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mxaccessgw/docs/CrossLanguageSmokeMatrix.md
2026-04-26 21:21:49 -04:00

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# Cross-Language Smoke Matrix
The cross-language smoke matrix defines the documented commands used to compare
official clients against the same live gateway flow. It is a repository
validation fixture and command reference; normal unit tests validate the matrix
shape without connecting to a gateway.
The matrix lives in
`clients/proto/fixtures/smoke/cross-language-smoke-matrix.json`.
## Scope
The matrix covers the supported client languages:
- .NET
- Go
- Rust
- Python
- Java
Each client entry defines commands for the same required operation sequence:
1. `open-session`
2. `register`
3. `add-item`
4. `advise`
5. `stream-events`
6. `close-session`
The optional `write` command is documented separately because writing changes
provider state and should only run when the operator supplies a safe test value.
## Integration Gate
Cross-language smoke execution is opt-in. Runners should skip the matrix unless
this variable is set:
```powershell
$env:MXGATEWAY_INTEGRATION = "1"
```
The shared inputs are:
| Variable | Default | Purpose |
|----------|---------|---------|
| `MXGATEWAY_ENDPOINT` | `localhost:5000` | Gateway endpoint used by client CLIs. |
| `MXGATEWAY_API_KEY` | Empty | API key source for authenticated gateway deployments. |
| `MXGATEWAY_TEST_ITEM` | `TestChildObject.TestInt` | MXAccess item used by `add-item`. |
| `MXGATEWAY_TEST_WRITE_VALUE` | Empty | Enables the optional write step when set by a runner. |
The commands in the matrix use `MXGATEWAY_API_KEY` through each CLI's
`api-key-env` flag. They must not embed bearer tokens or raw API keys.
## JSON Comparison
Every command in the matrix requests JSON output. A runner can compare the
normalized smoke record across languages with these fields:
- language,
- operation,
- session id,
- server handle,
- item handle,
- event count,
- event family,
- worker sequence,
- protocol status,
- HRESULT,
- status arrays,
- close status.
Failure output must include the client language, endpoint, and redacted auth
context. Auth context identifies the source, such as `MXGATEWAY_API_KEY`, but
does not include the secret value.
## Bundled Smoke Commands
Each client also exposes a bundled `smoke` command. Those commands are useful
for quick local checks, but the full cross-language matrix uses explicit
operation commands because not every bundled smoke command streams events yet.
The explicit sequence remains the parity baseline for issue-level validation.
## Validation
Run the matrix shape tests after changing the smoke matrix:
```bash
dotnet test src/MxGateway.Tests/MxGateway.Tests.csproj --filter FullyQualifiedName~CrossLanguageSmokeMatrixTests
```
Live execution remains a separate opt-in step because it depends on a running
gateway, the installed MXAccess worker path, and provider state.
## Related Documentation
- [Gateway Testing](./GatewayTesting.md)
- [Client Libraries Detailed Design](./client-libraries-design.md)
- [Client Proto Generation](./client-proto-generation.md)