Initial checkin of gRPC to third_party/

third_party/grpc/src/ruby/spec/client_server_spec.rb

Index: third_party/grpc/src/ruby/spec/client_server_spec.rb
diff --git a/third_party/grpc/src/ruby/spec/client_server_spec.rb b/third_party/grpc/src/ruby/spec/client_server_spec.rb
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+# Copyright 2015-2016, 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'
+
+include GRPC::Core
+
+shared_context 'setup: tags' do
+  let(:sent_message) { 'sent message' }
+  let(:reply_text) { 'the reply' }
+  before(:example) do
+    @client_tag = Object.new
+    @server_tag = Object.new
+  end
+
+  def deadline
+    Time.now + 5
+  end
+
+  def server_allows_client_to_proceed
+    recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+    expect(recvd_rpc).to_not eq nil
+    server_call = recvd_rpc.call
+    ops = { CallOps::SEND_INITIAL_METADATA => {} }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline, ops)
+    expect(svr_batch.send_metadata).to be true
+    server_call
+  end
+
+  def new_client_call
+    @ch.create_call(@client_queue, nil, nil, '/method', nil, deadline)
+  end
+end
+
+shared_examples 'basic GRPC message delivery is OK' do
+  include GRPC::Core
+  include_context 'setup: tags'
+
+  context 'the test channel' do
+    it 'should have a target' do
+      expect(@ch.target).to be_a(String)
+    end
+  end
+
+  context 'a client call' do
+    it 'should have a peer' do
+      expect(new_client_call.peer).to be_a(String)
+    end
+  end
+
+  it 'calls have peer info' do
+    call = new_client_call
+    expect(call.peer).to be_a(String)
+  end
+
+  it 'servers receive requests from clients and can respond' do
+    call = new_client_call
+    server_call = nil
+
+    server_thread = Thread.new do
+      server_call = server_allows_client_to_proceed
+    end
+
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => {},
+      CallOps::SEND_MESSAGE => sent_message
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+    expect(batch_result.send_message).to be true
+
+    # confirm the server can read the inbound message
+    server_thread.join
+    server_ops = {
+      CallOps::RECV_MESSAGE => nil
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.message).to eq(sent_message)
+  end
+
+  it 'responses written by servers are received by the client' do
+    call = new_client_call
+    server_call = nil
+
+    server_thread = Thread.new do
+      server_call = server_allows_client_to_proceed
+    end
+
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => {},
+      CallOps::SEND_MESSAGE => sent_message
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+    expect(batch_result.send_message).to be true
+
+    # confirm the server can read the inbound message
+    server_thread.join
+    server_ops = {
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::SEND_MESSAGE => reply_text
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.message).to eq(sent_message)
+    expect(svr_batch.send_message).to be true
+  end
+
+  it 'servers can ignore a client write and send a status' do
+    call = new_client_call
+    server_call = nil
+
+    server_thread = Thread.new do
+      server_call = server_allows_client_to_proceed
+    end
+
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => {},
+      CallOps::SEND_MESSAGE => sent_message
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+    expect(batch_result.send_message).to be true
+
+    # confirm the server can read the inbound message
+    the_status = Struct::Status.new(StatusCodes::OK, 'OK')
+    server_thread.join
+    server_ops = {
+      CallOps::SEND_STATUS_FROM_SERVER => the_status
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.message).to eq nil
+    expect(svr_batch.send_status).to be true
+  end
+
+  it 'completes calls by sending status to client and server' do
+    call = new_client_call
+    server_call = nil
+
+    server_thread = Thread.new do
+      server_call = server_allows_client_to_proceed
+    end
+
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => {},
+      CallOps::SEND_MESSAGE => sent_message
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+    expect(batch_result.send_message).to be true
+
+    # confirm the server can read the inbound message and respond
+    the_status = Struct::Status.new(StatusCodes::OK, 'OK', {})
+    server_thread.join
+    server_ops = {
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::SEND_MESSAGE => reply_text,
+      CallOps::SEND_STATUS_FROM_SERVER => the_status
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.message).to eq sent_message
+    expect(svr_batch.send_status).to be true
+    expect(svr_batch.send_message).to be true
+
+    # confirm the client can receive the server response and status.
+    client_ops = {
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil,
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::RECV_STATUS_ON_CLIENT => nil
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_close).to be true
+    expect(batch_result.message).to eq reply_text
+    expect(batch_result.status).to eq the_status
+
+    # confirm the server can receive the client close.
