Initial checkin of gRPC to third_party/

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

Index: third_party/grpc/src/ruby/spec/generic/active_call_spec.rb
diff --git a/third_party/grpc/src/ruby/spec/generic/active_call_spec.rb b/third_party/grpc/src/ruby/spec/generic/active_call_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'
+
+include GRPC::Core::StatusCodes
+
+describe GRPC::ActiveCall do
+  ActiveCall = GRPC::ActiveCall
+  Call = GRPC::Core::Call
+  CallOps = GRPC::Core::CallOps
+  WriteFlags = GRPC::Core::WriteFlags
+
+  before(:each) do
+    @pass_through = proc { |x| x }
+    @server_tag = Object.new
+    @tag = Object.new
+
+    @client_queue = GRPC::Core::CompletionQueue.new
+    @server_queue = GRPC::Core::CompletionQueue.new
+    host = '0.0.0.0:0'
+    @server = GRPC::Core::Server.new(@server_queue, nil)
+    server_port = @server.add_http2_port(host, :this_port_is_insecure)
+    @server.start
+    @ch = GRPC::Core::Channel.new("0.0.0.0:#{server_port}", nil,
+                                  :this_channel_is_insecure)
+  end
+
+  after(:each) do
+    @server.close(@server_queue, deadline)
+  end
+
+  describe 'restricted view methods' do
+    before(:each) do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      @client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                    @pass_through, deadline,
+                                    metadata_tag: md_tag)
+    end
+
+    describe '#multi_req_view' do
+      it 'exposes a fixed subset of the ActiveCall methods' do
+        want = %w(cancelled, deadline, each_remote_read, metadata, shutdown)
+        v = @client_call.multi_req_view
+        want.each do |w|
+          expect(v.methods.include?(w))
+        end
+      end
+    end
+
+    describe '#single_req_view' do
+      it 'exposes a fixed subset of the ActiveCall methods' do
+        want = %w(cancelled, deadline, metadata, shutdown)
+        v = @client_call.single_req_view
+        want.each do |w|
+          expect(v.methods.include?(w))
+        end
+      end
+    end
+  end
+
+  describe '#remote_send' do
+    it 'allows a client to send a payload to the server' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      @client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                    @pass_through, deadline,
+                                    metadata_tag: md_tag)
+      msg = 'message is a string'
+      @client_call.remote_send(msg)
+
+      # check that server rpc new was received
+      recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
+      expect(recvd_rpc).to_not eq nil
+      recvd_call = recvd_rpc.call
+
+      # Accept the call, and verify that the server reads the response ok.
+      server_ops = {
+        CallOps::SEND_INITIAL_METADATA => {}
+      }
+      recvd_call.run_batch(@server_queue, @server_tag, deadline, server_ops)
+      server_call = ActiveCall.new(recvd_call, @server_queue, @pass_through,
+                                   @pass_through, deadline)
+      expect(server_call.remote_read).to eq(msg)
+    end
+
+    it 'marshals the payload using the marshal func' do
+      call = make_test_call
+      ActiveCall.client_invoke(call, @client_queue)
+      marshal = proc { |x| 'marshalled:' + x }
+      client_call = ActiveCall.new(call, @client_queue, marshal,
+                                   @pass_through, deadline)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+
+      # confirm that the message was marshalled
+      recvd_rpc =  @server.request_call(@server_queue, @server_tag, deadline)
+      recvd_call = recvd_rpc.call
+      server_ops = {
+        CallOps::SEND_INITIAL_METADATA => nil
+      }
+      recvd_call.run_batch(@server_queue, @server_tag, deadline, server_ops)
+      server_call = ActiveCall.new(recvd_call, @server_queue, @pass_through,
+                                   @pass_through, deadline)
+      expect(server_call.remote_read).to eq('marshalled:' + msg)
+    end
+
+    TEST_WRITE_FLAGS = [WriteFlags::BUFFER_HINT, WriteFlags::NO_COMPRESS]
+    TEST_WRITE_FLAGS.each do |f|
+      it "successfully makes calls with write_flag set to #{f}" do
+        call = make_test_call
+        ActiveCall.client_invoke(call, @client_queue)
+        marshal = proc { |x| 'marshalled:' + x }
+        client_call = ActiveCall.new(call, @client_queue, marshal,
+                                     @pass_through, deadline)
+        msg = 'message is a string'
+        client_call.write_flag = f
+        client_call.remote_send(msg)
+
+        # confirm that the message was marshalled
+        recvd_rpc =  @server.request_call(@server_queue, @server_tag, deadline)
+        recvd_call = recvd_rpc.call
+        server_ops = {
+          CallOps::SEND_INITIAL_METADATA => nil
+        }
+        recvd_call.run_batch(@server_queue, @server_tag, deadline, server_ops)
+        server_call = ActiveCall.new(recvd_call, @server_queue, @pass_through,
+                                     @pass_through, deadline)
+        expect(server_call.remote_read).to eq('marshalled:' + msg)
+      end
+    end
+  end
+
+  describe '#client_invoke' do
+    it 'sends keywords as metadata to the server when the are present' do
+      call = make_test_call
+      ActiveCall.client_invoke(call, @client_queue, k1: 'v1', k2: 'v2')
+      recvd_rpc =  @server.request_call(@server_queue, @server_tag, deadline)
+      recvd_call = recvd_rpc.call
