src/devices/testing/devices_test_realm.shard.cml

{
    collections: [
        {
            name: "devices-tests",
            environment: "#legacy-test-env",
            durability: "transient",
        },
    ],
    offer: [
        {
            // These hermetic capabilities are offered to be used by tests.
            protocol: [
                // Tests can write to debug logs
                "fuchsia.boot.WriteOnlyLog",
                "fuchsia.logger.LogSink",
                "fuchsia.process.Launcher",
                "fuchsia.sys2.EventSource",

                // Tests can produce trace.
                "fuchsia.tracing.provider.Registry",
            ],
            from: "parent",
            to: [ "#devices-tests" ],
        },
        {
            storage: "data",
            from: "self",
            to: [ "#devices-tests" ],
        },
        {
            storage: "tmp",
            from: "self",
            to: [ "#devices-tests" ],
        },
        {
            storage: "cache",
            from: "self",
            to: [ "#devices-tests" ],
        },
        {
            storage: "custom_artifacts",
            from: "self",
            to: "#devices-tests",
        },

        // These system capabilities are offered for use by the devices tests.
        {
            directory: "dev",
            from: "parent",
            to: "#devices-tests",
        },
    ],
}