Another Ruby build fix

src/ruby/pb/test/client.rb

@@ -102,7 +102,7 @@ def create_stub(opts)
   if ['client_compressed_unary',
       'client_compressed_streaming'].include?(opts.test_case)
     compression_options =
-      GRPC::Core::CompressionOptions.new(default_algorithm: :gzip)
+      GRPC::Core::CompressionOptions.new(default_algorithm: :message/gzip)
     compression_channel_args = compression_options.to_channel_arg_hash
   else
     compression_channel_args = {}

src/ruby/spec/compression_options_spec.rb

@@ -19,7 +19,7 @@ describe GRPC::Core::CompressionOptions do
   # according to what the core lib provides.
 
   # Names of supported compression algorithms
-  ALGORITHMS = [:identity, :deflate, :gzip]
+  ALGORITHMS = [:identity, :message/deflate, :message/gzip]
 
   # Names of valid supported compression levels
   COMPRESS_LEVELS = [:none, :low, :medium, :high]
@@ -54,10 +54,10 @@ describe GRPC::Core::CompressionOptions do
       options = GRPC::Core::CompressionOptions.new(
         default_algorithm: :identity,
         default_level: :none,
-        disabled_algorithms: [:gzip, :deflate]
+        disabled_algorithms: [:message/gzip, :message/deflate]
       )
 
-      [:gzip, :deflate].each do |algorithm|
+      [:message/gzip, :message/deflate].each do |algorithm|
         expect(options.algorithm_enabled?(algorithm)).to be false
         expect(options.disabled_algorithms.include?(algorithm)).to be true
       end
@@ -69,16 +69,16 @@ describe GRPC::Core::CompressionOptions do
 
     it 'works when all optional args have been set' do
       options = GRPC::Core::CompressionOptions.new(
-        default_algorithm: :gzip,
+        default_algorithm: :message/gzip,
         default_level: :low,
-        disabled_algorithms: [:deflate]
+        disabled_algorithms: [:message/deflate]
       )
 
-      expect(options.algorithm_enabled?(:deflate)).to be false
-      expect(options.algorithm_enabled?(:gzip)).to be true
-      expect(options.disabled_algorithms).to eq([:deflate])
+      expect(options.algorithm_enabled?(:message/deflate)).to be false
+      expect(options.algorithm_enabled?(:message/gzip)).to be true
+      expect(options.disabled_algorithms).to eq([:message/deflate])
 
-      expect(options.default_algorithm).to be(:gzip)
+      expect(options.default_algorithm).to be(:message/gzip)
       expect(options.default_level).to be(:low)
       expect(options.to_hash).to be_instance_of(Hash)
     end
@@ -102,12 +102,12 @@ describe GRPC::Core::CompressionOptions do
 
   describe '#new with bad parameters' do
     it 'should fail with more than one parameter' do
-      blk = proc { GRPC::Core::CompressionOptions.new(:gzip, :none) }
+      blk = proc { GRPC::Core::CompressionOptions.new(:message/gzip, :none) }
       expect { blk.call }.to raise_error
     end
 
     it 'should fail with a non-hash parameter' do
-      blk = proc { GRPC::Core::CompressionOptions.new(:gzip) }
+      blk = proc { GRPC::Core::CompressionOptions.new(:message/gzip) }
       expect { blk.call }.to raise_error
     end
   end
@@ -137,7 +137,7 @@ describe GRPC::Core::CompressionOptions do
     [:none, :any, 'gzip', Object.new, 1].each do |name|
       it "should fail for parameter ${name} of class #{name.class}" do
         options = GRPC::Core::CompressionOptions.new(
-          disabled_algorithms: [:gzip])
+          disabled_algorithms: [:message/gzip])
 
         blk = proc do
           options.algorithm_enabled?(name)