+      expect(recvd_call).to_not be_nil
+      expect(recvd_rpc.metadata).to_not be_nil
+      expect(recvd_rpc.metadata['k1']).to eq('v1')
+      expect(recvd_rpc.metadata['k2']).to eq('v2')
+    end
+  end
+
+  describe '#remote_read' do
+    it 'reads the response sent by a server' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      expect(client_call.remote_read).to eq('server_response')
+    end
+
+    it 'saves no metadata when the server adds no metadata' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('ignore me')
+      expect(client_call.metadata).to be_nil
+      client_call.remote_read
+      expect(client_call.metadata).to eq({})
+    end
+
+    it 'saves metadata add by the server' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg, k1: 'v1', k2: 'v2')
+      server_call.remote_send('ignore me')
+      expect(client_call.metadata).to be_nil
+      client_call.remote_read
+      expected = { 'k1' => 'v1', 'k2' => 'v2' }
+      expect(client_call.metadata).to eq(expected)
+    end
+
+    it 'get a nil msg before a status when an OK status is sent' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      client_call.writes_done(false)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      server_call.send_status(OK, 'OK')
+      expect(client_call.remote_read).to eq('server_response')
+      res = client_call.remote_read
+      expect(res).to be_nil
+    end
+
+    it 'unmarshals the response using the unmarshal func' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      unmarshal = proc { |x| 'unmarshalled:' + x }
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   unmarshal, deadline,
+                                   metadata_tag: md_tag)
+
+      # confirm the client receives the unmarshalled message
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      expect(client_call.remote_read).to eq('unmarshalled:server_response')
+    end
+  end
+
+  describe '#each_remote_read' do
+    it 'creates an Enumerator' do
+      call = make_test_call
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline)
+      expect(client_call.each_remote_read).to be_a(Enumerator)
+    end
+
+    it 'the returns an enumerator that can read n responses' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      reply = 'server_response'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      e = client_call.each_remote_read
+      n = 3  # arbitrary value > 1
+      n.times do
+        server_call.remote_send(reply)
+        expect(e.next).to eq(reply)
+      end
+    end
+
+    it 'the returns an enumerator that stops after an OK Status' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      reply = 'server_response'
+      client_call.remote_send(msg)
+      client_call.writes_done(false)
+      server_call = expect_server_to_receive(msg)
+      e = client_call.each_remote_read
+      n = 3 # arbitrary value > 1
+      n.times do
+        server_call.remote_send(reply)
+        expect(e.next).to eq(reply)
+      end
+      server_call.send_status(OK, 'OK')
+      expect { e.next }.to raise_error(StopIteration)
+    end
+  end
+
+  describe '#writes_done' do
+    it 'finishes ok if the server sends a status response' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      expect { client_call.writes_done(false) }.to_not raise_error
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      expect(client_call.remote_read).to eq('server_response')
+      server_call.send_status(OK, 'status code is OK')
+      expect { client_call.finished }.to_not raise_error
+    end
+
+    it 'finishes ok if the server sends an early status response' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      server_call.send_status(OK, 'status code is OK')
+      expect(client_call.remote_read).to eq('server_response')
+      expect { client_call.writes_done(false) }.to_not raise_error
+      expect { client_call.finished }.to_not raise_error
+    end
+
+    it 'finishes ok if writes_done is true' do
+      call = make_test_call
+      md_tag = ActiveCall.client_invoke(call, @client_queue)
+      client_call = ActiveCall.new(call, @client_queue, @pass_through,
+                                   @pass_through, deadline,
+                                   metadata_tag: md_tag)
+      msg = 'message is a string'
+      client_call.remote_send(msg)
+      server_call = expect_server_to_receive(msg)
+      server_call.remote_send('server_response')
+      server_call.send_status(OK, 'status code is OK')
+      expect(client_call.remote_read).to eq('server_response')
+      expect { client_call.writes_done(true) }.to_not raise_error
+    end
+  end
+
+  def expect_server_to_receive(sent_text, **kw)
+    c = expect_server_to_be_invoked(**kw)
+    expect(c.remote_read).to eq(sent_text)
+    c
+  end
+
+  def expect_server_to_be_invoked(**kw)
+    recvd_rpc =  @server.request_call(@server_queue, @server_tag, deadline)
+    expect(recvd_rpc).to_not eq nil
+    recvd_call = recvd_rpc.call
+    recvd_call.run_batch(@server_queue, @server_tag, deadline,
+                         CallOps::SEND_INITIAL_METADATA => kw)
+    ActiveCall.new(recvd_call, @server_queue, @pass_through,
+                   @pass_through, deadline)
+  end
+
+  def make_test_call
+    @ch.create_call(@client_queue, nil, nil, '/method', nil, deadline)
+  end
+
+  def deadline
+    Time.now + 2  # in 2 seconds; arbitrary
+  end
+end