Joseph Doherty
59 lines
2.4 KiB
Markdown
59 lines
2.4 KiB
Markdown
# Gateway Testing
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Gateway tests run without installed MXAccess by using fake workers, fake
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transports, and in-process gRPC service fakes. Live MXAccess verification belongs
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in opt-in integration tests because it depends on installed COM components and
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provider state.
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## Fake Worker Harness
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`FakeWorkerHarness` in `src/MxGateway.Tests/Gateway/Workers/Fakes/` provides an
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in-process worker side for named-pipe IPC tests. It uses the same
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`WorkerFrameReader`, `WorkerFrameWriter`, and `WorkerEnvelope` contract as the
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gateway so tests exercise real frame validation and worker-client state changes.
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Use the harness when a gateway or session test needs worker behavior without
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starting `MxGateway.Worker.exe` or loading MXAccess COM. The harness scripts:
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- `WorkerHello` and `WorkerReady` startup,
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- command replies with matching correlation ids,
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- ordered `WorkerEvent` frames,
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- `WorkerFault` frames,
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- shutdown acknowledgements,
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- malformed protobuf payloads and oversized frame headers,
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- slow or hung workers by withholding a reply.
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Session-level tests can connect the harness to the pipe created by
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`SessionWorkerClientFactory` with `ConnectToGatewayPipeAsync`. Lower-level
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`WorkerClient` tests can use `CreateConnectedPairAsync` to create both pipe ends
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inside the test.
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`GatewayEndToEndFakeWorkerSmokeTests` composes the real gRPC service,
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`SessionManager`, `SessionWorkerClientFactory`, `WorkerClient`, and
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`EventStreamService` with a scripted fake worker launcher. The smoke test covers
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`OpenSession`, `Register`, `AddItem`, `Advise`, one streamed `OnDataChange`
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event, and `CloseSession` without loading MXAccess COM.
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## Focused Commands
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Run the fake worker tests after changing gateway worker IPC, session startup, or
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event streaming behavior:
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```bash
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dotnet test src/MxGateway.Tests/MxGateway.Tests.csproj --filter FullyQualifiedName~FakeWorkerHarnessTests
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dotnet test src/MxGateway.Tests/MxGateway.Tests.csproj --filter FullyQualifiedName~SessionWorkerClientFactoryFakeWorkerTests
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dotnet test src/MxGateway.Tests/MxGateway.Tests.csproj --filter FullyQualifiedName~GatewayEndToEndFakeWorkerSmokeTests
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```
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Run the gateway test project after shared gateway test infrastructure changes:
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```bash
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dotnet test src/MxGateway.Tests/MxGateway.Tests.csproj
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```
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## Related Documentation
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- [Gateway Process Design](./gateway-process-design.md)
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- [Worker Frame Protocol](./WorkerFrameProtocol.md)
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- [MXAccess Worker Instance Detailed Design](./mxaccess-worker-instance-design.md)
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