This directory contains a simple example using program arguments and environment variables in Component Framework.
If these components are not present in your build, they can be added by appending --with //examples to your fx set command. For example:
$ fx set core.x64 --with //examples --with //examples:tests $ fx build
Use ffx component run to launch this component into a restricted realm for development purposes:
C++
$ ffx component run /core/ffx-laboratory:echo_cpp fuchsia-pkg://fuchsia.com/echo-example#meta/echo_cpp.cm
Rust
$ ffx component run /core/ffx-laboratory:echo_rust fuchsia-pkg://fuchsia.com/echo-example#meta/echo_rust.cm
When the above command is run, you can see the following output with fx log:
[echo] INFO: Hello, Alice, Bob, Spot!
Unit tests for echo are available in the echo-unittests package. Use the ffx test run command to run the tests on a target device:
C++
$ ffx test run fuchsia-pkg://fuchsia.com/echo-cpp-unittests#meta/echo-cpp-unittests.cm
You should see each of the unit tests execute and pass:
[RUNNING] EchoTest.TestGreetOne [PASSED] EchoTest.TestGreetOne [RUNNING] EchoTest.TestGreetTwo [PASSED] EchoTest.TestGreetTwo [RUNNING] EchoTest.TestGreetThree [PASSED] EchoTest.TestGreetThree 3 out of 3 tests passed... fuchsia-pkg://fuchsia.com/echo-cpp-unittests#meta/echo-cpp-unittests.cm completed with result: PASSED
Rust
$ ffx test run fuchsia-pkg://fuchsia.com/echo-rust-unittests#meta/echo-rust-unittests.cm
You should see each of the unit tests execute and pass:
Running test 'fuchsia-pkg://fuchsia.com/echo-rust-unittests#meta/echo-rust-unittests.cm' [RUNNING] tests::test_greet_one [RUNNING] tests::test_greet_two [RUNNING] tests::test_greet_three [PASSED] tests::test_greet_one [PASSED] tests::test_greet_two [PASSED] tests::test_greet_three 3 out of 3 tests passed...