The core of the project is an HTTP server called Scripting Layer for Fuchsia (SL4F), which runs on Fuchsia devices. The server processes JSON RPC requests from remote host driven test frameworks in the form of core service commands, parses these requests, and fulfills them with the appropriate Fuchsia equivalent (FIDL) commands.
To include SL4F by default to the build include it with your build: --with garnet/bin/sl4f:bin
fx build-push sl4f
.fx shell
run killall sl4f.cmx
.fx shell
instance: run fuchsia-pkg://fuchsia.com/sl4f#meta/sl4f.cmx
. Note that you can tune your test framework to open an ssh connection to run SL4F in the background.Facades is a term used in SL4F to represent the actual wrapper for FIDL apis and maintain statefulness of the context. For example if there is an asyncronous event the Facade will keep track of anything important to verify for testing at a later time.
In garnet/bin/sl4f/server/sl4f.rs
there is a macro called with_line
. Use this with your tag in your log lines.
Example:
200: let tag = "GenericFacade::func"; 201: fx_log_info!(tag: &with_line!(tag), "{:?}", "Really important log.");
This outputs to
GenericFacade::func:201 Really important log.