Update the template to have testing available

template/Cargo.toml

@@ -9,6 +9,9 @@ edition = "2018"
 [dependencies]
 agb = "0.9.2"
 
+[dev-dependencies]
+agb = { version = "0.9.2", features = ["testing"] }
+
 [profile.release]
 panic = "abort"
 lto = true

template/src/main.rs

@@ -9,6 +9,10 @@
 // using the #[agb::entry] proc macro. Failing to do so will cause failure in linking
 // which won't be a particularly clear error message.
 #![no_main]
+// This is required to allow writing tests
+#![cfg_attr(test, feature(custom_test_frameworks))]
+#![cfg_attr(test, reexport_test_harness_main = "test_main")]
+#![cfg_attr(test, test_runner(agb::test_runner::test_runner))]
 
 use agb::{display, syscall};