+    server_ops = {
+      CallOps::RECV_CLOSE_ON_SERVER => nil
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.send_close).to be true
+  end
+end
+
+shared_examples 'GRPC metadata delivery works OK' do
+  include_context 'setup: tags'
+
+  describe 'from client => server' do
+    before(:example) do
+      n = 7  # arbitrary number of metadata
+      diff_keys_fn = proc { |i| [format('k%d', i), format('v%d', i)] }
+      diff_keys = Hash[n.times.collect { |x| diff_keys_fn.call x }]
+      null_vals_fn = proc { |i| [format('k%d', i), format('v\0%d', i)] }
+      null_vals = Hash[n.times.collect { |x| null_vals_fn.call x }]
+      same_keys_fn = proc { |i| [format('k%d', i), [format('v%d', i)] * n] }
+      same_keys = Hash[n.times.collect { |x| same_keys_fn.call x }]
+      symbol_key = { a_key: 'a val' }
+      @valid_metadata = [diff_keys, same_keys, null_vals, symbol_key]
+      @bad_keys = []
+      @bad_keys << { Object.new => 'a value' }
+      @bad_keys << { 1 => 'a value' }
+    end
+
+    it 'raises an exception if a metadata key is invalid' do
+      @bad_keys.each do |md|
+        call = new_client_call
+        client_ops = {
+          CallOps::SEND_INITIAL_METADATA => md
+        }
+        blk = proc do
+          call.run_batch(@client_queue, @client_tag, deadline,
+                         client_ops)
+        end
+        expect(&blk).to raise_error
+      end
+    end
+
+    it 'sends all the metadata pairs when keys and values are valid' do
+      @valid_metadata.each do |md|
+        recvd_rpc = nil
+        rcv_thread = Thread.new do
+          recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+        end
+
+        call = new_client_call
+        client_ops = {
+          CallOps::SEND_INITIAL_METADATA => md
+        }
+        batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                      client_ops)
+        expect(batch_result.send_metadata).to be true
+
+        # confirm the server can receive the client metadata
+        rcv_thread.join
+        expect(recvd_rpc).to_not eq nil
+        recvd_md = recvd_rpc.metadata
+        replace_symbols = Hash[md.each_pair.collect { |x, y| [x.to_s, y] }]
+        expect(recvd_md).to eq(recvd_md.merge(replace_symbols))
+      end
+    end
+  end
+
+  describe 'from server => client' do
+    before(:example) do
+      n = 7  # arbitrary number of metadata
+      diff_keys_fn = proc { |i| [format('k%d', i), format('v%d', i)] }
+      diff_keys = Hash[n.times.collect { |x| diff_keys_fn.call x }]
+      null_vals_fn = proc { |i| [format('k%d', i), format('v\0%d', i)] }
+      null_vals = Hash[n.times.collect { |x| null_vals_fn.call x }]
+      same_keys_fn = proc { |i| [format('k%d', i), [format('v%d', i)] * n] }
+      same_keys = Hash[n.times.collect { |x| same_keys_fn.call x }]
+      symbol_key = { a_key: 'a val' }
+      @valid_metadata = [diff_keys, same_keys, null_vals, symbol_key]
+      @bad_keys = []
+      @bad_keys << { Object.new => 'a value' }
+      @bad_keys << { 1 => 'a value' }
+    end
+
+    it 'raises an exception if a metadata key is invalid' do
+      @bad_keys.each do |md|
+        recvd_rpc = nil
+        rcv_thread = Thread.new do
+          recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+        end
+
+        call = new_client_call
+        # client signals that it's done sending metadata to allow server to
+        # respond
+        client_ops = {
+          CallOps::SEND_INITIAL_METADATA => nil
+        }
+        call.run_batch(@client_queue, @client_tag, deadline, client_ops)
+
+        # server gets the invocation
+        rcv_thread.join
+        expect(recvd_rpc).to_not eq nil
+        server_ops = {
+          CallOps::SEND_INITIAL_METADATA => md
+        }
+        blk = proc do
+          recvd_rpc.call.run_batch(@server_queue, @server_tag, deadline,
+                                   server_ops)
+        end
+        expect(&blk).to raise_error
+      end
+    end
+
+    it 'sends an empty hash if no metadata is added' do
+      recvd_rpc = nil
+      rcv_thread = Thread.new do
+        recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+      end
+
+      call = new_client_call
+      # client signals that it's done sending metadata to allow server to
+      # respond
+      client_ops = {
+        CallOps::SEND_INITIAL_METADATA => nil
+      }
+      call.run_batch(@client_queue, @client_tag, deadline, client_ops)
+
+      # server gets the invocation but sends no metadata back
