More Fuzzy Features

README.md

@@ -116,8 +116,9 @@ for more.
 
 ### Kitchen Sink Workflow
 
-The idea here was to strike a balance between a generic workflow implementation that would work for 99% of scenarios
-while maintaining code simplicity and debuggability.
+The Kitchen Sink workflows accepts a DSL generated by the `kitchen-sink-gen` Rust tool, allowing us
+to test a wide variety of scenarios without having to imagine all possible edge cases that could
+come up in workflows. Input may be saved for regression testing, or hand written for specific cases.
 
 ### Scenario Failure
 
@@ -129,3 +130,7 @@ workflow that waits for a signal for a configurable amount of time.
 
 - Nicer output that includes resource utilization for the worker (when running all-in-one)
 - More lang workers
+
+## Fuzzer trophy case
+
+* Python upsert SA with no initial attributes: [PR](https://github.com/temporalio/sdk-python/pull/440)

cmd/cmdoptions/client.go

@@ -3,12 +3,16 @@ package cmdoptions
 import (
 	"context"
 	"crypto/tls"
+	"encoding/base64"
 	"errors"
 	"fmt"
 	"os"
 
+	"github.com/golang/protobuf/proto"
 	"github.com/spf13/pflag"
+	"go.temporal.io/api/common/v1"
 	"go.temporal.io/sdk/client"
+	"go.temporal.io/sdk/converter"
 	"go.uber.org/zap"
 )
 
@@ -94,6 +98,16 @@ func (c *ClientOptions) Dial(metrics *Metrics, logger *zap.SugaredLogger) (clien
 		})
 	}
 
+	dataConverter := converter.NewCompositeDataConverter(
+		converter.NewNilPayloadConverter(),
+		converter.NewByteSlicePayloadConverter(),
+		&PassThroughPayloadConverter{},
+		converter.NewProtoJSONPayloadConverter(),
+		converter.NewProtoPayloadConverter(),
+		converter.NewJSONPayloadConverter(),
+	)
+	clientOptions.DataConverter = dataConverter
+
 	client, err := client.Dial(clientOptions)
 	if err != nil {
 		return nil, fmt.Errorf("failed to dial: %w", err)
@@ -135,3 +149,39 @@ func (c *ClientOptions) ToFlags() (flags []string) {
 	}
 	return
 }
+
+type PassThroughPayloadConverter struct{}
+
+func (p *PassThroughPayloadConverter) ToPayload(value interface{}) (*common.Payload, error) {
+	if valuePayload, ok := value.(*common.Payload); ok {
+		asBytes, err := proto.Marshal(valuePayload)
+		if err != nil {
+			return nil, fmt.Errorf("unable to encode raw payload: %w", err)
+		}
+
+		return &common.Payload{
+			Metadata: map[string][]byte{
+				"encoding": []byte(p.Encoding()),
+			},
+			Data: asBytes,
+		}, nil
+	}
+	return nil, nil
+}
+
+func (p *PassThroughPayloadConverter) FromPayload(payload *common.Payload, valuePtr interface{}) error {
+	innerPayload := &common.Payload{}
+	err := proto.Unmarshal(payload.GetData(), innerPayload)
+	if err != nil {
+		return fmt.Errorf("unable to decode raw payload: %w", err)
+	}
+	return converter.GetDefaultDataConverter().FromPayload(innerPayload, valuePtr)
+}
+
+func (p *PassThroughPayloadConverter) ToString(payload *common.Payload) string {
+	return base64.RawStdEncoding.EncodeToString(payload.GetData())
+}
+
+func (p *PassThroughPayloadConverter) Encoding() string {
+	return "_passthrough"
+}

loadgen/kitchen-sink-gen/Cargo.toml

@@ -14,6 +14,8 @@ derive_more = "0.99"
 prost = "0.12"
 prost-types = "0.12"
 rand = "0.8"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 
 [build-dependencies]
 prost-build = "0.12"

loadgen/kitchen-sink-gen/build.rs

@@ -53,7 +53,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             cmd.arg(format!("--python_out={out_dir}"));
             cmd.arg(format!("--pyi_out={out_dir}"));
         } else if lang == "go" {
-            cmd.arg(format!("--go_opt=paths=source_relative"));
+            cmd.arg("--go_opt=paths=source_relative");
             cmd.arg(format!("--go_out={out_dir}"));
         }
 
@@ -78,7 +78,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 let new_data = content.replace("from temporal.api", "from temporalio.api");
 
                 let mut dst = fs::File::create(&fpath)?;
-                dst.write(new_data.as_bytes())?;
+                dst.write_all(new_data.as_bytes())?;
             }
         }
     }