Jens-G commented on code in PR #3387:
URL: https://github.com/apache/thrift/pull/3387#discussion_r3082361835


##########
lib/rb/spec/compact_protocol_spec.rb:
##########
@@ -71,6 +81,46 @@
     end
   end
 
+  it "should round-trip signed integer boundaries correctly" do
+    INTEGER_BOUNDARY_TESTS.each_pair do |primitive_type, test_values|
+      test_values.each do |value|
+        trans = Thrift::MemoryBufferTransport.new
+        proto = Thrift::CompactProtocol.new(trans)
+
+        proto.send(writer(primitive_type), value)
+        expect(proto.send(reader(primitive_type))).to eq(value)
+      end
+    end
+  end
+
+  it "should encode signed integer minima with the canonical zigzag varint 
bytes" do
+    INTEGER_MINIMUM_ENCODINGS.each_pair do |primitive_type, expected_bytes|
+      trans = Thrift::MemoryBufferTransport.new
+      proto = Thrift::CompactProtocol.new(trans)
+
+      proto.send(writer(primitive_type), 
INTEGER_BOUNDARY_TESTS.fetch(primitive_type).first)
+      expect(trans.read(trans.available).bytes).to eq(expected_bytes)
+    end
+  end
+
+  it "should decode i32 minima from direct canonical zigzag bytes" do
+    trans = Thrift::MemoryBufferTransport.new

Review Comment:
   Can we have that for i64 too?



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