+      rcv_thread.join
+      expect(recvd_rpc).to_not eq nil
+      server_call = recvd_rpc.call
+      server_ops = {
+        CallOps::SEND_INITIAL_METADATA => nil
+      }
+      server_call.run_batch(@server_queue, @server_tag, deadline, server_ops)
+
+      # client receives nothing as expected
+      client_ops = {
+        CallOps::RECV_INITIAL_METADATA => nil
+      }
+      batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                    client_ops)
+      expect(batch_result.metadata).to eq({})
+    end
+
+    it 'sends all the pairs when keys and values are valid' do
+      @valid_metadata.each do |md|
+        recvd_rpc = nil
+        rcv_thread = Thread.new do
+          recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+        end
+
+        call = new_client_call
+        # client signals that it's done sending metadata to allow server to
+        # respond
+        client_ops = {
+          CallOps::SEND_INITIAL_METADATA => nil
+        }
+        call.run_batch(@client_queue, @client_tag, deadline, client_ops)
+
+        # server gets the invocation but sends no metadata back
+        rcv_thread.join
+        expect(recvd_rpc).to_not eq nil
+        server_call = recvd_rpc.call
+        server_ops = {
+          CallOps::SEND_INITIAL_METADATA => md
+        }
+        server_call.run_batch(@server_queue, @server_tag, deadline, server_ops)
+
+        # client receives nothing as expected
+        client_ops = {
+          CallOps::RECV_INITIAL_METADATA => nil
+        }
+        batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                      client_ops)
+        replace_symbols = Hash[md.each_pair.collect { |x, y| [x.to_s, y] }]
+        expect(batch_result.metadata).to eq(replace_symbols)
+      end
+    end
+  end
+end
+
+describe 'the http client/server' do
+  before(:example) do
+    server_host = '0.0.0.0:0'
+    @client_queue = GRPC::Core::CompletionQueue.new
+    @server_queue = GRPC::Core::CompletionQueue.new
+    @server = GRPC::Core::Server.new(@server_queue, nil)
+    server_port = @server.add_http2_port(server_host, :this_port_is_insecure)
+    @server.start
+    @ch = Channel.new("0.0.0.0:#{server_port}", nil, :this_channel_is_insecure)
+  end
+
+  after(:example) do
+    @ch.close
+    @server.close(@server_queue, deadline)
+  end
+
+  it_behaves_like 'basic GRPC message delivery is OK' do
+  end
+
+  it_behaves_like 'GRPC metadata delivery works OK' do
+  end
+end
+
+describe 'the secure http client/server' do
+  include_context 'setup: tags'
+
+  def load_test_certs
+    test_root = File.join(File.dirname(__FILE__), 'testdata')
+    files = ['ca.pem', 'server1.key', 'server1.pem']
+    files.map { |f| File.open(File.join(test_root, f)).read }
+  end
+
+  before(:example) do
+    certs = load_test_certs
+    server_host = '0.0.0.0:0'
+    @client_queue = GRPC::Core::CompletionQueue.new
+    @server_queue = GRPC::Core::CompletionQueue.new
+    server_creds = GRPC::Core::ServerCredentials.new(
+      nil, [{ private_key: certs[1], cert_chain: certs[2] }], false)
+    @server = GRPC::Core::Server.new(@server_queue, nil)
+    server_port = @server.add_http2_port(server_host, server_creds)
+    @server.start
+    args = { Channel::SSL_TARGET => 'foo.test.google.fr' }
+    @ch = Channel.new("0.0.0.0:#{server_port}", args,
+                      GRPC::Core::ChannelCredentials.new(certs[0], nil, nil))
+  end
+
+  after(:example) do
+    @server.close(@server_queue, deadline)
+  end
+
+  it_behaves_like 'basic GRPC message delivery is OK' do
+  end
+
+  it_behaves_like 'GRPC metadata delivery works OK' do
+  end
+
+  it 'modifies metadata with CallCredentials' do
+    auth_proc = proc { { 'k1' => 'updated-v1' } }
+    call_creds = GRPC::Core::CallCredentials.new(auth_proc)
+    md = { 'k2' => 'v2' }
+    expected_md = { 'k1' => 'updated-v1', 'k2' => 'v2' }
+    recvd_rpc = nil
+    rcv_thread = Thread.new do
+      recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+    end
+
+    call = new_client_call
+    call.set_credentials! call_creds
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => md
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+
+    # confirm the server can receive the client metadata
+    rcv_thread.join
+    expect(recvd_rpc).to_not eq nil
+    recvd_md = recvd_rpc.metadata
+    replace_symbols = Hash[expected_md.each_pair.collect { |x, y| [x.to_s, y] }]
+    expect(recvd_md).to eq(recvd_md.merge(replace_symbols))
+  end
+end