Corrects the handling of metadata when the optional deadline is specified

src/ruby/lib/grpc/generic/service.rb

@@ -176,25 +176,26 @@ module GRPC
             unmarshal = desc.unmarshal_proc(:output)
             route = "/#{route_prefix}/#{name}"
             if desc.request_response?
-              define_method(mth_name) do |req, deadline = nil|
+              define_method(mth_name) do |req, deadline = nil, **kw|
                 logger.debug("calling #{@host}:#{route}")
-                request_response(route, req, marshal, unmarshal, deadline)
+                request_response(route, req, marshal, unmarshal, deadline, **kw)
               end
             elsif desc.client_streamer?
-              define_method(mth_name) do |reqs, deadline = nil|
+              define_method(mth_name) do |reqs, deadline = nil, **kw|
                 logger.debug("calling #{@host}:#{route}")
-                client_streamer(route, reqs, marshal, unmarshal, deadline)
+                client_streamer(route, reqs, marshal, unmarshal, deadline, **kw)
               end
             elsif desc.server_streamer?
-              define_method(mth_name) do |req, deadline = nil, &blk|
+              define_method(mth_name) do |req, deadline = nil, **kw, &blk|
                 logger.debug("calling #{@host}:#{route}")
-                server_streamer(route, req, marshal, unmarshal, deadline,
+                server_streamer(route, req, marshal, unmarshal, deadline, **kw,
                                 &blk)
               end
             else  # is a bidi_stream
-              define_method(mth_name) do |reqs, deadline = nil, &blk|
+              define_method(mth_name) do |reqs, deadline = nil, **kw, &blk|
                 logger.debug("calling #{@host}:#{route}")
-                bidi_streamer(route, reqs, marshal, unmarshal, deadline, &blk)
+                bidi_streamer(route, reqs, marshal, unmarshal, deadline, **kw,
+                              &blk)
               end
             end
           end
@@ -202,7 +203,7 @@ module GRPC
       end
 
       # Asserts that the appropriate methods are defined for each added rpc
-      # spec. Is intended to aid verifying that server classes are correctly
+      # spec. Is intended to aid verifying that serve2Ar classes are correctly
       # implemented.
       def assert_rpc_descs_have_methods
         rpc_descs.each_pair do |m, spec|

src/ruby/spec/generic/rpc_server_spec.rb

@@ -81,14 +81,17 @@ EchoStub = EchoService.rpc_stub_class
 class SlowService
   include GRPC::GenericService
   rpc :an_rpc, EchoMsg, EchoMsg
+  attr_reader :received_md, :delay
 
   def initialize(_default_var = 'ignored')
+    @delay = 0.25
+    @received_md = []
   end
 
-  def an_rpc(req, _call)
-    delay = 0.25
-    logger.info("starting a slow #{delay} rpc")
-    sleep delay
+  def an_rpc(req, call)
+    logger.info("starting a slow #{@delay} rpc")
+    sleep @delay
+    @received_md << call.metadata unless call.metadata.nil?
     req  # send back the req as the response
   end
 end
@@ -354,6 +357,37 @@ describe GRPC::RpcServer do
         t.join
       end
 
+      it 'should receive metadata when a deadline is specified', server: true do
+        service = SlowService.new
+        @srv.handle(service)
+        t = Thread.new { @srv.run }
+        @srv.wait_till_running
+        req = EchoMsg.new
+        stub = SlowStub.new(@host, **@client_opts)
+        deadline = service.delay + 0.5 # wait for long enough
+        expect(stub.an_rpc(req, deadline, k1: 'v1', k2: 'v2')).to be_a(EchoMsg)
+        wanted_md = [{ 'k1' => 'v1', 'k2' => 'v2' }]
+        expect(service.received_md).to eq(wanted_md)
+        @srv.stop
+        t.join
+      end
+
+      it 'should not receive metadata if the client times out', server: true do
+        service = SlowService.new
+        @srv.handle(service)
+        t = Thread.new { @srv.run }
+        @srv.wait_till_running
+        req = EchoMsg.new
+        stub = SlowStub.new(@host, **@client_opts)
+        deadline = 0.1  # too short for SlowService to respond
+        blk = proc { stub.an_rpc(req, deadline, k1: 'v1', k2: 'v2') }
+        expect(&blk).to raise_error GRPC::BadStatus
+        wanted_md = []
+        expect(service.received_md).to eq(wanted_md)
+        @srv.stop
+        t.join
+      end
+
       it 'should receive updated metadata', server: true do
         service = EchoService.new
         @srv.handle(service)