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test(mqtt): Mosquitto TLS+auth fixture + env-gated plain live suite

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Adds the MQTT driver integration-test project: an eclipse-mosquitto fixture running
auth AND TLS (allow_anonymous false on both listeners), a mosquitto_pub-based JSON
publisher emitting retained messages, a cert/password generator script whose output is
gitignored, and a live suite gated on MQTT_FIXTURE_ENDPOINT that skips clean offline.

The fixture is never anonymous by design: an anonymous broker would let the driver's
TLS/CA-pin and auth paths go untested, and those fail silently. The CA-pin leg carries
its own falsifiability control (a foreign CA generated in-process must be rejected).

Live gate on 10.100.0.35: 7/7 passed. It found a driver defect, reported not fixed
here (src/ is out of this task's scope): MqttConnection.ConnectAsync RETURNS NORMALLY
when Mosquitto rejects a CONNECT as not-authorized -- MQTTnet 5 does not throw on an
unsuccessful CONNACK, so a wrong broker password yields DriverState.Healthy from
InitializeAsync. The auth-negative test therefore asserts the invariant that holds
either way (no session is ever established) and documents the finding.

Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
This commit is contained in:
Joseph Doherty
2026-07-24 17:49:14 -04:00
parent ff62b62a55
commit 033b3700c4
9 changed files with 1231 additions and 0 deletions
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ZB.MOM.WW.OtOpcUa.slnx
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@@ -108,6 +108,7 @@
<Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.Tests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.Tests.csproj" />
<Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests.csproj" />
<Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Mqtt.Tests/ZB.MOM.WW.OtOpcUa.Driver.Mqtt.Tests.csproj" />
<Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Mqtt.IntegrationTests/ZB.MOM.WW.OtOpcUa.Driver.Mqtt.IntegrationTests.csproj" />
</Folder>
<Folder Name="/tests/Drivers/Driver CLIs/">
<Project Path="tests/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Cli.Common.Tests/ZB.MOM.WW.OtOpcUa.Driver.Cli.Common.Tests.csproj" />