sent_msgs, @replys,
+                                                   @pass)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
+        e = get_responses(stub)
+        expect(e.collect { |r| r }).to eq(@replys)
+        th.join
+      end
+
+      it 'supports client-initiated ping pong', bidi: true do
+        th = run_bidi_streamer_echo_ping_pong(@sent_msgs, @pass, true)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
+        e = get_responses(stub)
+        expect(e.collect { |r| r }).to eq(@sent_msgs)
+        th.join
+      end
+
+      it 'supports a server-initiated ping pong', bidi: true do
+        th = run_bidi_streamer_echo_ping_pong(@sent_msgs, @pass, false)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
+        e = get_responses(stub)
+        expect(e.collect { |r| r }).to eq(@sent_msgs)
+        th.join
+      end
+    end
+
+    describe 'without a call operation' do
+      def get_responses(stub)
+        e = stub.bidi_streamer(@method, @sent_msgs, noop, noop)
+        expect(e).to be_a(Enumerator)
+        e
+      end
+
+      it_behaves_like 'bidi streaming'
+    end
+
+    describe 'via a call operation' do
+      def get_responses(stub)
+        op = stub.bidi_streamer(@method, @sent_msgs, noop, noop,
+                                return_op: true)
+        expect(op).to be_a(GRPC::ActiveCall::Operation)
+        e = op.execute
+        expect(e).to be_a(Enumerator)
+        e
+      end
+
+      it_behaves_like 'bidi streaming'
+    end
+
+    describe 'without enough time to run' do
+      before(:each) do
+        @sent_msgs = Array.new(3) { |i| 'msg_' + (i + 1).to_s }
+        @replys = Array.new(3) { |i| 'reply_' + (i + 1).to_s }
+        server_port = create_test_server
+        @host = "localhost:#{server_port}"
+      end
+
+      it 'should fail with DeadlineExceeded', bidi: true do
+        @server.start
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
+        blk = proc do
+          e = stub.bidi_streamer(@method, @sent_msgs, noop, noop,
+                                 timeout: 0.001)
+          e.collect { |r| r }
+        end
+        expect(&blk).to raise_error GRPC::BadStatus, /Deadline Exceeded/
+      end
+    end
+  end
+
+  def run_server_streamer(expected_input, replys, status, **kw)
+    wanted_metadata = kw.clone
+    wakey_thread do |notifier|
+      c = expect_server_to_be_invoked(notifier)
+      wanted_metadata.each do |k, v|
+        expect(c.metadata[k.to_s]).to eq(v)
+      end
+      expect(c.remote_read).to eq(expected_input)
+      replys.each { |r| c.remote_send(r) }
+      c.send_status(status, status == @pass ? 'OK' : 'NOK', true)
+    end
+  end
+
+  def run_bidi_streamer_handle_inputs_first(expected_inputs, replys,
+                                            status)
+    wakey_thread do |notifier|
+      c = expect_server_to_be_invoked(notifier)
+      expected_inputs.each { |i| expect(c.remote_read).to eq(i) }
+      replys.each { |r| c.remote_send(r) }
+      c.send_status(status, status == @pass ? 'OK' : 'NOK', true)
+    end
+  end
+
+  def run_bidi_streamer_echo_ping_pong(expected_inputs, status, client_starts)
+    wakey_thread do |notifier|
+      c = expect_server_to_be_invoked(notifier)
+      expected_inputs.each do |i|
+        if client_starts
+          expect(c.remote_read).to eq(i)
+          c.remote_send(i)
+        else
+          c.remote_send(i)
+          expect(c.remote_read).to eq(i)
+        end
+      end
+      c.send_status(status, status == @pass ? 'OK' : 'NOK', true)
+    end
+  end
+
+  def run_client_streamer(expected_inputs, resp, status, **kw)
+    wanted_metadata = kw.clone
+    wakey_thread do |notifier|
+      c = expect_server_to_be_invoked(notifier)
+      expected_inputs.each { |i| expect(c.remote_read).to eq(i) }
+      wanted_metadata.each do |k, v|
+        expect(c.metadata[k.to_s]).to eq(v)
+      end
+      c.remote_send(resp)
+      c.send_status(status, status == @pass ? 'OK' : 'NOK', true)
+    end
+  end
+
+  def run_request_response(expected_input, resp, status, **kw)
+    wanted_metadata = kw.clone
+    wakey_thread do |notifier|
+      c = expect_server_to_be_invoked(notifier)
+      expect(c.remote_read).to eq(expected_input)
+      wanted_metadata.each do |k, v|
+        expect(c.metadata[k.to_s]).to eq(v)
+      end
+      c.remote_send(resp)
+      c.send_status(status, status == @pass ? 'OK' : 'NOK', true)
+    end
+  end
+
+  def create_test_server
+    @server_queue = GRPC::Core::CompletionQueue.new
+    @server = GRPC::Core::Server.new(@server_queue, nil)
+    @server.add_http2_port('0.0.0.0:0', :this_port_is_insecure)
+  end
+
+  def expect_server_to_be_invoked(notifier)
+    @server.start
+    notifier.notify(nil)
+    server_tag = Object.new
+    recvd_rpc = @server.request_call(@server_queue, server_tag,
+                                     INFINITE_FUTURE)
+    recvd_call = recvd_rpc.call
+    recvd_call.metadata = recvd_rpc.metadata
+    recvd_call.run_batch(@server_queue, server_tag, Time.now + 2,
+                         SEND_INITIAL_METADATA => nil)
+    GRPC::ActiveCall.new(recvd_call, @server_queue, noop, noop, INFINITE_FUTURE)
+  end
+end